3Com ISDN Modem Network Card User Manual

®
Part No. 09-0885-001
Published July 1997
3COMIMPACT IQ
EXTERNAL ISDN MODEM
USER GUIDE
3Com Corporation
■
5400 Bayfront Plaza
■
Santa Clara, California
■
95052-8145
 3Com Corporation, 1997. All rights reserved. No part of this documentation may be reproduced
in any form or by any means or used to make any derivative work (such as translation,
transformation, or adaptation) without permission from 3Com Corporation.
3Com Corporation reserves the right to revise this documentation and to make changes in
content from time to time without obligation on the part of 3Com Corporation to provide
notification of such revision or change.
3Com Corporation provides this documentation without warranty of any kind, either implied or
expressed, including, but not limited to, the implied warranties of merchantability and fitness for a
particular purpose. 3Com may make improvements or changes in the product(s) and/or the
program(s) described in this documentation at any time.
UNITED STATES GOVERNMENT LEGENDS:
If you are a United States government agency, then this documentation and the software
described herein are provided to you subject to the following restricted rights:
For units of the Department of Defense:
Restricted Rights Legend: Use, duplication or disclosure by the Government is subject to restrictions
as set forth in subparagraph (c) (1) (ii) for restricted Rights in Technical Data and Computer
Software clause at 48 C.F.R. 52.227-7013. 3Com Corporation, 5400 Bayfront Plaza, Santa Clara,
California 95052-8145.
For civilian agencies:
Restricted Rights Legend: Use, reproduction or disclosure is subject to restrictions set forth in
subparagraph (a) through (d) of the Commercial Computer Software - Restricted Rights Clause at
48 C.F.R. 52.227-19 and the limitations set forth in 3Com Corporation’s standard commercial
agreement for the software. Unpublished rights reserved under the copyright laws of the United
States.
The software described in this documentation is furnished under a license agreement included
with the product either as a separate document or on the software distribution diskette in a root
directory file named LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a
copy will be provided to you.
Unless otherwise indicated, registered trademarks are registered in the United States and may or
may not be registered in other countries.
3Com is a registered trademark of 3Com Corporation. 3ComImpact is a trademark of 3Com
Corporation.
CompuServe is a registered trademark of CompuServe, Inc. IBM and AT are trademarks of
International Business Machines Corporation. Apple and Macintosh are trademarks of Apple
Computer Corporation. UL is a trademark of Underwriters Laboratories, Inc. Pentium is a
trademark of Intel Corporation. Microsoft, MS-DOS, Windows, and Windows NT are trademarks of
Microsoft Corporation. Siemens is a trademark of Siemens Artiengesellschaft. AT&T is a trademark
of American Telephone & Telegraph Company. Northern Telecom is a trademark of Northern
Telecom Limited. Motorola is a trademark of Motorola, Inc. LZS is a trademark of hi/fn, Inc. Hayes
is a trademark of Hayes Microcomputer Products, Inc. AdTran is a trademark of AdTran Inc.
Other brand and product names may be registered trademarks or trademarks of their respective
holders.
Guide written by Eric Heller.
®
5-YEAR
LIMITED WARRANTY
The warranty for the 3ComImpact™ IQ External ISDN
Modem is as stated in the Limited Warranty statement
found at the back of this User Guide with the
exception that the 3ComImpact IQ External ISDN
modem has a 5-year limited warranty on the
hardware in lieu of the standard 1-year warranty.
The software for the 3ComImpact IQ External ISDN
Modem has a 90-day warranty as further specified in
the Limited Warranty statement.
To ensure the very best 3Com service and support,
take the time to register on-line or complete the
product registration card.
CONTENTS
ABOUT THIS GUIDE
Introduction 1
How to Use This Guide
Conventions 2
1
1
INTRODUCTION
3C882 ISDN Modem Features 1-2
3C882 ISDN Modem Package Contents 1-4
Before You Install the 3C882 ISDN Modem 1-5
IBM PC or Compatible Requirements 1-6
Apple Macintosh Requirements 1-6
ISDN Information 1-7
2
INSTALLING THE 3C882 ISDN MODEM
Familiarizing Yourself with the 3C882 ISDN Modem
Installing a Serial Cable 2-3
Installing the ISDN Cable 2-5
Installing Analog Equipment 2-5
Installing the Power Cable 2-7
3
2-2
CONFIGURATION FOR AN IBM-COMPATIBLE PC
Configuring the 3C882 ISDN Modem for a PC 3-1
Installing the 3C882 Software 3-2
Running the SPID Wizard 3-3
Running the SPID Wizard Again 3-8
Configuring Multilink PPP 3-9
Configuring the B Channel Rate 3-10
Configuring Voice Call Routing 3-10
Verifying the Configuration 3-13
Setup Using Windows 95 3-15
Setup Using Windows NT 3.5.1 RAS 3-17
Setup for Windows NT 4.0 3-20
Configure Dial-Up Networking 3-23
Dial Up Networking for Windows 95 3-23
To configure Dial-Up Networking manually: 3-23
Running the Internet Set-Up Wizard 3-24
Dial-up Networking for Windows NT 4.0 3-26
Setup for 230Kbps 3-30
Setting up 230K for Windows NT 3.5.1 3-30
Setting up 230K for Windows 95 and Windows NT 4.0 3-31
4
CONFIGURATION FOR AN APPLE MACINTOSH
COMPUTER
Configuring the 3C882 ISDN Modem for a Macintosh Computer 4-1
Installing the 3C882 Software 4-2
Running the SPID Wizard 4-3
Configuring Multilink PPP 4-7
Configuring the B Channel Rate 4-8
Configuring Voice Call Routing 4-9
Two Telephone Numbers and Two Analog Devices 4-10
Verifying the Configuration 4-11
Configuring Internet Access for a Macintosh Computer 4-12
Set Up Using OT/PPP and Open Transport 4-12
Set Up Using FreePPP with Open Transport 4-16
5
ADVANCED CONFIGURATION
Advanced Configuration Parameter Default Values
Changing the Parameter Settings 5-4
6
SUPPLEMENTARY VOICE FEATURES
Supplementary Voice Features 6-1
Call Forwarding 6-1
ISDN Call Waiting 6-2
Call Conference 6-3
Call Drop 6-4
Call Transfer 6-4
ISDN Service from Pacific Bell 6-5
5-1
7
PLACING AND RECEIVING CALLS
Placing ISDN Data Calls 7-1
Placing Calls Automatically 7-2
Placing Calls Manually 7-2
Placing Multilink PPP Calls 7-3
Placing a TollMizer Call 7-4
Receiving ISDN Data Calls 7-5
Placing Voice Calls Using an Analog Phone Port 7-6
Receiving Voice Calls Using an Analog Phone Port 7-6
ISDN Call Logging 7-7
TROUBLESHOOTING
Checking the Basics 8-2
Monitoring LEDs 8-2
Monitoring the TEST LED 8-2
Monitoring the D Channel LED 8-3
Monitoring the B Channel LEDs 8-3
Monitoring the SD LED 8-3
Monitoring the RD LED 8-3
Monitoring the DTR LED 8-4
Evaluating Symptoms and Solutions 8-4
Microkey Error Codes 8-8
Restoring the 3C882 ISDN Modem to Autobaud 8-9
Using On-Line Help 8-10
Finding More Information 8-10
Downloading Firmware to Your 3C882 ISDN Modem 8-10
A
ORDERING ISDN SERVICE
Placing the ISDN Order Through 3Com A-1
Placing the ISDN Order Through Your Telephone Company A-1
What Do I Need To Support Supplementary Voice Features? A-3
ISDN Line Parameter Tables A-4
AT&T 5ESS Switch NI1 A-5
AT&T 5ESS Custom Switch A-6
NorthernTelecomDMS 100 Switch A-7
Siemens EWSD Switch A-8
B
AT COMMANDS, S REGISTERS, AND RESULT CODES
AT Command Set B-1
S Registers B-4
Result Codes B-9
C
SPECIFICATIONS
3C882 ISDN Modem Specifications C-1
RS-232 COM Port Pin Specifications C-2
PC Serial Cable Pin Specifications C-3
Macintosh Serial Cable Pin Specifications C-3
D
CONFIGURATION USING DOS
Configuration Using DOS D-1
GLOSSARY
INDEX
LIMITED WARRANTY
3COM END USER SOFTWARE LICENSE AGREEMENT
FCC CLASS B CERTIFICATION STATEMENT
CANADIAN NOTICE
FIGURES
1-1 Network Access with the 3C882 ISDN Modem
1-2 ISDN Information Sheet 1-7
2-1
2-2
2-3
2-4
2-5
2-6
2-7
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
3-11
3-12
3-13
3-14
3-15
3-16
3-17
3-18
3-19
3-20
1-1
Installation Steps for the 3C882 ISDN Modem 2-1
Front Panel LED Indicators 2-2
Back Panel Connectors 2-2
Computer to 3C882 ISDN Modem COM Port Connection
ISDN Cable Connection 2-5
Analog Equipment Connection 2-6
Power Cable Connection 2-7
2-4
Main Configuration Steps for a PC 3-1
Run Dialog Box 3-2
Welcome Screen for PC 3-2
3ComImpact IQ Globe Icon 3-4
SPID Wizard Start Message for PC 3-4
First Telephone Number Dialog Box for PC 3-5
Second Telephone Number Dialog Box for PC 3-6
Successful Configuration Dialog Box 3-6
Configuration Dialog Box for PC 3-7
Voice Call Routing Default Setting 3-11
Configuration for One Telephone Number and Two Devices 3-12
Configuration for Two Telephone Numbers and Two Analog
Devices 3-12
New Hardware Dialog Box 3-15
Install From Disk Dialog Box 3-16
Select Device Dialog Box 3-16
Network Settings Dialog Box 3-18
Remote Access Setup Dialog Box 3-19
Install New Modems Dialog Box 3-21
Modem Manufacturers and Models Dialog Box 3-22
New Phonebook Entry Wizard 3-27
3-21 Phonebook Entry Screen 3-28
3-22 Server Type Screen 3-28
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-19
4-20
3C882 Configuration Steps for a Macintosh 4-1
Installation Message Box 4-2
Successful Installation Message Box 4-3
3ComImpact IQ Program Icon 4-3
Select Modem Port Screen 4-4
SPID Wizard Start Screen 4-4
First Telephone Number Screen for Macintosh 4-5
Second Telephone Screen for Macintosh 4-6
Configuration Dialog Box for Macintosh 4-7
Voice Call Routing Default Setting 4-9
Configuration for One Telephone Number and Two Devices
Configuration to ring both ports simultaneously 4-11
PPP Control Panel 4-13
OT/PPP Modem Control Panel 4-14
TCP/IP Control Panel 4-15
FreePPP Setup Screen 4-16
FreePPP Account Screen 4-17
FreePPP Connection Screen 4-18
FreePPP Modem Setup Screen 4-18
FreePPP TCP/IP Control Panel 4-20
4-10
TABLES
1 Text Conventions
2 Notice Icons 2
2
2-1 Front Panel LED Indicator Definitions
5-1 Changing Default Settings
2-2
5-5
6-1 How to Use Call Waiting 6-2
6-2 How to Use Call Conference 6-3
6-3 How to Use Call Transfer 6-4
8-1 Symptoms, Causes, and Solutions 8-4
8-2 Microkey Error Codes and Their Meaning
A-1
A-2
A-3
A-4
A-5
8-8
Supporting Supplementary Voice Features A-4
Line Configuration for AT&T 5ESS NI1 A-5
Line Configuration for AT&T 5ESS Custom A-6
Line Configuration for DMS 100 A-7
Line Configuration for Siemens EWSD A-8
B-1 AT Command Set Summary B-1
B-2 S Registers B-4
B-3 3C882 ISDN Modem Result Codes B-9
C-1 Pin Descriptions C-2
C-2 PC COM Port Cable Pin Assignments C-3
C-3 Macintosh COM Port Cable Pin Assignments
C-3
ABOUT THIS GUIDE
Introduction
This guide describes how to install, operate, and
troubleshoot the 3ComImpact IQ External ISDN Modem,
referred to throughout this guide as the 3C882 ISDN modem.
Be sure to read the README.TXT or readme files on the
applicable software utility diskette for the latest product
information.
How to Use This Guide
The following table shows where to find specific information
in this guide.
If you are looking for:
Turn to:
General information
Chapter 1
Instructions for installation
Chapter 2
Instructions for configuration for an
Instructions for configuration for a
IBM
or compatible PC
Macintosh
computer
Chapter 3
Chapter 4
Advanced configuration
Chapter 5
Information on supplementary voice features
Chapter 6
Instructions for placing and receiving data and voice calls
Chapter 7
Troubleshooting tips
Chapter 8
Instructions for ordering ISDN service
Appendix A
Tabular summary of the AT command line set, S registers,
and result codes
Appendix B
3C882 ISDN modem specifications
Appendix C
Instructions for configuration using DOS
Appendix D
2
ABOUT THIS GUIDE
Conventions
Table 1 and Table 2 list text and icon conventions that are
used throughout this guide.
Table 1 Text Conventions
Convention
Description
Text represented as
screen display
This typeface is used to represent displays that appear on
your terminal screen, for example:
NetLogin:
Text represented as
commands
This typeface is used to represent commands that you
enter, for example:
SETDefault !0 -IP NETaddr = 0.0.0.0
Keys
When specific keys are referred to in the text, they are called out
by their labels, such as “the Return key” or “the Escape key,” or
they may be shown as [Return] or [Esc].
If two or more keys are to be pressed simultaneously, the keys
are linked with a plus sign (+), for example:
Press [Ctrl]+[Alt]+[Del].
Italics
Italics are used to denote new terms or emphasis.
Table 2 Notice Icons
Icon
Type
Description
Information Note
Information notes call attention to important features
or instructions.
Caution
Cautions contain directions that you must follow to
avoid immediate system damage or loss of data.
Warning
Warnings contain directions that you must follow for
your personal safety. Follow all instructions carefully.
1
INTRODUCTION
The 3ComImpact IQ External ISDN Modem (referred to as the
3C882 ISDN modem throughout this guide) is an external,
stand-alone Integrated Services Digital Network (ISDN) Basic
Rate ISDN modem for connection with digital telephone
services from local telephone companies in North America.
One model (3C882) supports both IBM or IBM-compatible
PCs and Apple Macintosh computers.
The 3C882 ISDN modem is designed for users who require
high-speed access to the Internet, intranet, on-line
information services, or corporate local area networks (LAN).
A typical 3C882 ISDN modem application is shown in
Figure 1-1.
3ComImpact IQ
External ISDN Modem
TM
Internet/intranet
or
on-line service
3 Com
pact
mIm
3Co
DTR
RD
SD
B2
B1
D
PWR
TEST
ISDN line
Public telephone
network
Corporate
LAN
Figure 1-1 Network Access with the 3C882 ISDN Modem
The 3C882 ISDN modem allows transmission of data at
speeds of up to 128 Kbps over digital ISDN connections with
1-2
CHAPTER 1: INTRODUCTION
the highest reliability and error-free performance possible.
With hi/fn compression and a high-speed serial port, the
3C882 ISDN modem allows you to reach transmission speeds
of up to 230.4 Kbps. ISDN technology reduces call setup
times by more than 50% compared to V. fast/V.34 analog
modem setup times; connection is established in 3 seconds.
Setting up the 3C882 ISDN modem takes only 15 minutes.
Simply connect the cables, load the software, run the SPID
Wizard™, and you are ready to place a call.
The 3C882 ISDN modem quickly processes data and voice
calls simultaneously. For example, you can send a fax or place
a voice telephone call while maintaining a high-speed
connection to the office LAN; you can also send or receive a
voice telephone call while you are connected to the Internet.
The 3C882 ISDN modem can be connected to any
compatible UL-listed computer that includes
RS-232-compliant serial ports.
3C882 ISDN Modem Features
The 3C882 ISDN modem provides the following features.
Easy Installation and Use
■
SPID Wizard feature for automatic telephone company switch
and service profile ID (SPID) number configuration
■
Single screen, point-and-click user interface for configuration
■
Autobaud feature for automatic baud rate detection of your
computer’s COM port
■
QuickSelectprotocol detection that automatically senses the
required protocol, either V.120 or PPP, for each data call
■
Automatic configuration verification with on-line registration
■
On-line Help
3C882 ISDN Modem Features
1-3
High Performance
■
hi/fn, version 5, compression, for data throughput of up to
230.4 Kbps, which conforms to these IETF RFC’s: The PPP
Compression Control Protocol (1962), and PPP LZS Compression
Protocol (1974)
■
An asynchronous RS-232-D data port for connectivity to IBM
or compatible PC and Apple Macintosh serial ports at rates of
up to 230.4 Kbps
■
Multilink PPP (RFC 1990), which creates a single digital
network connection of up to 128 Kbps
■
TollMizer, which places a data call over a voice connection,
saving you the additional charge for a data call
■
Support for Shiva’s Proprietary PPP Password Authentication
Protocol (SPAP), versions 2 and 3
Protocols
■
ANSI V.120 rate adaption
■
Async-Sync PPP™ feature, which automatically converts
asynchronous PPP into synchronous (HDLC-based) PPP ISDN
■
IETF PPP (RFC 1661)
■
IETF Multilink PPP
■
ISDN Call Logging
ISDN Standards and Interface
■
A complete digital network termination (Basic Rate
ISDN U interface with built in NT1)
■
Full ISDN signaling support of National ISDN
■
Compatible with AT&T, Northern Telecom, and Siemens
switches
1-4
CHAPTER 1: INTRODUCTION
Security
■
Password Authentication Protocol (PAP) and Challenge
Handshake Authentication Protocol (CHAP) support on both
single-channel and Multilink PPP calls (IETF RFC 1994)
Voice Features
■
Dynamic bandwidth allocation (DBA), which allows you to
place or receive a voice call while a Multilink PPP call is active
■
Two analog voice ports for attaching analog telephone
equipment (touch-tone or cordless telephones, fax and
answering machines, and analog modems) to the ISDN line
■
Flexible call routing to the two analog ports
Upgradability
■
Flash memory for field firmware updates
■
Firmware posted on 3Com’s ftp and BBS sites
Diagnostics
■
LED status display
■
Test call compatibility
Warranty
■
5-year limited warranty
3C882 ISDN Modem Package Contents
The 3C882 ISDN modem package contents contains one
each:
■
3ComImpact IQ External ISDN Modem
■
Power cable with an AC wall transformer
■
RJ -45/RJ -11 ISDN telephone cable
■
25-pin male to 9-pin female serial cable
Before You Install the 3C882 ISDN Modem
1-5
■
3.5-inch installation diskettes for PCs running Windows® 95,
Windows NT®, or Windows 3.x
■
3.5-inch installation diskette for PCs running DOS
■
3.5-inch installation diskette for Macintosh computers
■
3ComImpact IQ External ISDN Modem User Guide
■
3ComImpact IQ External ISDN Modem Quick Start
Instructions
■
RS232 Serial Port Cable
Before You Install the 3C882 ISDN Modem
To install and use the 3C882 ISDN modem successfully, you
must have the following:
■
Correct ISDN service installed at your location with an
available ISDN RJ-11 outlet. If you have not ordered ISDN
service yet, see Appendix A.
■
ISDN configuration information. Complete the ISDN
Information Sheet in the “ISDN Information” section of this
chapter.
■
A computer that meets UL standards in the United States or
is certified to CSA standards in Canada. Refer to the section
“IBM PC or Compatible Requirements” for an IBM or
IBM-compatible PC. Refer to the section “Apple Macintosh
Requirements” for an Apple Macintosh computer.
■
For Macintosh users, one 25-pin male to mini DIN 8-pin male
serial cable.
To order a free Macintosh serial cable, refer to the information
enclosed in your 3C882 ISDN modem package. If you are
supplying your own serial cable, ensure that it meets the pin
specifications provided in Appendix C.
1-6
CHAPTER 1: INTRODUCTION
IBM PC or Compatible Requirements
An IBM-compatible PC must have the following:
■
■
A 386, 486, or Pentium processor
Microsoft Windows 95, Windows NT, or Windows 3.x,
MS-DOS, or IBM PC DOS 3.x or higher
■
640 KB of conventional memory
■
A hard disk drive with 4 MB of free space
■
A high-density 3.5-inch floppy diskette drive
■
VGA or compatible video graphics adapter and monitor
(color recommended)
■
An available serial communications port
For 230.4 Kbps data rate. You will need an enhanced serial
port card and COM port driver software that support
230.4 Kbps.
For 115.2 Kbps data rate. 3Com recommends that
your IBM or IBM-compatible PC serial COM port be
equipped with a 16C550 UART (universal asynchronous
receiver/transmitter). To determine what UART is installed in
your PC, run the Microsoft Diagnostic Program (msd) from
the DOS prompt.
Apple Macintosh Requirements
An Apple Macintosh computer must have the following:
■
An available serial communications port
■
System 7 or later operating system
■
A hard disk drive with 4 MB of free space
■
A high-density 3.5-inch floppy diskette drive
Before You Install the 3C882 ISDN Modem
1-7
ISDN Information
Enter your ISDN telephone number(s) in the information
sheet shown in Figure 1-2. You will need this information
during configuration of the 3C882 ISDN modem.
Although the 3C882 ISDN modem automatically configures
the ISDN switch type and Service Profile Identifier (SPID)
number(s), you should indicate the switch type and SPID(s), if
any were assigned. You may need to refer to this information
for technical support.
If necessary, ask your telephone company ISDN
representative for the ISDN information.
ISDN Information Sheet
3ComImpact IQ ISDN Modem
ISDN Switch Type
AT&T 5ESS NI1
❒
AT&T 5ESS Custom
❒
Northern Telecom DMS 100
❒
Siemens EWSD
❒
Number of Telephone Numbers (1 or 2) ______
Phone #1______________________________
SPID # for Phone #1______________________
Phone #2______________________________
SPID # for Phone #2______________________
Figure 1-2 ISDN Information Sheet
ISDN Switch Type. Place a check mark next to the ISDN
switch your telephone company uses. Each switch type has a
corresponding provisioning table in Appendix A.
Number of ISDN Telephone Numbers. Your one ISDN
telephone line can support two ISDN telephone numbers. If
1-8
CHAPTER 1: INTRODUCTION
you ordered one ISDN telephone number, write 1. If you
ordered two ISDN telephone numbers, write 2.
Ordering two ISDN telephone numbers allows you to conduct
two simultaneous calls on both analog phone ports.
ISDN Telephone Number 1. Write down your ISDN
telephone number provided to you by the telephone
company ISDN representative.
ISDN Telephone Number 2. Write the second ISDN phone
number if you ordered two ISDN telephone numbers for your
line.
SPID Number. If required by your telephone company, fill in
the SPID number for each ISDN phone number. Your
telephone company can tell you whether a SPID is required
and supply you with the correct value.
2
INSTALLING THE 3C882
ISDN MODEM
This chapter describes installation of the 3C882 ISDN modem
for use with an IBM or IBM-compatible PC or an Apple
Macintosh computer.
This installation procedure assumes that you are familiar with
your Apple Macintosh or IBM-compatible computer. If you
are not, refer to the user guide that accompanied your
computer for instructions on hardware installation and
operating system commands.
The main hardware installation steps are depicted in
Figure 2-1.
Familiarize yourself
with the
3C882 ISDN modem
Connect serial cable
Install ISDN cable
Install analog
equipment
(optional)
Install power cable
Figure 2-1 Installation Steps for the 3C882 ISDN Modem
2-2
CHAPTER 2: INSTALLING THE 3C882 ISDN MODEM
Familiarizing Yourself with the 3C882 ISDN Modem
You should familiarize yourself with the components of the
front panel and back panel of the 3C882 ISDN modem prior
to installation.
The LED status display, shown in Figure 2-2, consists of eight
front panel LEDs that are described in Table 2-1.
3 Com
TM
PWR TEST D
B1
B2
SD
RD
3ComImpact IQ
DTR
Figure 2-2 Front Panel LED Indicators
Figure 2-3 shows the back panel.
9 VDC
.6A MAX
RESET
1
2
RS-232
ISDN U
Figure 2-3 Back Panel Connectors
Table 2-1 Front Panel LED Indicator Definitions
LED
Color
Description
PWR
Green
Power Indicator. Lit when power is on and remains lit as long
as power is supplied to the unit.
TEST
Green
Self-Test/Status. Flashes when the 3C882 ISDN modem is
executing its power-up self-test or a user-initiated reset. If the
results of the self-test or reset are normal, the LED goes off. If
the result of the self-test is abnormal and a fault is detected,
the LED remains lit but does not flash.
Installing a Serial Cable
LED
Color
Description
D
Green
D Channel Status. Indicates the ISDN physical network
interface and D channel status:
2-3
Goes off once the physical and D channel signaling are
synchronized.
Flashes if the physical interface establishes synchronization
and the ISDN D channel signaling procedures are not properly
established.
Remains lit if the physical ISDN interface is not synchronized or
is disconnected.
B1
Amber
or
green
B1 Channel Activity. Green indicates a circuit-switched data
call in progress. Amber indicates a circuit-switched voice call in
progress. If a call is in a dialing state, the LED flashes. When the
call is disconnected, the LED goes off.
B2
Amber
or
green
B2 Channel Activity. Green indicates a circuit-switched data
call in progress. Amber indicates a circuit-switched voice call in
progress. If a call is in a dialing state, the LED flashes. When the
call is disconnected, the LED goes off.
SD
Green
Send Data. Indicates that information is being transmitted
over the serial data port from the computer to the ISDN
modem.
RD
Green
Receive Data. Indicates that information is being transmitted
over the serial data port to the computer from the ISDN
modem.
DTR
Green
Data Terminal Ready. Indicates that communication between
the ISDN modem and computer has been established.
Installing a Serial Cable
You will need the following type of serial cable.
■
For a Macintosh computer, you will need a 25-pin male to
mini DIN 8-pin male serial cable. Refer to the information
enclosed in your 3C882 ISDN modem package to order a free
cable. If you are providing your own serial cable, ensure that
it meets the pin specifications provided in Appendix C.
■
For a PC, you will need the 25-pin male to 9-pin female serial
cable that was provided. For PCs with a 25-pin serial port
connector, you will need to purchase a standard 9-pin to
25-pin adapter.
2-4
CHAPTER 2: INSTALLING THE 3C882 ISDN MODEM
To install the 3C882 ISDN modem serial cable:
1 Insert the 25-pin male end of a serial signal cable into the
RS-232 serial port on the 3C882 ISDN modem’s back panel
and tighten the connector screws, as shown in Figure 2-4.
2
-23
RS
NU
ISD
2
T
1
SE
RE
DC
9V
X
MA
.5A
Figure 2-4 Computer to 3C882 ISDN Modem COM Port Connection
2 Connect the other end of the serial cable to a serial COM
port on the back of your computer and tighten the
connector screws.
On a PC, most COM port connectors are labeled COM,
SERIAL, or RS-232-D. On an IBM AT® PC and most laptops or
notebooks, connect the cable to a 9-pin COM port connector.
If your PC has a 25-pin serial port connector, you will need to
install a standard 9-pin to 25-pin adapter.
On a Macintosh computer, the COM port is the mini DIN
8-pin serial connector depicted by the telephone handset.
Installing the ISDN Cable
1Installing
2-5
the ISDN Cable
To install the ISDN cable:
1 Connect the RJ-45 (8-pin) connector end of the
RJ-45/RJ-11 ISDN cable to the RJ-45 ISDN line port labeled
ISDN U on the 3C882 ISDN modem’s back panel, as shown
in Figure 2-5.
2
-23
RS
NU
ISD
2
T
1
SE
RE
DC
9V
X
MA
. 5A
Figure 2-5 ISDN Cable Connection
2 Connect the RJ-11 (6-pin) connector end of the
RJ-45/RJ-11 ISDN cable to the RJ-11 ISDN wall jack.
CAUTION: An NT1 is built into the 3C882 ISDN modem.
Never connect the 3C882 ISDN modem ISDN port to a
standard analog telephone jack or to an external NT1 device.
Make sure that it is connected directly to the ISDN jack.
Installing Analog Equipment
You can connect an analog touch-tone telephone, answering
machine, fax machine, or external analog modem to the
3C882 ISDN modem.
You will need an RJ-11 to RJ-11 cable for each analog phone
port connection.
To install an analog device:
1.
2-6
CHAPTER 2: INSTALLING THE 3C882 ISDN MODEM
1 Insert one RJ-11 connector to a phone port labeled with a
telephone icon on the back of the ISDN modem, as shown
in Figure 2-6.
2
-23
RS
NU
ISD
2
ET
1
S
RE
DC
9V
X
MA
.5A
Figure 2-6 Analog Equipment Connection
2 Insert the other RJ-11 end into the appropriate RJ-11 port
on the analog device.
3 If you have another analog device to install, repeat steps 1
and 2.
CAUTION: The 3C882 ISDN modem is designed to operate
with telephones that are compatible with the original AT&T®
2500 touch-tone telephone standard. 3Com guarantees
proper operation of compatible touch-tone devices that do
not exceed a total ringer equivalency number (REN) of three
per analog port. The 3C882 ISDN modem is designed to
provide power and ringing for these three devices on up to
200 feet of AWG 26 or heavier AWG wiring. Although the
3C882 ISDN modem may function satisfactorily at longer
cable distances with more than two attached telephones,
proper operation at longer cable distances is not guaranteed
in all situations.
Installing the Power Cable
2-7
Specialized telephone equipment such as speaker phones
that draw large amounts of power may not work on the
3C882 ISDN modem’s Phone port. Because these devices do
not conform to the power specification of the 2500
touch-tone telephone standard, their operation is not
guaranteed.
Installing the Power Cable
To install the power cable:
1 Connect the 3C882 ISDN modem power cable to the
9 VDC power connector on the back panel of the ISDN
modem, as shown in Figure 2-7.
2
-23
RS
NU
ISD
2
T
1
SE
RE
DC
9V
X
MA
.5A
Figure 2-7 Power Cable Connection
2 Plug the transformer end of the power cable into a surgeprotected standard 110 VAC wall outlet.
The indicator LEDs on the front panel (see Figure 2-2) flash
momentarily as the unit undergoes a power-up self-test
diagnostic.
2-8
CHAPTER 2: INSTALLING THE 3C882 ISDN MODEM
This completes the 3C882 ISDN modem installation.
Refer to the appropriate chapter to configure the 3C882 ISDN
modem; either Chapter 3, “Configuration for an
IBM-Compatible PC Running Windows,”or Chapter 4,
“Configuration for an Apple Macintosh Computer.”
3
CONFIGURATION FOR AN
IBM-COMPATIBLE PC
RUNNING WINDOWS
This chapter describes the 3C882 ISDN modem configuration
for use with the Windows operating system. Main topics are
as follows:
■
Configuring the 3C882 ISDN modem
■
Setup using Windows 95
■
Setup using Windows NT 3.5.1
■
Setup using Windows NT 4.0
■
Configuring Dial-Up Networking
■
Setup for 230Kbps
For instructions on using the DOS operating system, refer to
Appendix D.
Configuring the 3C882 ISDN Modem for a PC
The main steps are shown in Figure 3-1.
Install 3C882
software
Run
SPID Wizard
Configure
Multilink PPP,
B channel rate, &
voice call routing
Verify
configuration
Figure 3-1 Main Configuration Steps for a PC
3-2
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
Installing the 3C882 Software
To install the 3C882 ISDN modem software:
1 Insert the 3ComImpact IQ Windows Installation Diagnostic
Utilities diskette into an available floppy drive.
2 If you are using Windows 95, select Run from the Start
menu. If you are using Windows 3.x, select Run from the File
menu. In the Run dialog box shown in Figure 3-2, type:
a:\setup
Figure 3-2 Run Dialog Box
3 Click OK.
After the configuration program is copied to the hard disk, a
welcome screen opens, as shown in figure Figure 3-3.
Figure 3-3 Welcome Screen for PC
Configuring the 3C882 ISDN Modem for a PC
3-3
4 Click Next to continue the installation.
You will then be prompted to choose the directory in which
to install the software.
5 If you would like to designate a directory other than the
default directory, click Browse to do so. Otherwise, click
Next to install the 3ComImpact IQ into the default
directory.
If you are running Windows 3.x, a message box appears and
asks you whether you want to install a Microkey COM port
enhancement driver for data transfer rates up to 115.2 Kbps.
This driver will replace your existing COM port driver. If you
receive the following message during the Microkey
installation procedure:
ERROR DURING INSTALLATION, ERROR CODE XX
please record the error code (shown as XX above) and refer to
“” on page 8-7 for an explanation of the error code and the
corrective action to take.
After the setup program has completed installation, you are
asked to view the Readme file.
6 Click Yes to review this file.
You may choose File and Print to create a hardcopy of the
Readme. Otherwise, read the file and exit. A message box
confirms that the installation is complete.
7 Click OK to complete the installation.
Running the SPID Wizard
The SPID Wizard automatically detects your telephone
company’s switch type and configures the SPID(s).
You will need the ISDN telephone numbers from the ISDN
Information Sheet you completed in Chapter 1.
3-4
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
1 Double-click the 3ComImpact IQ icon shown in Figure 3-4.
Figure 3-4 3ComImpact IQ Globe Icon
You will see a start message, as shown in Figure 3-5.
Figure 3-5 SPID Wizard Start Message for PC
If you do not want to run the SPID Wizard, click Cancel to
configure your values manually via the configuration dialog
box (see Figure 3-9). Here you can select your ISDN switch
type, enter the telephone number(s) and, if required, enter the
corresponding SPID(s) for your ISDN line. Note that running
the SPID Wizard is the recommended method for configuring
your SPID values.
The SPID Wizard first checks for ISDN layer 1status, and then
configures the switch type.
Configuring the 3C882 ISDN Modem for a PC
3-5
After the switch type is configured, the dialog box for the
first telephone number appears, as shown in Figure 3-6.
Figure 3-6 First Telephone Number Dialog Box for PC
2 Enter the first telephone number for your ISDN line.
3 Click Next.
A message appears, indicating that the 3C882 ISDN modem
is detecting the SPID for the first telephone number.
3-6
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
After the SPID is configured, the dialog box shown in
Figure 3-7 appears.
Figure 3-7 Second Telephone Number Dialog Box for PC
4 If you have a second telephone number for your ISDN line,
enter it, and then click Next. If not, leave the field
incomplete, and then click Done.
After successful configuration of your switch type and SPID
number(s), Figure 3-8 appears.
Figure 3-8 Successful Configuration Dialog Box
Configuring the 3C882 ISDN Modem for a PC
3-7
5 Click Finish.
The on-line registration dialog box appears. Enter your
information and then click Register Now.
After your information is received, the Successful Registration
dialog box will open.
6 Click OK.
A message box indicates that you have correctly configured
your 3C882 ISDN modem.
7 Click No to verify your settings and continue the setup
procedure (recommended). To exit the installation
program and leave the default settings, click Yes.
If you clicked No, the Configuration dialog box will open, as
shown in Figure 3-9.
Figure 3-9 Configuration Dialog Box for PC
3-8
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
A message bar at the bottom of the dialog box provides status
information about the 3C882 ISDN modem.
The Configuration dialog box buttons do the following.
Help. Click the Help button to access help for the
Configuration dialog box. There is also comprehensive
on-line help accessible from the 3ComImpact IQ program
group box.
Tools. Clicking on the Tools button produces buttons for
Firmware, Tests, Save and Restore.
■
■
■
■
Firmware. Refer to the readme file for firmware download
instructions.
Tests. Use the Tests tool only under the direction of
technical support personnel.
Save. Pressing the Save button saves the current
Configuration dialog box settings in a file you name. You
can easily restore a previously saved file to the
Configuration dialog box.
Restore. Pressing the Restore button restores the 3C882
ISDN modem to a previously saved configuration file.
Update. Click the Update button to download any
configuration parameter changes made to the Configuration
dialog box. After you click the Update button, the name
changes to Updated to indicate that the changes have been
saved to your ISDN modem’s S registers.
Exit. Click Exit to leave the Configuration dialog box.
Running the SPID Wizard Again
The SPID Wizard automatically runs when you are
configuring the 3C882 ISDN modem for the first time, if you
connect the 3C882 ISDN modem to a different ISDN line, or if
your ISDN line parameters should change (e.g., your area
code). After the ISDN switch type, telephone number(s), and
Configuring the 3C882 ISDN Modem for a PC
3-9
SPID(s) are configured, clicking on the 3ComImpact IQ globe
icon will thereafter display the Configuration dialog box.
If you add a second telephone number to your ISDN line
after you run the SPID Wizard, you can use the SPID Wizard to
detect the SPID for your second telephone number.
To run the SPID Wizard for a second telephone number:
1 From the Configuration dialog box, check the Enabled box
located in the Number 2 group box.
A message box appears and asks you to confirm that you
want to run SPID Wizard.
2 Click OK.
The Second Telephone Number dialog box appears.
3 Enter the second telephone number for your ISDN line
and then click Next.
Figure 3-8 appears.
4 Click Finish.
Configuring Multilink PPP
Multilink PPP is a protocol that provides a method for
combining multiple PPP connections. Multilink PPP combines
the two ISDN B channels, creating a virtual single digital
connection of up to 128 Kbps. Note that the destination you
are dialing must also support Multilink PPP, or you will get a
single B channel connection instead of the dual-channel link.
By default, Multilink PPP is enabled. To enable or disable
Multilink PPP, do the following:
1 Click inside the Multilink check box in the PPP area to
clear it (disable) or check it (enable).
2 Click the Update button to download the change to your
3C882 ISDN modem’s S register.
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CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
Additional configuration may be needed for Multilink PPP. For
details refer to S registers 82 and 83 in Appendix B, “AT
Commands, S Registers, and Result Codes”.
Note that if you disable Multilink PPP (i.e., Register S80=0),
you can still place a Multilink PPP call without changing the
S 80 register value. In the dial string, enter the first telephone
number, then the ampersand character followed by the
second telephone number. For example:
ATD 908 555 1212 & 908 555 1213
Configuring the B Channel Rate
Specify the B channel rate as 56 Kbps, 64 Kbps, or select
TollMizer if you would like to use that feature. TollMizer
allows you to place a 56 Kbps data call using a voice channel,
which is often less expensive. Note that the device you are
calling must also support TollMizer (sometimes referred to as
Switch 56 Permissive or Data Over Voice) to take advantage
of this feature.
By default, the B channel rate is 56 Kbps. Check with your
telephone company for the appropriate B channel rate.
To change the connection speed to 64 Kbps or TollMizer, do
the following:
1 Select the appropriate radio button (64 Kbps or TollMizer).
2 Click the Update button to download the change to your
3C882 ISDN modem’s S register.
Configuring Voice Call Routing
The 3C882 ISDN modem allows you to assign a specific
telephone number to a specified analog phone port. By
default, telephone number 1 is assigned to phone port one,
and telephone number 2 is assigned to phone port two, as
shown in Figure 3-10. This is especially helpful should you
Configuring the 3C882 ISDN Modem for a PC
3-11
have both a telephone and a fax machine connected to your
3C882 ISDN modem’s analog ports.
232
RS-
NU
ISD
2
1
ET
RES
C
9 VD
X
MA
• 5A
908 555 1212
908 555 1213
Figure 3-10 Voice Call Routing Default Setting
Note the phone port check marks for each telephone
number. This default configuration routes each telephone
number to a specified port.
The ISDN Call Waiting default configuration is best served by
the recommended scenario shown in Figure 3-10. By default,
ISDN Call Waiting has been enabled on Phone Port 1, for use
with your telephone, but disabled on Phone Port 2 to prevent
potential interruption of calls to your fax machine (S76=1).
One Telephone Number and Two Analog Devices.
If you have only one telephone number for your ISDN line
and two analog devices, check the Phone Port 1 and Phone
Port 2 boxes located in the Number 1 group box, as shown in
Figure 3-11. Calls to that telephone number will ring both
devices, allowing you to answer a call using either device.
3-12
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
Note that while you are using the fax machine, for example,
you cannot use the telephone to place or receive calls
because your ISDN line has only one telephone number.
NU
ISD
232
RS-
2
1
ET
RES
C
9 VD
X
MA
• 5A
908 555 1212
908 555 1212
Figure 3-11 Configuration for One Telephone Number and Two
Devices
Two Telephone Numbers and Two Analog Devices.
If you have two telephone numbers and two analog devices
attached to your 3C882 modem, you can choose to have
both ISDN telephone numbers ring both devices
simultaneously. For this scenario, you would place a
checkmark in all four Phone Port boxes, as shown in
Figure 3-12
-232
RS
NU
ISD
2
T
1
SE
RE
DC
9V
X
MA
• 5A
908 555 1212
908 555 1213
908 555 1212
908 555 1213
Figure 3-12 Configuration for Two Telephone Numbers and Two
Analog Devices
Configuring the 3C882 ISDN Modem for a PC
3-13
To change the voice call routing setting:
1 Specify which Phone port should handle the calls
associated with Telephone Number 1 by checking the
appropriate Phone Port box.
2 If your ISDN line has two telephone numbers, specify
which Phone port should handle the calls associated with
Telephone Number 2.
3 Click the Update button to download the change to your
3C882 ISDN modem’s S register.
Verifying the Configuration
Check the status bar located toward the bottom of the
Configuration dialog box. If the parameters were configured
accurately and the 3C882 ISDN modem is ready to send and
receive calls, the status bar fields will appear as shown here.
■
Layer 1: UP
■
SPID 1: Init (if required)
■
TEI 1: Number from 64 to 126
■
SPID 2: Init (if required)
■
TEI 2: Number from 64 to 126 (if required)
The TEI number(s) are not configured by the user. The TEI
number(s) are transmitted by the telephone company for
informational purposes only.
Before you close the Configuration dialog box, do the
following.
1 Confirm that the Configuration parameters are correct.
3-14
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
2 Click the Update button if you made any changes to the
3C882 ISDN modem configuration.
3 Click Exit to leave the utility.
This completes the ISDN modem configuration procedure.
For Windows 3.x users, go to Chapter 5, “Advanced
Configuration,” and review the default settings to ensure that
they reflect your preferences. If you prefer not to change the
default settings, go on to Chapter 7, “Placing and Receiving
Calls”.
If you are using Windows 95, Windows NT 3.5.1, or Windows
NT 4.0, refer to the appropriate section, “Setup Using
Windows 95”, “Setup Using Windows NT 3.5.1 RAS”, or “Setup
for Windows NT 4.0” for additional instructions.
For information regarding configuration of the 3C882 ISDN
modem with various Internet access software not included in
this User Guide, use the 3Com fax service (1) (408) 727-7021
(analog) in the U.S. or visit 3Com’s World Wide Web site at
http://www.3Com.com/.
Setup Using Windows 95
3-15
Setup Using Windows 95
This section describes how to set up the 3C882 ISDN modem
using Windows 95 Plug and Play. These instructions assume
that Windows 95, Microsoft Plus!, and the 3C882 ISDN
modem software have already been installed.
To setup your 3C882 ISDN manually and bypass Windows 95
Plug and Play, refer to the section “Setup for Windows NT 4.0”
below.
1 Reboot your PC with the 3C882 ISDN modem powered up
and physically connected to your PC.
The New Hardware dialog box appears, shown in Figure 3-13.
Figure 3-13 New Hardware Dialog Box
2 Select the Driver from disk provided by hardware
manufacturer option.
3 Click OK.
3-16
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
The Install From Disk dialog box appears, as shown in
Figure 3-14.
Figure 3-14 Install From Disk Dialog Box
4 Insert the 3ComImpact IQ Windows Installation Diagnostic
Utilities diskette into an available floppy drive.
5 Click OK.
The Select Device dialog box appears, as shown in
Figure 3-15.
Figure 3-15 Select Device Dialog Box
Setup Using Windows NT 3.5.1 RAS
3-17
6 Check Show All Devices.
7 Select 3ComImpact IQ for baud rates of up to 115.2Kbps
and click Next.
The 3C882 ISDN modem allows for transfer rates of up to
230.4 Kbps. However, some computers require the installation
of additional hardware, such as an accelerated serial port
card, to take advantage of this higher speed. Additional
configuration steps, as well, are required. Refer to “Setup for
230Kbps” for instructions.
8 Click OK.
This completes the setup procedure for Windows 95. Refer to
“Configure Dial-Up Networking” to setup a remote access
configuration, or continue on to Chapter 5, “Advanced
Configuration,” to review the default settings and ensure that
they reflect your preferences. If you prefer not to change the
default settings, then go on to Chapter 7, “Placing and
Receiving Calls”.
Setup Using Windows NT 3.5.1 RAS
This section describes how to set up the 3C882 ISDN modem
using Windows NT RAS version 3.5.1. Note that these
instructions assume that the 3C882 ISDN modem software
has already been installed.
1 Using the File Manager, locate the Windows NT
MODEM.INF file in the %SystemRoot%/System32/RAS
directory and rename it MODEM.ORG.
For example, if your root directory is Windows, you would
look for the Windows NT MODEM.INF file in the following
directory:
C:\windows\System32\RAS
3-18
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
2 Copy the 3C882 ISDN modem MODEM.INF file to the same
directory as the MODEM.ORG file.
3 From the main menu, select Control Panel, and then select
Network.
The Network Settings dialog box appears, as shown in
Figure 3-16.
Figure 3-16 Network Settings Dialog Box
4 From the Installed Network Software list box, select
Remote Access Service and then click Configure.
Setup Using Windows NT 3.5.1 RAS
3-19
The Remote Access Setup dialog box appears, as shown in
Figure 3-17.
Figure 3-17 Remote Access Setup Dialog Box
5 If a modem is already configured, select it, and then click
Remove.
6 Click Add.
The Add Port dialog box appears.
7 Select a COM port, and then click OK.
The Remote Access Setup message box appears.
8 Click Cancel.
The Configure Port dialog box appears.
9 Select 3ComImpact IQ for baud rates up to 115.2 Kbps and
then specify the port usage. Click OK.
The 3C882 ISDN modem allows for transfer rates of up to
230.4 Kbps. However, some computers require the installation
of additional hardware, such as an accelerated serial port
card, to take advantage of this higher speed. Additional
configuration steps, as well, are required. Refer to “Setup for
230Kbps” for instructions.
The Remote Access Setup dialog box appears.
3-20
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
10 Click Continue.
11 Click OK to exit the Network Settings dialog box.
The Network Settings Change alert box appears.
12 Click Restart Now.
Once your computer has rebooted, you are ready to use the
3C882 ISDN modem.
Refer to Chapter 5, “Advanced Configuration,” to review the
default settings and ensure that they reflect your preferences.
If you prefer not to change the default settings, then go on
to Chapter 7, “Placing and Receiving Calls”.
Setup for Windows NT 4.0
This section describes how to set up the 3C882 ISDN modem
using Windows NT 4.0. Note that these instructions assume
that the 3C882 ISDN modem software has already been
installed.
These instructions also apply for Windows 95 manual setup.
1 Insert the 3ComImpact IQ Windows Installation Diagnostic
Utilities diskette into an available floppy drive.
2 From the Control Panel dialog box, double-click the
Modems icon.
The Modems Properties dialog box appears.
3 Click Add.
The Install New Modem dialog box appears, as shown in
Figure 3-18.
Setup for Windows NT 4.0
3-21
Figure 3-18 Install New Modems Dialog Box
4 Check Don’t detect my modem, I will select it from a list and
click Next.
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CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
The New Modem Manufacture screen will open, as shown in
Figure 3-19.
Figure 3-19 Modem Manufacturers and Models Dialog Box
You will only see a 3Com entry if you have previously installed
a 3Com modem.
5 Click Have Disk.
6 Select 3ComImpact IQ for baud rates of up to 115.2K and
click Next.
The 3C882 ISDN modem allows for transfer rates of up to
230.4 Kbps. However, some computers require the installation
of additional hardware, such as an accelerated serial port
card, to take advantage of this higher speed. Additional
configuration steps, as well, are required. Refer to “Setup for
230Kbps” for instructions.
7 Select the appropriate COM port to which your modem is
connected.
8 Click Next.
Configure Dial-Up Networking
3-23
A dialog box indicates successful setup.
9 Click Finish.
This completes the setup procedure for Windows NT 4.0.
Refer to “Configure Dial-Up Networking” below to setup a
remote access configuration, or continue on to Chapter 5,
“Advanced Configuration,” to review the default settings and
ensure that they reflect your preferences. If you prefer not to
change the default settings, then go on to Chapter 7, “Placing
and Receiving Calls”.
Configure Dial-Up Networking
This section describes the Dial-Up Networking setup
procedure for both Windows 95 and Windows NT 4.0
Dial-Up Networking setup requires specific Internet Service
Provider (ISP) information; your particular setup parameters
may vary widely. You may need to check with your ISP for
assistance.
Dial Up Networking for Windows 95
If you would like to connect to the Internet, you can choose
to have the Internet Setup Wizard to guide you through the
procedure or you may choose to configure Dial-Up
Networking manually for other remote connections.
To configure Dial-Up Networking manually:
1 From the Start menu, select Programs, Accessories, and
Dial-Up Networking.
The Dial-Up Networking window opens.
2 Double click the Make New Connection icon.
3 Enter a name for this connection (such as your ISP).
4 Select 3ComImpact IQ for baud rates up to 115.2 Kbps.
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CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
If you have not already set up the modem for 230K, refer to
“Setup for 230Kbps” for assistance.
5 Click Configure.
The 3ComImpact IQ Properties window opens.
6 Select the appropriate COM port and maximum speed
available for your computer.
7 Click OK.
You are returned to the Make New Connection screen.
8 Click Next.
Enter the area code, telephone number and (if necessary) the
country code of the location you are dialing.
9 Click Next.
10 Click Finish.
To make a call, double click the connection icon for the
destination you wish to access. A connection dialog box will
open.
11 Click Connect.
Once your call has been established, you may open any web
browser to access the Internet.
Running the Internet Set-Up Wizard
The Internet Set-Up Wizard automates the configuration
procedure for connecting to the Internet. You will need the
following information, which your Internet Service Provider
(ISP) should supply:
■
Name of you ISP
■
Your ISP access number
■
Your user name and password
■
IP Address (if required)
Configure Dial-Up Networking
■
Subnet Mask (if required)
■
Primary and Alternate DNS Server address
3-25
To send and receive e-mail through the Internet:
■
E-mail address
■
Mail server address
To run the Internet Set-Up Wizard, do the following:
The Internet Set-Up Wizard procedure may vary depending on
your particular version of Windows 95.
1 Click Start, Programs, Accessories, Internet Tools, and
Internet Setup Wizard.
2 Click Next to view the Connection Type dialog box.
3 Select Connect Using My Phone Line. Click Next to view the
Connection Type dialog box.
4 Choose to “Connect to the Internet using an Internet
Service Provider”.
5 Click Next.
If this is the first time you are running the Internet Setup
Wizard, the Installing Files dialog box appears.
6 Click Next.
The Choose Modem dialog box opens.
7 Select 3ComImpact IQ for baud rates of up to 115.2 Kbps
or 3ComImpact IQ 230K if you have installed an
accelerated serial port for higher baud rates. You must
have already followed specific setup instructions for
operating at 230K.
If you have not already set up the modem for 230K, refer to
“Setup for 230Kbps” for assistance.
8 Click Next.
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CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
The Service Provider dialog box opens.
9 Enter the name of your ISP and click Next.
The Phone number dialog box opens.
10 Enter the area code, telephone number and (if necessary) the
country code of the location you are dialing.
11 Click Next.
The User Name and Password dialog box will open.
12 Enter your user name and password and click Next.
13 Configure as specified by your ISP and click Next.
14 Enter the IP address of your DNS server and click Next.
15 Choose the appropriate box to send and receive email
through the Internet. Then enter your email address (e.g.,
username@isp.com) and your Internet mail server address.
16 Click Next and Finish to exit the Internet Setup Wizard.
This completes the setup procedure for the Internet Setup
Wizard. Refer to Chapter 5, “Advanced Configuration,” to
review the default settings and ensure that they reflect your
preferences. If you prefer not to change the default settings,
then go on to Chapter 7, “Placing and Receiving Calls”.
Dial-up Networking for Windows NT 4.0
To configure Dial-Up Networking for Windows NT 4.0, follow
these instructions.
1 Click Start, Programs, Accessories, and Dial-Up-Networking.
Click New to create a new connection.
Configure Dial-Up Networking
3-27
The New Phonebook Entry screen opens, as shown in
Figure 3-20.
Figure 3-20 New Phonebook Entry Wizard
If you have not yet configured a Dial-Up Networking
connection, a message will indicate that your phonebook is
empty. Click OK to add an entry.
2 Type a name for your connection, and click Next.
3 Select “I’m calling the Internet” and click Next.
4 Enter your ISP’s ISDN access number, and click Next.
5 Click Finish to close the New Phonebook Entry Wizard.
The Phonebook entry screen opens, as shown in Figure 3-21.
3-28
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
Figure 3-21 Phonebook Entry Screen
You now have an opportunity to verify various settings of
your Dial-Up Networking connection.
6 Click More, and select “Edit entry and modem properties”.
Verify your ISP’s ISDN access number and your modem
selection.
7 Click the Server tab. The Server Type screen opens, as
shown in Figure 3-22.
Figure 3-22 Server Type Screen
Configure Dial-Up Networking
3-29
8 Choose “PPP: Windows NT, Windows 95 Plus, Internet”
from the Dial-up server type drop down box.
9 Check TCP/IP if you are dialing into an ISP for Internet
access.
If you are accessing a remote network, such as a corporate
LAN, check with your MIS network administrator for the
appropriate Network Protocols.
10 Click the TCP/IP Settings button.
In most cases your ISP will provide a dynamic IP address; if so
check “Server assigned IP address”. Enter your DNS and WINS
server addresses if required.
If your ISP has assigned you a dedicated IP address, click
“Specify an IP Address” and enter it here.
11 Click OK to return to the Phonebook Entry screen.
12 Click the Script tab. Set Script to None unless otherwise
specified by your ISP.
13 Click the Security tab.
Change the Authentication method to “Accept any
authentication, including clear text” for PAP authentication or
“Accept Only Encrypted Authentication” for CHAP.
14 Click OK.
The 3C882 ISDN modem does not support Microsoft
Encrypted Authentication. X.25 is not supported either;
therefore, no changes are required on the X.25 screen.
This completes the Dial-Up Networking setup procedure for
Windows NT 4.0. Refer to Chapter 5, “Advanced
Configuration,” to review the default settings and ensure that
they reflect your preferences. If you prefer not to change the
default settings, then go on to Chapter 7, “Placing and
Receiving Calls”.
3-30
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
Setup for 230Kbps
The 3C882 ISDN modem allows for transfer rates of up to
230.4 Kbps. Note that some computers require the
installation of additional hardware, such as an accelerated
serial port card, to take advantage of this higher speed.
There are two setup scenarios covered:
■
230K setup for Windows NT 3.5.1
■
230K setup for Windows 95 and Windows NT 4.0
Setting up 230K for Windows NT 3.5.1
These instructions require prior installation of the modem.inf
driver, which is installed as part of the initial setup procedure.
Refer to “Setup Using Windows NT 3.5.1 RAS” earlier in this
chapter for assistance.
1 Ensure that your computer’s COM port and
communications software support 230.4 Kbps.
For instructions on sending AT commands, refer to the section
“Changing the Parameter Settings” on page 5-4.
2 Using terminal emulation software send the command AT
$B 230400 to the 3C882 ISDN modem. This will set the
baud rate to 230.4 Kbps.
Once the baud rate is set to a fixed amount you will no longer
be able to access the Configuration dialog box to make
changes. Refer to “Restoring the 3C882 ISDN Modem to
Autobaud” on page 8-9 for assistance.
3 Save this setting by entering AT&W and press return.
Next you must install the 230K driver to take advantage of
the speed increase.
Setup for 230Kbps
3-31
4 From the Main menu, select Control Panel, then select
Network.
The Network Settings dialog box appears.
5 Click Configure.
The Remote Access Setup dialog box appears.
6 Click Configure.
7 Select 3ComImpact IQ 230K.
8 Click OK.
9 Change the setting of your application program to 230400
bps.
This completes the procedure to change the baud rate to
230.4 Kbps for Windows NT 3.5.1.
Refer to Chapter 5, “Advanced Configuration,” to review the
default settings and ensure that they reflect your preferences.
If you prefer not to change the default settings, then go on
to Chapter 7, “Placing and Receiving Calls”.
Setting up 230K for Windows 95 and Windows NT 4.0
These instructions require prior installation of the impact.inf
driver, which is installed as part of the initial setup procedure.
Refer to “Setup Using Windows 95” or “Setup for Windows NT
4.0” earlier in this chapter for assistance.
1 Ensure that your computer’s COM port and
communications software support 230.4 Kbps.
For instructions on sending AT commands, refer to the section
“Changing the Parameter Settings” on page 5-4.
2 Using terminal emulation software (such as
HyperTerminal) send the command AT $B 230400 to the
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CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
3C882 ISDN modem. This will set the baud rate to 230.4
Kbps.
Once the baud rate is set to a fixed amount you will no longer
be able to access the Configuration dialog box to make
changes. Refer to “Restoring the 3C882 ISDN Modem to
Autobaud” on page 8-9 for assistance.
3 Save this setting by entering AT&W and press return.
Next you must install the 230K driver to take advantage of
the higher baud rate.
4 From the Control Panel dialog box, double click the
Modems icon.
The Modems Properties dialog box appears.
5 Click Add.
The Install New Modem dialog box appears.
6 Check the box to prevent automatic detection of the
3ComImpact IQ ISDN modem and click Next.
The dialog box listing modem manufacturers and modem
models appears.
7 From the Manufacturers list box, select 3COM, and from
the Models list box, select 3ComImpact IQ 230K.
8 Click Next.
9 Select the appropriate COM port. and click Next.
A dialog box indicates successful setup.
10 Click Finish.
11 Be sure to change the setting of your application program
(such as Dial-Up Networking for Windows 95) to 230400
bps.
Setup for 230Kbps
3-33
This completes the procedure to change the baud rate to
230.4 Kbps for Windows 95 and Windows NT 4.0.
Refer to Chapter 5, “Advanced Configuration,” to review the
default settings and ensure that they reflect your preferences.
If you prefer not to change the default settings, then go on
to Chapter 7, “Placing and Receiving Calls”.
3-34
CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS
CONFIGURATION FOR AN
APPLE MACINTOSH
COMPUTER
4
This chapter describes the configuration for the 3C882 ISDN
modem for use with an Apple Macintosh computer. Main
topics covered are:
■
Configuring the 3C882 ISDN modem
■
Configuring Internet access for a Macintosh computer
You will need the ISDN telephone numbers from the ISDN
Information Sheet you completed in Chapter 1.
Configuring the 3C882 ISDN Modem for a
Macintosh Computer
The main steps are shown in Figure 4-1.
Install 3C882
software
Run
SPID Wizard
Configure
Multilink PPP,
B channel rate, &
voice call routing
Verify
configuration
Figure 4-1 3C882 Configuration Steps for a Macintosh
4-2
CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
Installing the 3C882 Software
To install the 3C882 ISDN modem software in an Apple
Macintosh computer:
1 Insert the 3ComImpact IQ Installer Diagnostic Utilities
software utility diskette into the floppy drive and then
double-click the 3ComImpact IQ Installer icon.
A message box appears as shown in Figure 4-2.
Figure 4-2 Installation Message Box
2 Click Continue.
The Readme file opens. You can choose to review the
document or print the file.
3 Click Continue to install the software.
The Software Installation Location dialog box opens.
4 Select the location on your hard drive where you would
like to install the 3ComImpact IQ folder. If you do not want
to use the default folder name, it may be changed.
5 Click Install.
After the 3ComImpact IQ ISDN modem software is installed,
Figure 4-3 will open.
Configuring the 3C882 ISDN Modem for a Macintosh Computer
4-3
Figure 4-3 Successful Installation Message Box
6 Click OK.
This completes the software installation.
Running the SPID Wizard
The SPID Wizard automatically detects your telephone
company’s switch type and configures the SPID(s). The SPID
Wizard automatically runs when you are configuring the
3C882 ISDN modem for the first time, if you connect the
3C882 ISDN modem to a different ISDN line, or if any of your
ISDN line parameters have changed (e.g., an area code). Once
the ISDN switch type, telephone number(s) and SPID(s) have
been configured, clicking on the 3ComImpact IQ program
icon will thereafter directly display the Configuration dialog
box shown in Figure 4-9.
1 Double-click the 3ComImpact IQ program icon shown in
Figure 4-4.
Figure 4-4 3ComImpact IQ Program Icon
4-4
CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
The Select Modem Port screen appears, as shown in
Figure 4-5.
Figure 4-5 Select Modem Port Screen
2 Select the port to which the 3C882 ISDN modem is
connected and then click OK.
The SPID Wizard start screen appears, as shown in Figure 4-6.
Figure 4-6 SPID Wizard Start Screen
If you do not want to run the SPID Wizard, click Cancel to
configure your values manually via the configuration dialog
box (see Figure 4-9). Once there you can select your ISDN
switch type, enter the telephone number(s) and, if required,
enter the corresponding SPID(s) for your ISDN line. Note that
Configuring the 3C882 ISDN Modem for a Macintosh Computer
4-5
the SPID Wizard is the recommended method for configuring
your SPID values.
3 Click Next.
The SPID Wizard first checks for ISDN layer 1status, and then
configures the switch type.
After the switch type is configured, the First Telephone
Number dialog box appears, as shown in Figure 4-7.
Figure 4-7 First Telephone Number Screen for Macintosh
4 Enter the first telephone number for your ISDN line and
then click Next.
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CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
After the SPID Wizard configures the SPID for the first
telephone number, Figure 4-8 appears.
Figure 4-8 Second Telephone Screen for Macintosh
5 If you have a second telephone number for your ISDN line,
enter it and click Next. If not, leave the field incomplete,
and then click Done
If you entered a second telephone number for your ISDN line,
the SPID for the second telephone number is configured.
A message box indicates that the configuration was
successful.
6 Click Done.
The on-line registration dialog box appears. Click Register and
enter your information. When complete, click Register Now.
Configuring the 3C882 ISDN Modem for a Macintosh Computer
4-7
After your information has been sent, the Configuration
dialog box appears, as shown in Figure 4-9.
Figure 4-9 Configuration Dialog Box for Macintosh
The Configuration dialog box buttons do the following.
Update Configuration. Click Update Configuration to
download parameter changes to your ISDN modem’s
S registers.
Update Firmware. Refer to the readme file for firmware
download instructions.
Diagnostics. Use the Diagnostics tool only under the
direction of technical support personnel.
Quit. Click Quit to leave the Configuration dialog box.
Configuring Multilink PPP
Multilink PPP is a protocol that provides a method for
combining multiple PPP connections. Multilink PPP combines
the two ISDN B channels, creating a virtual single digital
connection of up to 128 Kbps. Note that the destination you
4-8
CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
are dialing must also support Multilink PPP, or you will get a
single B channel connection instead of the dual-channel link.
By default, Multilink PPP is enabled. To enable or disable
Multilink PPP, do the following:
1 Click the Multilink check box in the PPP area to clear it
(disable) or check it (enable).
2 Click the Update Configuration button to download the
change to your 3C882 ISDN modem’s S register.
Additional configuration may be needed for Multilink PPP. For
details refer to S registers 82 and 83 in Appendix B.
Note that if you disable Multilink PPP (i.e., Register S80=0),
you can still place a Multilink PPP call without changing the
S 80 register value. In the dial string, enter the first telephone
number, then the ampersand character followed by the
second telephone number. For example:
ATD 908 555 1212 & 908 555 1213
Configuring the B Channel Rate
Specify the B channel rate as 56 Kbps, 64 Kbps, or select
TollMizer if you would like to use that feature. TollMizer
allows you to place a 56 Kbps data call using a voice channel,
which is often less expensive. Note that the device you are
calling must also support TollMizer (sometimes referred to as
Switch 56 Permissive or Data Over Voice) to take advantage
of this feature.
By default, the B channel rate is 56 Kbps. Check with your
telephone company for the appropriate B channel rate.
To change the connection speed to 64 Kbps or TollMizer, do
the following:
1 Select the appropriate radio button (64 Kbps or TollMizer).
2 Click the Update button to download the change to your
3C882 ISDN modem’s S register.
Configuring the 3C882 ISDN Modem for a Macintosh Computer
4-9
Configuring Voice Call Routing
The 3C882 ISDN modem allows you to assign a specific
telephone number to a specified analog phone port. By
default, telephone number 1 is assigned to phone port one,
and telephone number 2 is assigned to phone port two, as
shown in Figure 4-10. This is especially helpful should you
have both a telephone and a fax machine connected to your
3C882 ISDN modem’s analog ports.
232
RS-
NU
ISD
2
1
ET
RES
C
9 VD
X
MA
• 5A
908 555 1212
908 555 1213
Figure 4-10 Voice Call Routing Default Setting
Note the phone port check marks for each telephone
number. This default configuration routes each telephone
number to a specified port.
The ISDN Call Waiting default configuration is best served by
the recommended scenario shown in Figure 4-13. By default,
ISDN Call Waiting has been enabled on Phone Port 1, for use
with your telephone, but disabled on Phone Port 2 to prevent
potential interruption of calls to your fax machine (S76=1).
One Telephone Number and Two Analog Devices.
If you have only one telephone number for your ISDN line
and two analog devices, check the Phone Port 1 and Phone
Port 2 boxes located in the Number 1 group box, as shown in
4-10
CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
Figure 4-11. Calls to that telephone number will ring both
devices, allowing you to answer a call using either device.
NU
ISD
232
RS-
2
1
ET
RES
C
9 VD
X
MA
• 5A
908 555 1212
908 555 1212
Figure 4-11 Configuration for One Telephone Number and Two
Devices
Note that while you are using the fax machine, for example,
you cannot use the telephone to place or receive calls
because your ISDN line has only one telephone number.
Two Telephone Numbers and Two Analog Devices
If you have two telephone numbers and two analog devices
attached to your 3C882 modem, you can choose to have
both ISDN telephone numbers ring both devices
simultaneously. For this scenario, you would place a
checkmark in all four Phone Port boxes, as shown in
Figure 4-12.
232
RS-
NU
ISD
2
1
ET
RES
C
9 VD
X
MA
• 5A
908 555 1212
908 555 1213
908 555 1212
908 555 1213
Configuring the 3C882 ISDN Modem for a Macintosh Computer
4-11
Figure 4-12 Configuration to ring both ports simultaneously
To change the voice call routing setting:
1 Specify which Phone port should handle the calls
associated with Telephone Number 1.
2 If your ISDN line has two telephone numbers, specify
which Phone port should handle the calls associated with
Telephone Number 2.
3 Click the Update Configuration button to download the
change to your 3C882 ISDN modem’s S register.
Verifying the Configuration
Check the status bar located toward the bottom of the
Configuration dialog box to verify correct configuration. If the
parameters were configured accurately and the 3C882 ISDN
modem is ready to send and receive calls, the status bar
fields will appear as shown here.
The TEI number(s) are not configured by the user. The TEI
number(s) are provided by the telephone company for
informational purposes only.
■
Layer 1: UP
■
SPID 1: Init (if required)
4-12
CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
■
TEI 1: Number from 64 to 126
■
SPID 2: Init (if required)
■
TEI 2: Number from 64 to 126 (if required)
Before closing the Configuration dialog box, do the following.
1 Confirm that the Configuration dialog box parameters are
correct.
2 Click the Update Configuration button if you made any
changes to the 3C882 ISDN modem configuration.
3 Click Quit to exit the Configuration dialog box.
This completes the 3C882 ISDN modem configuration.
Refer to Chapter 5, “Advanced Configuration,” to review the
default settings and ensure that they reflect your preferences.
If you prefer not to change the default settings, then go on
to Chapter 7, “Placing and Receiving Calls.”
Configuring Internet Access for a Macintosh
Computer
There are two Internet Access Configuration scenarios
covered:
■
Open Transport (1.1 or higher) with OT/PPP
■
Open Transport (1.1 or higher) with FreePPP
Set Up Using OT/PPP and Open Transport
This section describes setting up the 3C882 ISDN modem for
use with Apple’s Open Transport PPP (OT/PPP) in conjunction
with Apple’s Open Transport networking software (version
1.1 or higher). These instructions assume that the pertinent
software has already been installed on your system.
Configuring Internet Access for a Macintosh Computer
4-13
1 Activate the PPP control panel by choosing the Apple
menu, Control Panels and then PPP. The PPP control panel
opens as shown in .
Figure 4-13 PPP Control Panel
2 Configure the PPP control panel as specified by your ISP.
3 Open the Modem control panel by choosing the PPP pull
down menu and selecting Modem.
The Modem control panel opens as shown in Figure 4-14.
4-14
CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
Figure 4-14 OT/PPP Modem Control Panel
4 Choose the port to which your modem is attached from
the Connect via pop up menu. Then select the appropriate
modem script file from the Modem menu that best
matches your dial up criteria.
For example, if your ISP accepts connections at 64Kbps, and
your computer’s COM port can handle speeds up to 115K,
then you would choose the 3ComImpact™ IQ-64k-115K
modem script.
NOTE: Users of Apple’s System 7.6 or later must move the
3ComImpact IQ Modem Script files into a separate folder in
order to access them from the OT/PPP Modem control panel.
These CCL scripts were placed in your Extensions folder
(located in the System folder) during installation of the
3ComImpact IQ ISDN modem software. If you are using
System 7.6 or later, drag these modem script files from the
Extensions folder into the Modem Scripts folder (also located
in the Extensions folder). Then select the appropriate script
from the Modem menu.
5 Close the Modem control panel by choosing File and Close.
This returns you to the PPP control panel, as shown in .
Configuring Internet Access for a Macintosh Computer
4-15
6 Open the TCP/IP control panel by choosing TCP/IP from
the PPP pull down menu.
The TCP/IP control panel opens as shown in Figure 4-15.
Figure 4-15 TCP/IP Control Panel
7 Choose PPP from the Connect via pop up menu, and Using
PPP Server from the Configure menu (or Manually if
specified by your ISP).
8 Enter the Name server address(es) as directed by your ISP,
and the appropriate Search domain(s) if required. Then
choose File and Close. When asked to save changes do so
by choosing Save.
This returns you to the PPP control panel, shown in .
9 Close the PPP control panel by choosing File and Close.
When asked to save changes, choose Save.
10 To make a connection, open the PPP control panel and
choose Connect.
Once your call has been authenticated, you may open any
web browser to access the Internet, such as Netscape or
Microsoft’s Internet Explorer.
4-16
CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
Set Up Using FreePPP with Open Transport
FreePPP is a freeware application for accessing the Internet
available for use with Apple’s Open Transport networking
software (version 1.1 or higher) or MacTCP, Apple’s older
networking software. These instructions cover Open
Transport configuration only, and assume that the pertinent
software has already been installed on your system.
These instructions are for FreePPP 2.5v2.
1 Open FreePPP Setup from the menu bar control panel
located along the top of your Macintosh screen (you must
have the FreePPP Setup control panel installed in your
Control Panels folder to access and make changes to
FreePPP.)
The FreePPP Setup screen opens as shown in Figure 4-16.
Figure 4-16 FreePPP Setup Screen
NOTE: If you do not see the General, Accounts or Locations
tabs as shown in Figure 4-16, click the diamond on the left
hand side of the FreePPP setup screen to the down position.
2 Click on the Accounts tab and select New.
Configuring Internet Access for a Macintosh Computer
4-17
The Account screen will open as shown in Figure 4-17.
Figure 4-17 FreePPP Account Screen
3 Configure the fields as specified by your Internet service
provider.
Generally you would enter the name of your ISP as the Server
Name. However you may wish to specify a more unique
description to distinguish this particular dial up profile. For
example, you may want to set up two types of connections
to the same ISP, one for single channel 64 Kbps calls and
another for Multilink dual channel 128 Kbps calls. In this case,
you should enter distinguishable names such as ISP 64K and
ISP 128K.
4 Click the Connection tab at the top of the Account screen.
The Connection configuration screen will open as shown
in.Figure 4-18
4-18
CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
Figure 4-18 FreePPP Connection Screen
5 Choose the maximum COM port rate available for your
computer, and then select CTS & RTS (DTR) from the pop
up menu, as shown in Figure 4-18. Click OK to return to
the FreePPP setup screen.
6 Click the General tab to return to the FreePPP Setup
screen. Then click Modem Setup to reveal the FreePPP
Modem Setup screen as shown in Figure 4-19.
Figure 4-19 FreePPP Modem Setup Screen
Configuring Internet Access for a Macintosh Computer
4-19
7 Choose the port to which your 3ComImpact IQ ISDN
modem is attached. Under Modem Init String Settings,
click Use: and add at&d0. Click OK to return to the FreePPP
Setup screen.
NOTE: You may want to set up unique modem configurations
for each dial up Account profile (i.e., one Multilink PPP dial up
account and one 64K Single link dial up). In this case, you
would need to set specific modem init strings for each
Account. To do this, check Use init string from account
configuration in the Modem Init Strings Settings of the
Modem Setup screen shown in Figure 4-19. You would then
specify a specific modem init string under the Connection tab
of each Account configuration profile that you create.
For example, to set up a specific account profile for Multilink
PPP calls, you would add S80=1 to the end of any existing
init string you have; your complete init string would then
read at&d0S80=1.
Multilink PPP calls may also be designated via the
Configuration dialog box.
8 Click Open TCP/IP to access the TCP/IP control panel shown
in Figure 4-20.
4-20
CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER
Figure 4-20 FreePPP TCP/IP Control Panel
9 Choose FreePPP from the Connect via pop up menu.
10 Choose Using PPP Server from the Configure menu (or
Manually if specified by your ISP). Enter the Name Server
Address(es) as directed by your ISP, and the appropriate
Search Domain(s) if required. Then choose File and Close.
When asked to save changes do so by choosing Save.
11 To make a connection, choose Open PPP Connection from
the FreePPP menu bar control panel located at the top of
your screen. Alternatively, choose Open FreePPP Setup, also
located in the FreePPP menu bar control panel, click on
the Accounts tab, highlight the particular dial up account
that you wish to access, and click Connect.
Once your call has been authenticated, you may open any
web browser to access the Internet, such as Netscape or
Microsoft’s Internet Explorer.
5
ADVANCED
CONFIGURATION
This chapter presents information to guide you through
advanced configuration options available for the 3C882 ISDN
modem.
Advanced Configuration Parameter Default Values
To change advanced configuration parameter values, you
will need terminal emulation software which will allow you
to use AT commands.
The Windows 95 and Windows NT operating systems provide
HyperTerminal terminal emulation software. For Macintosh
users, terminal emulation software was provided in the
3ComImpact IQ folder during software installation.
The advanced configuration parameters and their default
settings are as follows:
■
QuickSelect (enabled)
■
Dynamic Bandwidth Allocation (enabled)
■
Auto Answer (disabled)
■
Compression (enabled)
■
Baud Rate (automatic detection of rates up to 115.2 Kbps)
Each parameter is described in detail in the following
sections. If the default settings meet your preferences, go on
to Chapter 7, “Placing and Receiving Calls.”
For instructions on sending AT commands, refer to the section
“Changing the Parameter Settings” on page 5-4.
5-2
CHAPTER 5: ADVANCED CONFIGURATION
QuickSelect
The QuickSelect feature (S71=0, by default) automatically
detects and implements the protocol required for each
digital call, either V.120 or Async-Sync PPP. Typically, V.120 is
used for communication between two computers, whereas
PPP is used for communication between a computer and an
Internet service provider.
Dynamic Bandwidth Allocation
DBA (S70=3, by default) is a method of automatically
reallocating bandwidth to allow you to place or receive a
voice call while a Multilink PPP call is active (i.e., both B
channels are in use).
In this situation, when you lift the handset to place an
outgoing call or to answer an incoming call, one of the B
channels is temporarily removed from the Multilink PPP call
and is used for the voice call.
Once the voice call ends, that B channel is automatically
returned to the Multilink PPP call. Although throughput is
reduced to one channel while the voice call is active, the
integrity of the Multilink PPP call is maintained.
If you are on the receiving end of a Multilink PPP call (i.e.,
someone has dialed into your 3C882 ISDN modem) and you
place a voice call, one of the B channels will still be allocated
for the new voice call. However, once the voice call ends, that
B channel cannot be returned to the incoming Multilink PPP
call. The B channel can only be returned to the Multilink PPP
call for outgoing Multilink PPP calls.
Outgoing DBA takes precedence over incoming DBA. For
example, during a Multilink PPP call, you receive an incoming
voice call over Phone port 1. You may, however, prefer to
place an outgoing call over Phone port 2 and ignore the
incoming call. When you place your call over Phone port 2,
Advanced Configuration Parameter Default Values
5-3
the incoming call is dropped. The calling party will still hear
ringing, and must retry their call.
If you have a Multilink PPP call active and you receive an
incoming voice call, one of the two B channels will not be
assigned to the voice call until you answer the voice call. The
LED remains green until the call is answered.
Auto Answer
When Auto Answer is disabled (S0=0, by default), a RING
message is delivered to the RS-232 serial port upon reception
of an incoming data call to the 3C882 ISDN modem. Enter
the command AT A to answer the incoming data call. A
CONNECT message is then delivered to the RS-232 port upon
successful connection.
If Auto Answer is enabled (S0=(1-255)), the data call is
automatically answered after the number of rings specified
via the S register, and a CONNECT message, along with the
speed of the connection, is delivered to the RS-232 port.
Compression
Compression is a method of reducing the size of transferred
data without losing any information. The 3C882 ISDN modem
automatically compresses data to improve data transfer times
using the hi/fn LZS version 5 compression method.
Compression is enabled (%C2, by default) and will
automatically be invoked unless you are running
compression on your computer. If you are running
compression on your computer, that compression method
will be used instead of 3C882 compression even if 3C882
compression is enabled. AT%C0 will disable compression.
Baud Rate
By default, the baud rate is set to Autobaud ($B0). Autobaud
automatically detects the maximum data rate of your
computer’s COM port. Rates up to 115.2 Kbps can be
detected automatically. 3Com recommends that you leave
5-4
CHAPTER 5: ADVANCED CONFIGURATION
Autobaud enabled unless you want to set the baud rate to
230.4 Kbps. The command AT $B (baud rate) is used to set a
specific baud rate, such as 230.4 Kbps. Refer to Appendix B
for a list of acceptable values.
To access the 3C882 Configuration dialog box, Autobaud
must be enabled. If the baud rate is set to a specific rate, you
will not be able to access the Configuration dialog box. Refer
to Chapter 8, “Restoring the 3C882 ISDN Modem to
Autobaud.” for assistance.
Changing the Parameter Settings
To change parameter settings:
1 Launch your communications or terminal emulation
software.
2 Be sure the 3C882 ISDN modem is in command mode
(sometimes called local mode or terminal mode) so that it
interprets your commands.
When powered on, the 3C882 ISDN modem automatically
starts in command mode. If you have recently used the 3C882
ISDN modem to make a call and have not yet disconnected,
type +++ to switch to command mode.
3 Type:
AT <command>
4 Press [Enter] or [Return].
Refer to Table 5-1 for the appropriate command. For example,
to disable compression, you would type
AT%C0
and then press [Enter] or [Return].
An AT command line starts with the characters AT. The
command line accepts up to 40 command characters in the
line (not including the two AT characters, or spaces).
AT commands may be used to set (or change) a value, as well
as to read the status of an existing value by including a
Changing the Parameter Settings
5-5
question mark (?) after the particular value. For example, to
read the status of S register 63, you would type
AT S63?
and then press [Enter] or [Return].
After completing its tasks, the 3C882 ISDN modem sends a
message to the screen followed by a result code. Refer to
Appendix B for a complete list of result codes.
5 To change another parameter setting, repeat steps 1
through 4. Otherwise, go on to Chapter 7, “Placing and
Receiving Calls.”
Table 5-1 Changing Default Settings
Parameter
Default Value
To Change the Default
QuickSelect
Enabled (S71=0) Send the command ATS71=1 to use Async-Sync
PPP exclusively or ATS71=2 to use V.120 exclusively.
DBA
Enabled for both Send the command ATS70=0 to disable DBA.
incoming and
outgoing calls
(S70=3)
Auto Answer
Disabled (S0=0)
Send the command ATS0=(number of rings before
the ISDN modem answers the call) to enable Auto
Answer.
Compression
Enabled (%C2)
Send the command AT%C0 to disable compression.
Autobaud
Enabled ($B0)
Send the command AT$B (rate) to set a specific
baud rate. Acceptable values are 1200, 2400, 4800,
9600, 19200, 38400, 57600, 115200, and 230400.*
Send the command AT$B0 to return to Autobaud.
Autobaud does not exceed 115200. For 230400 you
must send the command AT $B230400 to the ISDN
modem.
* To access the Configuration dialog box, the baud rate must be set to Autobaud.
5-6
CHAPTER 5: ADVANCED CONFIGURATION
6
SUPPLEMENTARY VOICE
FEATURES
Supplementary Voice Features
This chapter provides an overview of the supplementary
voice features which are available for the 3C882 ISDN
Modem. These voice features are as follows:
■
Call Forwarding
■
ISDN Call Waiting
■
Call Conference (3 Way Calling)
■
Call Transfer
To use Call Conference, as well as Call Transfer, your ISDN line
must support Flexible Calling. To use ISDN Call Waiting, your
ISDN line must support Additional Call Offering (ACO). Check
with your telephone company to determine whether or not
these services are supported. Note that there may be an extra
charge to support these features. Refer to Chapter A,
“Ordering ISDN Service” for additional information.
In some cases your telephone company may enable
supplementary voice features service on your first telephone
number only. You may need to specifically request that these
services be enabled on your second telephone number as
well.
Call Forwarding
The ISDN modem passively supports Call Forwarding. If you
subscribe to this service, which you must order separately
from your telephone company, you can enter the
appropriate command from the analog telephone attached
to your ISDN modem and it will be passed through. Your
6-2
CHAPTER 6: SUPPLEMENTARY VOICE FEATURES
telephone company should provide the appropriate
commands.
The 3C882 ISDN modem will announce a forwarded call by
producing a short ring on the telephone that is routed to the
forwarded number.
ISDN Call Waiting
ISDN Call Waiting allows you to place a voice call on hold
while you answer an incoming voice call.
By default, ISDN Call Waiting is disabled on analog port 2
(S76=1). To avoid potential call interruptions when sending or
receiving a fax transmission, you should therefore install your
fax machine on analog port 2.
Table 6-1 How to Use Call Waiting
How Do I
Do This
Place the first call on hold and
answer the second?
When you hear the call waiting indicator, press and
immediately release the switch hook button.
Place the second call on hold
Press and release the flash hook. The second call is
and then switch back to the first then put on hold.
call?
End the first call and then
answer the second call?
Hang up the telephone, wait for the telephone to ring,
and then answer the call.
What if the call on hold is
dropped?
If the call on hold hangs up at the far end, you will
receive no notice. If you press and release the switch
hook button, you will get a dial tone, indicating that
the call on hold was dropped. Press and release the
switch hook button again to return to the previously
active caller.
What if the active caller hangs
up?
If the active caller hangs up, the call on hold remains
on hold until you retrieve it by pressing and
immediately releasing the switch hook button. If you
hang up while a call is on hold, the telephone will ring
to indicate that there is a call on hold. If you do not
retrieve the call within 6 seconds, the call is dropped.
Supplementary Voice Features
6-3
The analog method for disabling Call Waiting, typically *70, is
not available for ISDN. Instead, you must set the appropriate
S Register (S76) to activate or deactivate the Call Waiting
feature. Refer to Appendix B, “AT Commands, S Registers, and
Result Codes” for the appropriate values.
Troubleshooting
What if the call is busy? The 3C882 ISDN modem supports
two simultaneous voice calls per voice port. If you already
have two calls up (e.g., one active and one on hold), any
incoming calls will be rejected (i.e., the caller hears a busy
signal). An incoming call will also be rejected during an
outgoing call that is not yet active, or while your telephone is
ringing for an incoming call.
If you should hear the Call Waiting indicator when
attempting to dial a third party, the Call Waiting takes
precedence.
Call Conference
Call Conference (also referred to as Three-Way Calling or
TWC) is a voice call feature that allows you to add another
party to an existing call. This feature can be used whether
you have received or have placed the first call.
You cannot conference two incoming calls. You must initiate
the third call in order to activate Call Conferencing.
Table 6-2 How to Use Call Conference
How Do I
Do This
Place a new conference call?
While the first call is active, press and release the
switch hook button. The B channel LED light flashes to
indicate that the first call is on hold, and you will hear
a dial tone. Then dial a third party number.
After the third party has answered, press and release
the switch hook button to connect all three parties.
Drop the last party added to the To drop the last party added to the conference call,
conference call?
press and release the switch hook button.
6-4
CHAPTER 6: SUPPLEMENTARY VOICE FEATURES
Table 6-2 How to Use Call Conference
How Do I
Do This
Abort the second dial and switch If the dialed party is busy, press and release the switch
back to the first call?
hook button to cancel the call and reconnect you to
the first call.
If you dialed a wrong number, or the far end does not
answer, hang up the phone to abort the attempted
call. The phone will then ring, indicating that the first
call is on hold. Answer the phone to reconnect you to
the first call.
What if I hear a dial tone when I
attempt to conference all three
parties?
A dial tone indicates that one of the parties has
dropped their call. Press and release the switch hook
button to return to the previously active call. You can
then conference a third party as described previously.
What if the telephone rings after While you try to conference a call, the active call will
I hang up?
be put on hold to allow you to dial a new call. If you
hang up the phone before the call is connected, the
telephone will ring to let you know that you still have
a call on hold. The call on hold will be disconnected in
6 seconds if the call is not answered.
Call Drop
Call Drop allows you to remove the last caller to a
conference. After a conference call has been established,
simply press and release the flash hook button to drop the
last caller added. See S register 79 in Appendix B for more
Call Drop information.
Call Transfer
Call Transfer is a voice call feature that allows you to transfer
a call to a third party. This feature can be used whether you
have received or have placed the first call.
Table 6-3 How to Use Call Transfer
How Do I
Do This
Place a new call?
While the first call is active, press and release the
switch hook button, wait for the dial tone, and then
dial a third party number.
After the third party has answered, press and release
the switch hook button to conference all three parties,
and then hang up the telephone to transfer the call.
Supplementary Voice Features
6-5
Table 6-3 How to Use Call Transfer
How Do I
Do This
Cancel the second call and
switch back to the first call?
If the dialed party is busy, press and release the switch
hook button to cancel the attempted call and
reconnect you to the first call. If you should hang up,
the phone will ring back, indicating that you have a
call on hold.
If you dialed a wrong number, or the far end does not
answer, hang up the phone to abort the attempted
call. The phone will then ring, indicating that the first
call is on hold. Answer the phone to reconnect you to
the first call.
If you experience difficulty implementing any of the
Supplementary Voice Features, confirm that you have these
features enabled on your ISDN line, and that the default Call
Conferencing, Call Transfer, and Call Drop S register values
(S77, S78, and S79) match the values required by your
telephone company.
ISDN Service from Pacific Bell
If your ISDN line has been provisioned through Pacific Bell,
and you are having difficulty implementing Call Hold, Call
Drop, Call Conference and Call Transfer, you may need to
make three additional S register changes to take advantage
of these Flexible Calling features.
1 Contact Pacific Bell and discern the appropriate Call Hold,
Call Drop, Call Conference and Call Transfer key values.
2 Launch your terminal emulation software.
You will need to change the values of S registers 77, 78, and
79.
3 Send the following command to the 3C882 ISDN modem:
AT S77=x S78=x 79=x
(where x is the key value supplied by Pacific Bell) and press
[Enter] or [Return].
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CHAPTER 6: SUPPLEMENTARY VOICE FEATURES
This completes the procedure for Pacific Bell ISDN users.
Refer to Chapter 5, “Changing the Parameter Settings” or
Appendix B, “AT Commands, S Registers, and Result Codes”
for further assistance.
7
PLACING AND RECEIVING
CALLS
This chapter illustrates how to place and receive a variety of
calls with your 3C882 ISDN modem. The 3C882 ISDN modem
uses AT commands and S registers for call management.
This chapter covers the following:
■
Placing ISDN data calls
■
Placing a Multilink PPP call
■
Placing a TollMizer call
■
Receiving ISDN data calls
■
Placing calls using an analog phone port
■
Receiving calls using an analog phone port
■
ISDN Call Logging
Placing ISDN Data Calls
You can let your communications software send and receive
calls for you, or you can use a terminal emulator to place calls
manually. Software that communicates using AT commands
(such as HyperTerminal) is required to control the 3C882
ISDN modem. You can choose to enter these codes manually;
however they are often entered automatically by modem
communications software.
When you place a call, the B channel LED(s) flash green and
then remain lit once the call is established. (If you are
running Multilink PPP, one B channel flashes and then
remains lit. Then the second B channel flashes and it too
remains lit.)
For Macintosh users, add &DO to the modem initialization
string of your communications software.
7-2
CHAPTER 7: PLACING AND RECEIVING CALLS
Placing Calls Automatically
If you are using standard communications software, select
the 3ComImpact IQ ISDN modem. If the 3ComImpact IQ
ISDN modem is not listed, select a Hayes®-compatible
modem configuration and dial out through the 3C882 ISDN
modem. If you are using a Hayes-compatible modem
configuration, you may have to manually configure settings
such as baud rate. Refer to your communications software
documentation for more details.
Placing Calls Manually
You can place calls manually using AT commands. Your
communications software must be in terminal emulation
mode.
Follow these steps to use AT commands:
In most situations, an initialization string is not necessary
with the 3C882 ISDN modem. If an initialization string is
required by the communications software or server, use the
Hayes default initialization string.
1 Launch your communications software.
2 Be sure the 3C882 ISDN modem is in command mode
(sometimes called local mode or terminal mode) so that it
interprets your commands.
When your computer is powered on, the 3C882 ISDN modem
automatically starts in command mode. If you have recently
used the 3C882 ISDN modem to make a call and have not yet
disconnected, type +++ to switch to command mode.
3 Type:
AT D <telephone number>
The 3C882 ISDN modem recognizes the AT command ATD to
dial a digital ISDN data call. Correct examples of outgoing
Placing ISDN Data Calls
7-3
circuit-switched ISDN modem commands with dial strings
are:
AT D 1 408 654 2703
ATD14086542703
For a summary of the AT command set, see Appendix B.
4 Press [Enter] or [Return].
After completing its tasks, the 3C882 ISDN modem sends a
message to the screen.
An AT command line starts with the characters AT. The
command line can accept up to 40 command characters in
the line (not including the two AT characters, or spaces) Refer
to Chapter 5, “Changing the Parameter Settings” for
assistance on AT commands.
Placing Multilink PPP Calls
Before you place a call, ensure that the Multilink PPP box on
the 3C882 ISDN modem Configuration dialog box is checked.
The destination you are calling must also support Multilink
PPP. For example, if you are trying to dial into the Internet,
your Internet service provider must support Multilink PPP in
order to successfully place a Multilink PPP call.
Although this is not generally the case, your Internet service
provider may require an Endpoint Discriminator Class and an
Endpoint Discriminator. The Endpoint Discriminator Class is
configured using S register 82. The Endpoint Discriminator
value is configured using S register 83. Refer to Appendix B
for acceptable values.
For automatic placement of a Multilink PPP call, once you
have checked the appropriate box in the Configuration
dialog box, simply launch the call.
For manual dialing, use terminal emulation software and type
the following:
7-4
CHAPTER 7: PLACING AND RECEIVING CALLS
ATD <telephone number>
An example is as follows:
ATD 1 908 555 1212
Some Internet service providers may require you to dial two
telephone numbers to place a Multilink PPP call. In this case,
the ampersand (&) character is used to dial two telephone
numbers.
To automatically dial two telephone numbers, add the
following to the dial string of your application software:
<telephone number 1> & <telephone number 2>
In this case, you would type, for example:
ATD 1 908 555 1212 & 1 908 555 1213
Note that if Multilink PPP is disabled (i.e., S 80=0), you can
still place a Multilink PPP call without changing the S 80
register value. In the dial string, enter the first telephone
number, then the ampersand character followed by the
second telephone number, as shown in the example above.
Placing a TollMizer Call
The TollMizer feature (also referred to as Switch 56 Permissive
or Data Over Voice) allows you to place a data call using a
voice channel, saving the extra cost of the data channel.
Combining TollMizer with 3ComImpact IQ compression, you
can transfer up to 128 Kbps of data for the price of a single
voice call.
TollMizer calls may not work properly if placed via long
distance carriers.
You can select this feature from the 3C882 ISDN modem’s
Configuration dialog box. Once enabled, all outgoing ISDN
calls will be TollMizer calls. Note that to place calls to devices
which do not support TollMizer, you must disable this feature
Receiving ISDN Data Calls
7-5
either via the Configuration dialog box or setting
S register 61=0.
By setting S register 61=1, all outgoing calls will be TollMizer
calls.
Alternatively, you can place TollMizer calls on a call by call
basis using the command ATDD <telephone number>. To
manually dial a TollMizer call on a call-by-call basis, type the
following:
ATDD <telephone number>
An example is as follows:
ATDD 1 908 555 1212
Note that the TollMizer feature is available for Multilink PPP
calls as well.
Before using the TollMizer feature, check with your Internet
service provider to verify that they support it and that it is
enabled.
The device you are dialing into must be capable of generating
the 2.1 kHz tone needed to disable the echo cancellers on the
line. Refer to the Readme file located on the software diskette
for more information.
Receiving ISDN Data Calls
The 3C882 ISDN modem can receive incoming
circuit-switched data calls from other 3C882 ISDN modems
or from ISDN devices.
When Auto Answer is disabled (S0=0, by default), a RING
message is delivered to the RS-232 port upon reception of an
incoming data call to the 3C882 ISDN modem. Enter the
command AT A to answer the incoming data call. A
CONNECT message is then delivered to the RS-232 port upon
successful connection.
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CHAPTER 7: PLACING AND RECEIVING CALLS
If Auto Answer is enabled, the call is automatically answered
and a CONNECT message, indicating the speed of the
connection, is delivered to the RS-232 port.
When the 3C882 ISDN modem receives a voice call, the
B channel LED(s) flash green and then remain lit once the call
is answered. (If you are running Multilink PPP, both
B channels flash and then remain lit.)
A flashing LED(s) indicate that the receiving end has not yet
answered the call.
Placing Voice Calls Using an Analog Phone Port
To place an outgoing call, simply take the telephone handset
or external fax machine off the hook, wait for a dial tone, and
dial the destination telephone number.
When you place a voice call, a B channel LED flashes amber,
and then remains lit once the call is established.
A flashing LED(s) indicate that the receiving end has not yet
answered the call.
Receiving Voice Calls Using an Analog Phone Port
By default, incoming calls to ISDN telephone number 1 will
ring devices connected to phone port one, while calls to
ISDN telephone number 2 will ring devices connected to
phone port two.
When the 3C882 ISDN modem receives a voice call, a
B channel LED flashes amber, and then remains lit once the
call is answered.
During a Multilink PPP session, the B channel LED will remain
green until the call is answered.
ISDN Call Logging
7-7
Troubleshooting
If both ports are busy, and Call Waiting has been disabled
(i.e., S76), the third incoming call generates a busy signal to
the far end.
If Call Waiting is enabled, and your telephone company has
provisioned this feature on your ISDN line, you will hear the
Call Waiting indicator (a click), alerting you to an incoming
call. Refer to Chapter 6, “Supplementary Voice Features” for
further ISDN Call Waiting assistance.
ISDN Call Logging
ISDN Call Logging displays the five latest incoming and
outgoing numbers over the data and analog ports. To use
this feature, your ISDN line must support Caller ID.
Conventional, or Analog Caller ID, which requires an
additional external device to monitor incoming calls, is not
supported by the 3C882 ISDN modem. However, you must
have Caller ID enabled on your ISDN line to utilize the Call
Logging feature.
To view the call log, use terminal emulation software to enter
the command AT\N and then press Enter. If there had been
any incoming or outgoing calls over the data (RS-232) port or
analog ports, the telephone number of the caller (for
incoming calls) or called party (for outgoing calls) is
displayed followed by a time indicator. This time indicator
shows the elapsed time between the specific incoming or
outgoing call and the time you accessed the log to view the
call information.
For example, if you enter AT\N and see an incoming call with
a time of 7:30 logged, this indicates that call was received
seven minutes and thirty seconds ago.
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CHAPTER 7: PLACING AND RECEIVING CALLS
This information is cleared upon restarting or power cycling
the unit. To clear the Call Logging information manually, use
terminal emulation software to enter the command AT\N0.
Troubleshooting
What if no information is displayed? If you enter AT\N but
the Call Logging information is not displayed, you may not
have Caller ID provisioned on your ISDN line. If you would
like to use the Call Logging feature, contact your telephone
company and have them enable Caller ID. Note that there
may be an additional charge to add this service.
8
TROUBLESHOOTING
This chapter explains how to isolate and solve problems
encountered with the 3C882 ISDN modem. Problems may
stem from incorrect option settings or improper installation.
Your ISDN line provisioning may also affect your 3C882 ISDN
modem’s performance. Refer to Chapter A, “Ordering ISDN
Service” for assistance.
This chapter covers the following main topics:
■
Checking the basics
■
Monitoring the LEDs
■
Evaluating symptoms and solutions
■
Identifying error codes
■
Using on-line help
■
Finding more information
■
Contacting technical support
■
Downloading firmware
■
Microkey driver error codes
■
Restoring the modem to Autobaud
There are no user-serviceable parts inside your 3C882 ISDN
modem. Unauthorized opening of the unit will void the
warranty.
8-2
CHAPTER 8: TROUBLESHOOTING
Checking the Basics
Before you monitor the LEDs or refer to the section on
symptoms and solutions, check the following:
■
Verify that the cables are not physically damaged. If damage
is apparent, replace the cable.
■
Verify that the power cord is connected to an electrical outlet
and the 3C882 ISDN modem.
■
Verify that the ISDN cable is properly connected to the 3C882
ISDN modem and the ISDN wall jack.
■
Verify that the 3C882 ISDN modem is connected to the
proper COM port. Note that the DTR LED will indicate
successful communication between your communications
application and the 3C882 ISDN modem.
The 3C882 ISDN modem will not operate if connected to an
analog telephone wall jack. Make sure that the 3C882 ISDN
modem is connected directly into the ISDN wall outlet
without connection to any intermediate telephone
equipment (an NT1 device is not required with the 3C882
ISDN modem).
Monitoring LEDs
If you are experiencing operational inconsistencies, monitor
the following LEDs to isolate problems.
Monitoring the TEST LED
Press the Reset button and observe the TEST LED. During
power-up self-test, the TEST LED flashes.
■
If the LED goes out after the test has been completed, the
test has been successful.
■
If the TEST LED flashes and remains on for more than a few
minutes, there is an internal failure. Notify your reseller that
the 3C882 ISDN modem has failed the self-test, and order a
replacement.
Monitoring LEDs
8-3
Monitoring the D Channel LED
Observe the D channel LED. If you are connected to a live
digital ISDN line, the D channel LED remains lit for a few
minutes after the self-test and then begins to flash. When the
D channel LED flashes, it indicates that the ISDN signal is
present and it is attempting to synchronize with the
telephone company.
When the D channel LED goes out, it indicates that a valid
communication channel has been established and you can
place calls. If the D channel LED does not go out, refer to the
“Evaluating Symptoms and Solutions” section.
Monitoring the B Channel LEDs
Attempt to place a call and observe the B channel LED(s). The
B1 and B2 LEDs flash amber for a voice call or green for a
data call during the call establishment phase. They then
remain continuously amber or green once the connection is
established. If they do not remain continuously amber or
green, refer to the “Evaluating Symptoms and Solutions”
section below.
Monitoring the SD LED
When flashing, the Send Data LED indicates that information
is being transmitted over the serial data port from the
computer to the 3C882 ISDN Modem.
If this LED flashes and yet you are not able to communicate
with the ISDN modem, you may be attempting to
communicate at incompatible baud rates. Refer to “Restoring
the 3C882 ISDN Modem to Autobaud” below.
Monitoring the RD LED
When flashing, the Receive Data LED indicates that
information is being transmitted over the serial data port to
the computer from the 3C882 ISDN modem.
If this LED flashes and yet you are not able to communicate
with the 3C882 ISDN modem, you may be attempting to
8-4
CHAPTER 8: TROUBLESHOOTING
communicate at incompatible baud rates. Refer to
“Evaluating Symptoms and Solutions” below.
Monitoring the DTR LED
When illuminated, the Data Terminal Ready LED indicates
that communication between the 3C882 ISDN modem and
your computer has been established.
If the DTR LED does not illuminate, refer to “Evaluating
Symptoms and Solutions” below.
Evaluating Symptoms and Solutions
Table 8-1 lists symptoms of common problems, possible
causes, and possible solutions.
Table 8-1 Symptoms, Causes, and Solutions
Symptom
Possible Cause
Solution
TEST LED remains
lit for more than a
few minutes
An internal failure.
Notify 3Com Technical Support that
the 3C882 ISDN modem has failed the
self-test.
D channel remains
lit for more than a
few minutes
Poor physical connection to
If the telephone wires at your site
the local telephone company. appear to be satisfactory, call your
local telephone company for repair of
telephone company equipment and
troubleshooting assistance.
D channel
continues to flash
for more than a
few minutes
A mismatch between the
settings of the ISDN line and
the 3C882 ISDN modem
configuration.
(Continued)
Verify the telephone number and SPID
(if required). If the D channel LED
continues to flash, open the 3C882
ISDN modem’s Configuration dialog
box. If your telephone number has
changed, the SPID Wizard may be able
to reconfigure your SPID values. Or call
your telephone company to verify the
SPID and telephone number and
ensure that the telephone company
has configured the ISDN line properly
(refer to Appendix A, “Ordering ISDN
Service.”).
Evaluating Symptoms and Solutions
8-5
Table 8-1 Symptoms, Causes, and Solutions
Symptom
Possible Cause
Calls cannot be
If you cannot place a call,
placed from analog there may be a problem with
equipment
the configuration of your ISDN
line.
Solution
Call the telephone company to verify
that your line is configured for
circuit-switched voice and data
service.
Calls from an analog port may From the Configuration dialog box,
be blocked.
check the Phone Port 1 and Phone
Port 2 boxes, which are used for voice
call routing. Ensure that the correct
Phone Port box for each port is
checked.
Attach a different telephone to the
analog port to verify if the problem is
with the analog device.
SPID 2 takes several The switch type has been
minutes to initialize manually changed to
“unknown” (S50=0) but the
SPID fields have not been
cleared.
If you change the switch to
“unknown”, clear the values in the
SPID fields by deleting the values
listed in S52 and S53. Use terminal
emulation software to enter the
commands ATS52= and ATS54=
B channel LED(s)
do not remain
green or amber
Carefully monitor the B1 and B2 LEDs
while attempting a call. These LEDs
flash during call establishment and
then remain green or amber once the
connection is established.
Problem with your computer
or application software or
incompatible local or toll
telephone company.
If neither LED flashes, ensure that your
computer is turned on and
operational, and that your application
software has sent an AT dial
command in the proper format.
There may be an incompatible local or
toll telephone company. Contact your
local telephone company and have it
verify that you can dial a data call to
the destination telephone number.
Send the command AT\S and check
the cause code field.
(Continued)
8-6
CHAPTER 8: TROUBLESHOOTING
Table 8-1 Symptoms, Causes, and Solutions
Symptom
Possible Cause
Solution
A connection has
There is an interoperability
been established
mismatch between the local
(B-1 or B-2 green and remote applications.
LED remains lit
and you receive a
CONNECT
message) but data
cannot be sent
Make sure that the local and remote
data applications have
communications capability and are
properly configured.
Upon power up,
both the TEST and
D channel LEDs
flash
A previous firmware
download did not complete
successfully.
Download the firmware. Refer to the
readme file for firmware download
instructions.
Both B1 and B2
LEDs flash when
the D channel
lights
The 3C882 ISDN modem baud
rate is set to 230.4 Kbps. or to
a fixed rate (i.e., Autobaud is
disabled).
Ensure that your computer’s COM port
supports 230.4 Kbps or change the
COM port setting of either your
computer or the ISDN modem so that
both devices are set to the same COM
port rate.
Cannot place or
receive two
simultaneous calls
Your ISDN line has not been
provisioned for simultaneous
voice and data.
Check your ISDN line provisioning.
Ensure that simultaneous voice and
data has been provisioned for both
directory numbers.
DTR LED does not
remain lit after you
have started your
communication
application
Communication between the
ISDN modem and your PC has
not been successfully
established.
Verify that the 3C882 ISDN modem is
powered on.
Ensure that the baud rates for each
application are set to an equal value.
Verify that the COM port cable is
firmly connected to the COM port on
your PC and the COM port on the
3C882 ISDN modem.
Verify that the correct COM port (the
one to which the 3C882 ISDN modem
is connected) is selected in your
communications application.
(Continued)
8-7
Table 8-1 Symptoms, Causes, and Solutions
Symptom
Possible Cause
Solution
ISDN Call Waiting
does not work.
ISDN Call Waiting is disabled.
ISDN Call waiting is disabled on Port 2
by default (S76=1). Use terminal
emulation software to change S76 to
the appropriate value. Refer to
Chapter B, “AT Commands, S Registers,
and Result Codes” for the available
options.
Your ISDN line is not
provisioned for ISDN Call
Waiting
To use ISDN Call Waiting, you must
have ACO (Additional Call Offering)
provisioned on your line. Contact your
telephone company for further
assistance.
Note that ACO is not available on a
5ESS Custom switch.
Cannot place a call DBA is not enabled.
when a Multilink
PPP call is active
(DBA).
Make sure DBA is enabled by setting
S70. Refer to Chapter B, “AT
Commands, S Registers, and Result
Codes” for the available options.
Cannot receive an DBA is not provisioned on
incoming voice call your ISDN line
during a Multilink
PPP session.
To use incoming DBA, you must have
ACO (Additional Call Offering)
provisioned on your line. Contact your
telephone company for further
assistance.
Note that ACO is not available on a
5ESS Custom switch
8-8
CHAPTER 8: TROUBLESHOOTING
Microkey Error Codes
Table 8-2 lists Microkey error codes, possible causes, and
possible solutions regarding installation of the Microkey Com
Port Accelerator card for Windows 3.x.
Table 8-2 Microkey Error Codes and Their Meaning
Error Code
Possible Cause
Solution
1001
Cannot find or copy the file
s7comm.drv.
Check the 3COM directory and
reinstall the 3C882 ISDN modem
software.
1002
Cannot find or copy the file
s7vcd.drv.
Check the 3COM directory and
reinstall the 3C882 ISDN modem
software.
1003
Cannot find or copy the file
s7combuf.drv.
Check the 3COM directory and
reinstall the 3C882 ISDN modem
software.
1004
Cannot create a backup SYSTEM.INI
file.
Reinstall the 3C882 ISDN modem
software.
1005
Cannot remove *vcd from the
SYSTEM.INI file.
An unknown third-party device
driver may exist on the computer.
Please contact 3Com Technical
Support for further assistance.
1006
Cannot remove *combuf from the
SYSTEM.INI file.
An unknown third-party device
driver may exist on the computer.
Please contact 3Com Technical
Support for further assistance.
1007
Cannot remove comm.drv from the
SYSTEM.INI file.
An unknown third-party device
driver may exist on the computer.
Please contact 3Com Technical
Support for further assistance.
1008
Cannot configure the SYSTEM.INI file
for s7comm.drv.
Reinstall the 3C882 ISDN modem
software. and/or contact 3Com
Technical Support.
1009
Cannot configure the SYSTEM.INI file
for s7vcd.drv.
Reinstall the 3C882 ISDN modem
software. and/or contact 3Com
Technical Support.
1010
Cannot configure the SYSTEM.INI file
for s7comm.buf.drv.
Reinstall the 3C882 ISDN modem
software. and/or contact 3Com
Technical Support.
1021
Cannot remove TURBOVCD.386 from Try to remove these items
the SYSTEM.INI file.
manually and/or contact 3Com
Technical Support.
Restoring the 3C882 ISDN Modem to Autobaud
8-9
Table 8-2 Microkey Error Codes and Their Meaning
Error Code
Possible Cause
Solution
1022
Cannot remove TURBOBUF from the
SYSTEM.INI file.
Try to remove these items
manually and/or contact 3Com
Technical Support.
Restoring the 3C882 ISDN Modem to Autobaud
The 3C882 ISDN modem autobauds up to 115 Kbps (by
default) to match your computer’s COM port speed. If you
fixed the baud rate of the modem using the AT$B command
and the COM port speed of the connected computer no
longer matches that rate, or if you have installed a serial port
card that allows for transfers up to 230.4 Kbps and have set
the baud rate accordingly, then you will not be able to
communicate with the 3C882 ISDN modem. You can restore
the 3C882 ISDN modem to autobaud mode by following
these steps:
1 Use terminal emulation software on the connected
computer to set the software at a low baud rate, such as
1200 baud.
2 Power up the 3C882 ISDN modem and observe the LEDs.
When the Test LED goes off, observe the B1 and B2 LED
lights. These LEDs should flash momentarily. Immediately
type the letter “a” repeatedly from your keyboard, until you
see the letter “a” appear on the screen. (This may take
approximately 5 seconds.) When you see the letter “a”, it
indicates that 3C882 ISDN modem is now running autobaud
and will adapt itself to the baud rate of your computer's COM
port.
3 Send the command AT&W to the 3C882 ISDN modem to
save this change.
8-10
CHAPTER 8: TROUBLESHOOTING
Using On-Line Help
The following on-line help is available:
■
For comprehensive information about the 3C882 ISDN
modem, click the 3ComImpact IQ Help icon in the
3ComImpact IQ program group.
■
From the 3C882 Configuration dialog box for Windows, click
the Help button for information about the Configuration
dialog box.
■
For the Macintosh, on-line help may be accessed by clicking
the question mark icon in the main menu bar and then
selecting the 3ComImpact IQ Help.
Finding More Information
For more information about the 3C882 ISDN modem, such as
frequently asked questions and specific technical notes, refer
to the enclosed Technical Support card for contact
information, use 3Com’s fax service (1) (408) 727-7021 in the
U.S. or visit 3Com’s World Wide Web site at
http://www.3Com.com/.
Downloading Firmware to Your 3C882 ISDN
Modem
Your 3C882 ISDN modem has been uniquely designed to be
user-upgradable. The latest firmware for your 3C882 ISDN
modem is available on 3Com’s ftp site, ftp.3Com.com. Refer
to your readme file for instructions concerning downloading
firmware.
A
ORDERING ISDN SERVICE
This appendix describes how to order ISDN service. If you are
ordering ISDN for the first time, you may either have 3Com
order ISDN service for you, free of charge, or you may choose
to call your telephone company and order ISDN yourself.
ISDN line provisioning information is subject to change. Visit
3Com’s World Wide Web site (http://www.3com.com) for the
latest information.
Placing the ISDN Order Through 3Com
Simply call 1-800-572-3Com to have your ISDN line ordered
for you. 3Com’s SupernetAccess service will provide the
appropriate line parameters to your telephone company and
schedule installation of your ISDN line, wherever possible. Be
sure to ask for the order code or order confirmation number.
Placing the ISDN Order Through Your Telephone
Company
To simplify the many features available for ISDN, Bellcore has
created several packages, called ISDN Ordering Codes (IOC),
for choosing the line configurations that best fit your needs.
For the 3C882 ISDN modem, 3Com recommends Capability
Package S1.
If IOC S1 is not recognized by your telephone company, then
Package M (with ACO added and, if you want supplementary
voice services, ask for FCO as well) may be substituted. Should
your telephone company fail to recognize either IOC S1or M,
refer to “ISDN Line Parameter Tables”.
A-2
APPENDIX A: ORDERING ISDN SERVICE
To order the ISDN service from the telephone company for
the 3C882 ISDN modem:
1 Call the telephone company and ask for the ISDN
representative.
2 Tell the representative that you would like to place an
order for ISDN service for a 3ComImpact IQ External ISDN
modem.
3 Request that your line be provisioned according to
Bellcore capability package S1, the recommended ISDN
Ordering Code for use with your 3C882 ISDN modem.
IOC S1 provides circuit switched voice and data on both
B channels, allowing simultaneous voice and data on either
phone number, and may equip both ports with Additional
Call Offering (ACO). Note that you may need to specifically
request ACO, which allows for ISDN Call Waiting and
incoming DBA.
Some telephone companies may choose to implement ISDN
line provisioning uniquely. Therefore, some of the
Supplementary Voice features may not be available for use
with all telephone companies. Refer to “What Do I Need To
Support Supplementary Voice Features?” on page A-3 or
check with your telephone company for more information.
4 Specify the optional Supplementary Voice Features that
you would like to utilize on your ISDN line.
To take full advantage of the 3C882 ISDN modem, you need
to add Flexible Calling (FCO) features: 3-Way Calling (Call
Conference); Call Transfer, Hold, and Drop; Caller ID (which is
necessary to utilize the Call Logging feature); and the Call
Forwarding variable, which enables Call Forwarding. You may
also choose to order only those specific services that best fit
your needs. Note that there may be an additional charge
when adding each service to your ISDN line.
What Do I Need To Support Supplementary Voice Features?
A-3
Some telephone companies may choose to refer to the
Flexible Calling features by unique terminology. Refer to
“What Do I Need To Support Supplementary Voice Features?”
on page A-3 for more information; additionally,
Chapter 6, “Supplementary Voice Features” provides a
thorough explanation of each voice feature.
5 Ask the representative which ISDN switch type your ISDN
line will be using. Place a check mark on the appropriate
line on the ISDN Information Sheet on page 1-7.
Several features, such as Call Waiting and incoming DBA, are
not available on a 5ESS Custom switch. If you would like to
utilize these services, ask the representative if another switch
type is available for your ISDN line.
6 Ask the ISDN representative to provide the information
you need to fill out the rest of the ISDN Information Sheet
on page 1-7.
This completes the procedure for ordering your ISDN line.
What Do I Need To Support Supplementary Voice
Features?
Release 3.10, and any later releases of the 3CC882 ISDN
modem, include supplementary voice features. To use these
features, your ISDN line must provide the ability to support
these services. Refer to Table A-1 to determine what
capability your ISDN line needs to support the various
services. Note that there may be an extra charge for these
services.
A-4
APPENDIX A: ORDERING ISDN SERVICE
Some telephone companies may choose to refer to the
Flexible Calling features by unique terminology.
Table A-1 Supporting Supplementary Voice Features
To Use This 3ComImpact IQ
Voice Feature
ISDN Call Waiting
Allows you to place a voice call on hold
while you answer a second incoming call.
Call Conference (3-Way Calling)
Ask for This on Your ISDN Line
Additional Call Offering (included with
Ordering Code S1)
Flexible Calling (FCO) or 3-Way Calling
Allows you to add a third party to an
existing call.
Call Drop
Flexible Calling (FCO) or Call Drop
Allows you to remove the last caller added
to a conference.
Call Forwarding
Call Forwarding Variable
Allows you to transfer an existing call to
another telephone number.
Call Transfer
Flexible Calling (FCO) or Call Transfer
Allows you to forward calls to a third party.
Call Logging
Caller ID*
Allows you to view a list of all incoming
and outgoing telephone numbers.
* Conventional, or analog Caller ID, which requires an external device to monitor incoming
calls, is not supported by the 3C882 ISDN modem. However, you must have Caller ID
enabled on your ISDN line to utilize the Call Logging feature.
ISDN Line Parameter Tables
Some telephone companies do not recognize ISDN Ordering
Codes. In this case, simply determine the switch type for your
ISDN line (by asking your ISDN representative), and
photocopy and fax the appropriate table on the following
pages directly to your telephone company.
ISDN Line Parameter Tables
A-5
AT&T 5ESS Switch NI1
To order ISDN service for the AT&T® 5ESS switch, supply the
telephone company with the information provided in
Table A-2.
Table A-2 Line Configuration for AT&T 5ESS NI1
Required Information
Specification
Line Type
Standard (2B+D) National ISDN-1 line
Line Code
2B1Q
Interface Type
U interface
Directory Numbers
2*
Maximum Terminals
1
Maximum B Channels
2*
Actual User
Yes
Circuit-Switched Voice
2*
Circuit-Switched Voice Channel
Any
Circuit-Switched Data
2
Circuit-Switched Data Channel
Any
Terminal Type
A (Basic Terminal)
Display
Yes
Circuit-Switched Voice Limit
2*
Circuit-Switched Data Limit
2
Voice or Data
Both
Call Appearance Preference
Idle
Flexible Call Offering (FCO)
Yes†
Additional Call Offering (ACO)
Yes‡
Caller ID
Yes**
Call Forwarding Variable
Yes††
* The Directory Number, Circuit-Switched Voice, Maximum B Channels, and Circuit-Switched Voice
Limit parameters should be set to 2 to allow both analog ports to be used simultaneously. If those
parameters are set to 1, the ISDN line can only place or receive one call at a time.
† Flexible Calling (FCO) provides 3-Way Calling (Call Conference), Hold, Drop, and Transfer from
analog equipment attached to the modem.
‡ Additional Call Offering (ACO) allows you to use incoming Dynamic Bandwidth Allocation (DBA) as
well as Call Waiting.
**Caller ID is necessary to employ the Call Logging feature. If you would like to have Call Logging,
you must order Caller ID. However, Caller ID itself, which requires an external device to monitor
incoming calls, is not supported.
††Call Forwarding allows you to forward calls to another telephone number.
A-6
APPENDIX A: ORDERING ISDN SERVICE
AT&T 5ESS Custom Switch
To order ISDN service for the AT&T 5ESS Custom switch,
photocopy and fax Table A-3 to the telephone company.
Table A-3 Line Configuration for AT&T 5ESS Custom
Required Information
Specification
Line Type
Standard (2B+D) ISDN line with point-to-point
configuration
Line Code
2B1Q
Interface Type
U interface
Directory Numbers
2*
Maximum Terminals
1
Maximum B Channels
2*
Actual User
Yes
Circuit-Switched Voice
2*
Circuit-Switched Voice Channel
Any
Circuit-Switched Data
2
Circuit-Switched Data Channel
Any
Terminal Type
A (Basic Terminal)
Display
Yes
Circuit-Switched Voice Limit
2*
Circuit-Switched Data Limit
2
Voice or Data
Both
Call Appearance Preference
Idle
Flexible Call Offering (FCO)
No†
Additional Call Offering (ACO)
No‡
Caller ID
Yes**
Call Forwarding Variable
Yes††
* The Directory Number, Circuit-Switched Voice, Maximum B Channels, and Circuit-Switched Voice
Limit parameters should be set to 2 to allow both analog ports to be used simultaneously. If those
parameters are set to 1, the ISDN line can only place or receive one call at a time.
† Flexible Calling (FCO) provides 3-Way Calling (Call Conference), Hold, Drop, and Transfer from
analog equipment attached to the modem. The 3C882 ISDN modem does not support FCO for use
with an AT&T 5ESS Custom Switch.
‡ Additional Call Offering (ACO) allows you to use incoming Dynamic Bandwidth Allocation (DBA) as
well as Call Waiting. The 3ComImpact IQ does not support ACO for use with an AT&T 5ESS Custom
Switch.
**Caller ID is necessary to employ the Call Logging feature. If you would like to have Call Logging,
you must order Caller ID. However, Caller ID itself, which requires an external device to monitor
incoming calls, is not supported.
††Call Forwarding allows you to forward calls to another telephone number.
ISDN Line Parameter Tables
A-7
NorthernTelecomDMS 100 Switch
To order ISDN service for the Northern Telecom® DMS 100
switch, photocopy and fax Table A-4 to the telephone
company.
Some telephone companies will only provision one analog
voice port on a DMS 100 switch. Check with your telephone
company for additional line provisioning information.
Table A-4 Line Configuration for DMS 100
Required Information
Specification
Line Type
Standard (2B+D) National ISDN-1 line
Line Code
2B1Q
Interface Type
U interface
Directory Numbers
2*
Circuit-Switched Voice
2*
Maximum B Channels
2*
Circuit-Switched Voice Limit
2*
Bearer Restriction Option
No packet mode data (NOPMD)
Protocol
Functional version 2 (PVC 2)
SPID Suffix
1
Terminal Endpoint Identifier (TEI)
Dynamic
Maximum Keys
64
Ring
No
Key System (EKTS)
No
Voice or Data
Both
Data Option
Lower layer compatibility
Flexible Call Offering (FCO)
Yes†
Additional Call Offering (ACO)
Yes‡
Caller ID
Yes**
Call Forwarding Variable
Yes††
* The Directory Number, Circuit-Switched Voice, Maximum B Channels, and Circuit-Switched Voice
Limit parameters should be set to 2 to allow both analog ports to be used simultaneously. If those
parameters are set to 1, the ISDN line can only place or receive one call at a time.
† Flexible Calling (FCO) provides 3-Way Calling (Call Conference), Hold, Drop, and Transfer from
analog equipment attached to the modem.
‡ Additional Call Offering (ACO) allows you to use incoming Dynamic Bandwidth Allocation (DBA) as
well as Call Waiting.
A-8
APPENDIX A: ORDERING ISDN SERVICE
**Caller ID is necessary.to employ the Call Logging feature. If you would like to have Call Logging,
you must order Caller ID. However, Caller ID itself, which requires an external device to monitor
incoming calls, is not supported.
††Call Forwarding allows you to forward calls to another telephone number.
Siemens EWSD Switch
To order ISDN service for the Siemens® EWSD switch, supply
photocopy and fax Table A-5 to the telephone company.
Table A-5 Line Configuration for Siemens EWSD
Required Information
Specification
Line Type
Standard (2B+D) National ISDN-1 line
Line Code
2B1Q
Interface Type
U interface
Directory Numbers
2*
Circuit-Switched Data and Voice
2*
Maximum B Channels
2*
Circuit-Switched Voice Limit
2*
Bearer Restriction Option
No packet mode data (NOPMD)
Protocol
Functional
SPID Suffix
1
Terminal Endpoint Identifier (TEI)
Dynamic
Key System (EKTS)
No
Flexible Call Offering (FCO)
Yes†
Additional Call Offering (ACO)
Yes‡
Caller ID
Yes**
Call Forwarding Variable
Yes††
* The Directory Number, Circuit-Switched Voice, Maximum B Channels, and Circuit-Switched Voice
Limit parameters should be set to 2 to allow both analog ports to be used simultaneously.
Otherwise, if those parameters are set to 1, the ISDN line can only place or receive one call at a
time.
† Flexible Calling (FCO) provides 3-Way Calling (Call Conference), Hold, Drop, and Transfer from
analog equipment attached to the modem.
‡ Additional Call Offering (ACO) allows you to use incoming Dynamic Bandwidth Allocation (DBA) as
well as Call Waiting.
**Caller ID is necessary.to employ the Call Logging feature. If you would like to have Call Logging,
you must order Caller ID. However, Caller ID itself, which requires an external device to monitor
incoming calls, is not supported.
††Call Forwarding allows you to forward calls to another telephone number.
B
AT COMMANDS,
S REGISTERS, AND RESULT
CODES
The 3C882 ISDN modem AT commands are summarized in
Table B-1, S registers in Table B-2, and result codes in
Table B-3.
AT Command Set
Table B-1 summarizes the AT command set for the 3C882
ISDN modem.
Table B-1 AT Command Set Summary
Command Function (Example)
Description
A
Answers an incoming
circuit-switched ISDN modem call
(AT A)
Answers an incoming data call.
$B*
Set baud rate (AT $B57600)
0 — Autobaud (default). Other settings
are 1200, 2400, 4800, 9600, 19200, 38400,
57600, 115200, and 230400. Autobaud
does not exceed 115200. For 230400 you
must send the command
AT $B230400 to the ISDN modem.
%C
Compression
When enabled, compresses data to
improve data transfer times using the
hi/fn compression method.
%C0 disables compression.
%C2 enables compression.
&C
Serial port CD control (AT &C2)
&C0 forces CD to remain on at all times.
&C1 forces CD to follow the state of the
carrier from the remote system. CD turns
on after CONNECT message is sent to
host (default).
&C2 forces CD to remain on except
temporarily after disconnect.
D
(ATD5551234)
Dials an outgoing 56/64 Kbps
circuit-switched digital connection.
B-2
APPENDIX B: AT COMMANDS, S REGISTERS, AND RESULT CODES
Table B-1 AT Command Set Summary (continued)
Command Function (Example)
Description
DD
(ATDD5551234)
Dials an outgoing TollMizer connection.
&D
DTR control (AT &D0)
&D0 causes ISDN modem to ignore DTR
from host.
&D1 causes ISDN modem to enter
command state on detecting on-off
transition of DTR.
&D2 causes ISDN modem to hang up
current calls upon on-off transition of DTR
and prepares serial port to accept AT
command at any speed (default).
E
AT command echo (AT E0)
E0 disables the echo of AT commands
back to the host computer.
E1 enables the echo of AT commands to
the host computer (default).
&F
Restore factory defaults (AT &F)
Restores all factory default settings.
H
Hang up (AT H)
Hangs up the current connections.
I
Identification (AT I)
I displays the model number.
\N
Call Logging
\N displays the five latest incoming and
outgoing calls over the data and analog
ports. \N0 will clear this information.
O
Enter connect state (AT O)
Causes the ISDN modem to go out of
command mode into on-line mode.
Q
Result code control (AT Q0)
Q0 enables the output of result codes
(default).
Q1 disables the output of result codes.
Q2 disables the output of result codes in
answer mode only.
\Q
Serial port flow control (AT \Q1)
\Q0 disables flow control.
\Q1 enables bidirectional XON/XOFF
software flow control.
\Q3 enables bidirectional RTS/CTS
hardware flow control (default).
%R
Read all S registers (AT %R)
Provides an output list of all S registers.
%S
Serial number
Displays serial number of ISDN modem.
Sn?
Read configuration register
(AT S60?)
Reads a specific S register setting.
AT Command Set
B-3
Table B-1 AT Command Set Summary (continued)
Command Function (Example)
Description
Sn=
Write configuration register
(AT S60=64)
Writes to a specific S register.
\S
Read on-line status: command
settings (AT \S)
Reads the status of any parameters that
have been modified through AT
commands and provides call status
information.
\T
Link inactivity timer (AT \T1)
\T0 disables inactivity timer (default).
\Tn link inactivity timer in minutes. The
ISDN modem automatically disconnects
the call if no activity is sensed within n
(n = 0–255) minutes.
V
Result code format (AT V0)
V0 enables short form result codes.
V1 enables long form result codes
(default).
%V
Show version number (AT %V)
Displays ISDN modem firmware version.
W
Displays connection speed
W0 displays COM port rate only (default)
W1 displays COM port and ISDN data rate
W2 displays ISDN data rate only
&W
Stores configuration (AT &W)
Stores the configuration of all S registers
that are not part of the ISDN modem
initial configuration set.
Z
Reset (AT Z)
Disconnects all calls in progress and
performs a complete ISDN modem
system reset.
+++
Enter command state
Causes ISDN modem to enter the
command state if it is currently in the
on-line state.
* To access the Configuration dialog box, the baud rate must be set to Autobaud.
B-4
APPENDIX B: AT COMMANDS, S REGISTERS, AND RESULT CODES
S Registers
Table B-2 provides a complete list and descriptions of the
S registers supported by the 3C882 ISDN modem. All
S registers except S0 are the 3Com extended registers.
S registers notated with an asterisk are stored in nonvolatile
memory and will not be cleared or returned to the default
value if the ISDN modem is powered down.
Table B-2 S Registers
Registers
Descriptions
S0
Auto Answer:
0 — Disabled (default)
X— Number of rings before auto answer (1-255).
S50*
ISDN Switch Signaling Type:
0 — Unknown (default)
1 — AT&T 5ESS Custom
3 — NI1/AT&T 5ESS
6 — NI1/NTI DMS 100 or Siemens EWSD
S51*
Phone #1
S52*
Phone #1 Service Profile ID (SPID)
S53*
Phone #2 (if required by your carrier)
S54*
Phone #2 Service Profile ID (SPID) (if required by your carrier)
S55
Terminal Endpoint Identifier 1:
Stores the first TEI assigned by the switch. A value of 255 indicates no TEI
has been assigned. This field is read-only.
S56
Terminal Endpoint Identifier 2:
Stores the second TEI assigned by the switch if a second directory number is
required by your carrier. A value of 255 indicates no TEI has been assigned.
This field is read-only.
S57
Terminal Initialization State:
Indicates the status of the first TEI using SPID 1. This field is read-only.
0 — ISDN modem has not attempted initialization
1 — ISDN modem has initialized successfully using SPID 1
2 — ISDN modem has failed initialization using SPID 1
S Registers
B-5
Table B-2 S Registers (continued)
Registers
Descriptions
S58
Terminal Initialization State:
Indicates the status of the second TEI using SPID 2. This information is
provided only if your carrier requires a second directory number. This field is
read-only.
0 — ISDN modem has not attempted initialization
1 — ISDN modem has initialized successfully using SPID 2
2 — ISDN modem has failed initialization using SPID 2
S59
U Interface Status:
This field is read-only.
0 — ISDN U interface is not synchronized with the switch
1 — ISDN U interface is synchronized and ready
S60*
B Channel Data Rate:
56 — 56 Kbps (default)
64 — 64 Kbps
S61
Outgoing Call Type:
0 — Follow dial modifiers (default)
1 — Tollmizer (Switched 56 Permissive or Data Over Voice)
2 — ISDN
B-6
APPENDIX B: AT COMMANDS, S REGISTERS, AND RESULT CODES
Table B-2 S Registers (continued)
Registers
Descriptions
S63*
Voice Call Routing
0 — Calls to either analog port are blocked
1 — Phone #1 to Phone port 1 only; Phone #2 calls blocked
2 — Phone #1 to Phone port 2 only; Phone #2 calls blocked
3 — Phone #1 to Phone port 1 or 2; Phone #2 calls blocked
4 — Phone #1 calls blocked; Phone #2 to Phone port 1 only
5 — Phone #1 to Phone port 1 only; Phone #2 to Phone port 1 only
6 — Phone #1 to Phone port 2 only; Phone #2 to Phone port 1 only
7 — Phone #1 to Phone port 1 or 2; Phone #2 to Phone port 1 only
8 — Phone #1 calls blocked; Phone #2 to Phone port 2 only
9 — Phone #1 to Phone port 1 only; Phone #2 to Phone port 2 only
(default)
10 — Phone #1 to Phone port 2 only; Phone #2 to Phone port 2 only
11 — Phone #1 to Phone port 1 or 2; Phone #2 to Phone port 2 only
12 — Phone #1 calls blocked; Phone #2 to Phone port 1 or 2
13 — Phone #1 to Phone port 1 only; Phone #2 to Phone port 1 or 2
14 — Phone #1 to Phone port 2 only; Phone #2 to Phone port 1 or 2
15 — Phone #1 to Phone port 1 or 2; Phone #2 to Phone port 1 or 2
S65
ISDN Call Logging for Voice Calls for Phone Port 1:
Displays the phone number of an incoming voice call over phone port 1.
This field is read-only. To use this feature, you must have Caller ID enabled
on your ISDN line.
S66
ISDN Call Logging for Voice Calls for Phone Port 2:
Displays the phone number of an incoming voice call over phone port 2.
This field is read-only. To use this feature, you must have Caller ID enabled
on your ISDN line.
S67*
ISDN Call Logging for Data Calls:
Displays the phone number of an incoming data call. This field is read-only.
To use this feature, you must have Caller ID enabled on your ISDN line.
S Registers
B-7
Table B-2 S Registers (continued)
Registers
Descriptions
S70*
Dynamic Bandwidth Allocation (DBA):
0 — DBA disabled
1 — DBA enabled for outgoing calls only
2 — DBA enabled for incoming calls only
3 — Enabled for both incoming and outgoing calls (default)
S71
B Channel Protocol:
0 — QuickSelect (default)
1 — Async-Sync PPP conversion
2 — V.120
S73
V.120 Frame Type:
0 — I frame (default)
1 — UI frame
S74
V.120 Maximum Frame Size (range 240–256):
256 — Maximum frame size of 256 (default)
248 — Maximum frame size of 248 (for AdTran compatibility, use 253)
S75
Connection Delay:
Specifies whether the ISDN modem immediately answers a call or waits 2
seconds to answer. If you are using Windows NT, use the two-second delay.
0 — No delay (default)
1 — Two-second delay
S76
ISDN Call Waiting:
0 — Phone 1 Call Waiting Disabled; Phone 2 Call Waiting Disabled
1 — Phone 1 Call Waiting Enabled; Phone 2 Call Waiting Disabled
(default)
2 — Phone 1 Call Waiting Disabled; Phone 2 Call Waiting Enabled
3 — Phone 1 Call Waiting Enabled; Phone 2 Call Waiting Enabled
S77†
Call Conferencing:
0 — Disabled
60 — (default)
S78
Call Transfer:
0 — Disabled
61 — (default)
B-8
APPENDIX B: AT COMMANDS, S REGISTERS, AND RESULT CODES
Table B-2 S Registers (continued)
Registers
Descriptions
S79
Call Drop:
0 — Disabled
62 — (default)
S80*
Multilink PPP:
0 — Disabled
1 — Enabled (default)
S82*
Multilink PPP Endpoint Discriminator Class:
The 3C882 ISDN modem automatically sets the Endpoint Discriminator Class
to 5.
1 — Locally Assigned Address
2 — Internet Protocol (IP) Address
3 — IEEE 802.1 Globally Assigned MAC Address
4 — PPP Magic-Number Block
5 — Public Switched Network Directory Number (default)
S83*
Multilink PPP Endpoint Discriminator Value (up to 20 characters)
By default, the 3C882 ISDN modem automatically sets the Endpoint
Discriminator value to the first telephone number. If your endpoint identifier
class is not 5, obtain the identifier from your service provider and enter that
information in this register.
S84
Challenge Handshake Authentication Protocol (CHAP)
0— Enabled
1— Disabled (default)
* The values of these S registers are stored in nonvolatile memory and will not be cleared or
returned to the default value if the ISDN modem is powered down.
† Users of Pacific Bell ISDN service may need to set S registers 77, 78, and 79 to specific values.
Check with Pacific Bell for the appropriate configurations.
Result Codes
B-9
Result Codes
Table B-3 lists the 3C882 ISDN modem result codes.
Table B-3 3C882 ISDN Modem Result Codes
Short Form
Long Form
Meaning
0
OK
Indicates that the most recent command or
action was successfully completed.
2
RING
Indicates that an incoming call is present and no
AT Answer command is outstanding.
3
NO CARRIER
Indicates that the most recent call attempts did
not establish a call or that the physical ISDN
interface is not operational.
4
ERROR
Indicates that the most recent command or
action was not successfully completed.
6
NO DIALTONE
Indicates the ISDN line is either down or not
initialized.
7
BUSY
Indicates the latest call attempt did not connect
because the remote destination was busy.
8
NO ANSWER
Indicates the location you are calling is not
responding.
5
CONNECT 1200
Indicates 1200 bps serial port connection.
10
CONNECT 2400
Indicates 2400 bps serial port connection.
11
CONNECT 4800
Indicates 4800 bps serial port connection.
12
CONNECT 9600
Indicates 9600 bps serial port connection.
13
CONNECT 7200
Indicates 7200 bps serial port connection.
14
CONNECT 12000
Indicates 12000 bps serial port connection.
15
CONNECT 14400
Indicates 14400 bps serial port connection.
16
CONNECT 19200
Indicates 19200 bps serial port connection.
17
CONNECT 38400
Indicates 38400 bps serial port connection.
18
CONNECT 57600
Indicates 57600 bps serial port connection.
19
CONNECT 115200
Indicates 115200 bps serial port connection.
20
CONNECT 230400
Indicates 230400 bps serial port connection.
56
CARRIER 56000
Indicates 56000 bps ISDN modem connection.
57
CARRIER 56000P
Indicates 56000 bps permissive ISDN modem
connection
64
CARRIER 64000
Indicates 64000 bps ISDN modem connection.
B-10
APPENDIX B: AT COMMANDS, S REGISTERS, AND RESULT CODES
C
SPECIFICATIONS
This appendix describes the physical specifications of the
3C882 ISDN modem and provides the pin assignments of the
RS-232 COM port, PC serial cable, and Macintosh serial cable.
3C882 ISDN Modem Specifications
Network Interface
Integrated Services Digital
Network (ISDN) Basic Rate
telephone service provided by
the telephone company
Physical Interface
U (integrated NT1)
Physical Dimensions
Length 8.66 in. (22.0 cm.)
Width 5.44 in. (13.8 cm.)
Height 1.56 in. (4.0 cm.)
Environmental Operating Range
Operating temperature
50˚ to 122˚F (10˚ to 50˚C)
Relative humidity
Up to 90% noncondensing
Power
Input
Output
110-120 VAC
9 VDC
Ringer Equivalence Number (REN)
3 per analog phone port on
up to 200 feet of AWG 26 or
heavier AWG wiring
EMI Certification
FCC Part 15, Class B
C-2
APPENDIX C: SPECIFICATIONS
RS-232 COM Port Pin Specifications
The asynchronous RS-232-D COM port on the 3C882 ISDN
modem, labeled RS-232, is a standard DB-25 female
connector. The 3C882 ISDN modem asynchronous port pin
assignments, shown in Table C-1, conform to standard
definitions for data communications equipment (DCE).
Table C-1 Pin Descriptions
Pin #
Pin Name
Signal Direction
1
Shield Ground (GND)
—
2
Send Data (SD)
To ISDN modem
3
Receive Data (RD)
From ISDN modem
4
Request to Send (RTS)
To ISDN modem
5
Clear to Send (CTS)
From ISDN modem
6
Data Set Ready (DSR)
From ISDN modem
7
Signal Ground (GND)
—
8
Carrier Detect (DCD)
From ISDN modem
18
Local Loopback
From ISDN modem
20
Data Terminal Ready
(DTR)
To ISDN modem
21
Remote Loopback
To ISDN modem
22
Ring Indicator (RI)
From ISDN modem
PC Serial Cable Pin Specifications
C-3
PC Serial Cable Pin Specifications
The DB-25 male to DB-9 female pin assignments for the PC
serial cable are provided in Table C-2.
Table C-2 PC COM Port Cable Pin Assignments
DB9 Pin #
Pin Name
DB25 Pin #
1
Data Carrier Detect (DCD)
8
2
Receive Data (RD)
3
3
Send Data (SD)
2
4
Data Terminal Ready (DTR)
20
5
Signal Ground (GND)
7
6
Data Set Ready (DSR)
6
7
Request to Send (RTS)
4
8
Clear to Send (CTS)
5
9
Ring Indicator (RI)
22
—
Shield
1
Macintosh Serial Cable Pin Specifications
The DB-25 male to 8-pin DIN male pin assignments for the
Macintosh serial cable are provided in Table C-3.
Table C-3 Macintosh COM Port Cable Pin Assignments
8-Pin DIN
Pin #
Pin Name
DB-25 Pin #
1
Data Terminal Ready (DTR)
20, 4
2
Clear to Send (CTS)
5
3
Send Data (SD)
2
4, 8
Signal Ground (GND)
7
5
Receive Data (RD)
3
7
Data Carrier Detect (DCD)
8
C-4
APPENDIX C: SPECIFICATIONS
D
CONFIGURATION USING
DOS
Configuration Using DOS
To configure the 3C882 ISDN modem for an IBM PC or
compatible computer using DOS, follow these steps.
You will need the ISDN Information Sheet you completed in
Chapter 1.
1 Create a directory on the hard drive, and then insert the
3ComImpact DOS Installation Diagnostic Utilities diskette
into the floppy drive of the PC.
Create a new DOS directory. For example, to create a directory
named 3Com on your C drive at the C:\> DOS prompt, type:
md c:\3Com
2 Copy the INSTALL.EXE and README.TXT files from the
3ComImpact DOS Installation Diagnostic Utilities diskette to
the hard drive.
To copy the INSTALL.EXE file, at the C:\3Com prompt, type:
copy a:\install.exe
To copy the README.TXT file, at the C:\3Com prompt, type:
copy a:\readme.txt
3 Execute INSTALL from the hard drive.
At the C:\> DOS prompt, type:
INSTALL
D-2
APPENDIX D: CONFIGURATION USING DOS
The configuration program launches and then the Port
Settings screen appears. To move the cursor around the
screen, use the [Up Arrow] and [Down Arrow] keys. To select
a parameter, use the [Space Bar].
4 Use the [Space Bar] to select the 3C882 ISDN modem’s
COM port.
When you select the port, a default standard interrupt (IRQ)
associated with that port is automatically chosen.
5 Press [F10] to connect to the 3C882 ISDN modem via the
chosen COM port.
The Configuration screen appears.
6 Select the ISDN switch type.
Your telephone company can provide this information.
7 In the Phone #1 field, enter the telephone number to
which your ISDN modem is connected.
8 Enter the corresponding Service Profile Identifier (SPID) in
the SPID #1 field for the telephone number you entered in
the previous step.
You should have received this SPID from your telephone
company.
9 If you have a second telephone number associated with
your ISDN telephone line (some telephone companies
require two), enter the number and corresponding SPID in
the Phone #2 and SPID #2 fields.
10 Use the [Space Bar] to select (enable) or unselect (disable)
the MLPPP Enable box.
Multilink PPP combines the ISDN B channels, creating a
virtual single digital connection of up to 128 Kbps. Note that
the destination you are dialing must also support
Multilink PPP, or the dual-channel link will not occur and you
will get a single B channel connection.
Configuration Using DOS
D-3
11 Specify which Phone port should handle the calls
associated with telephone number one.
If you plan to use the 3C882 ISDN modem’s analog Phone
ports, you will want to configure voice call routing by
assigning telephone numbers to the analog ports. By default,
telephone number 1 is assigned to phone port one and
telephone number 2 is assigned to phone port 2.
For example, if the first telephone number is configured as
908 555 1212 and only the Phone Port 1 box is checked, then
calls to 908 555 1212 will only ring the analog device
attached to Phone Port 1.
12 If your ISDN line has two telephone numbers, specify
which Phone port should handle the calls associated with
telephone number two.
13 Confirm that the parameters listed in steps 6 through 12
are correct.
When these parameters are updated, the information is read
back to the screen. Check to see that the values have been
correctly entered.
14 Press [F10] to update the information in the ISDN modem.
15 Press [Esc] to return to the main menu.
Once in the main menu, exit the program.
Go to Chapter 5, “Advanced Configuration,” to review the
default settings and ensure that they reflect your preferences.
If you prefer not to change the default settings, go on to
Chapter 7, “Placing and Receiving Calls.”
D-4
APPENDIX D: CONFIGURATION USING DOS
GLOSSARY
Async-Sync PPP Conversion
Asynchronous to synchronous PPP conversion. The 3C882
ISDN modem converts asynchronous PPP into synchronous
(HDLC-based) PPP that can be transported in ISDN
B channels to communications servers that have integrated
ISDN BRI, PRI, or T1 access lines.
AT commands
ATtention Codes. AT commands are used to configure and
operate the 3C882 ISDN modem. These commands can be
sent either automatically or manually through your
communications software.
Autobaud
Automatic baud rate detection. Autobaud automatically
detects the baud rate of your computer’s serial port.
B channel
Bearer channel. In ISDN communications, a B channel
transmits data and voice traffic at a rate of up to 64 Kbps.
BRI
Basic Rate Interface. A BRI line is one of two access methods
to the ISDN. Each BRI consists of two 64 Kbps B channels and
one 16 Kbps D channel for each ISDN line.
Call Drop
Call Drop is a supplementary voice feature that allows you to
remove the last caller added to a conference.
Call Routing
Call Routing allows you to associate a specific telephone
number to a specified analog port.
2
GLOSSARY
CHAP
Challenge Handshake Authentication Protocol. CHAP is one
of two PPP authentication protocols; PAP is the other. An
authentication protocol requests information to verify a valid
user. CHAP is a stronger authentication method because it
uses encryption and may repeatedly request verification of
the identity of the user any time after link establishment.
COM port
The communications port (also referred to as a serial port).
The 3C882 ISDN modem communications port allows a
maximum baud rate of 230.4 Kbps. Note that most computer
COM ports only allow a maximum of 115.2 Kbps. However,
accelerator cards can be purchased to increase the
computer’s COM port rate to 230.4 Kbps.
Compression
Compression is a method of reducing the size of data
packets without losing any information. The 3C882 ISDN
modem automatically compresses data for PPP calls to
improve data transfer times using the hi/fn compression
method.
D channel
The signaling channel on an ISDN line used to carry
messages between the 3C882 ISDN modem and the public
switch.
DBA
Dynamic bandwidth allocation. DBA is a method of
reallocating bandwidth (such as a B channel) automatically.
DBA allows you to place or receive a voice call while a
Multilink PPP call is active.
Default
Value set at the factory.
GLOSSARY
3
Firmware
Firmware is the code that resides in the 3C882 ISDN modem
and controls its behavior. It differs from software in the form
of programs that run on your computer.
ISDN
Integrated Services Digital Network. ISDN provides a digital
telephone service which allows both data and voice
communication over the same telephone line and at
significantly faster speeds than the traditional POTs service.
Two types of lines provide access to ISDN: BRI and PRI.
ISDN Call Logging
ISDN Call Logging displays the five latest incoming and
outgoing numbers over the data and analog ports. To use
this feature, your ISDN line must support Caller ID.
ISDN Call Waiting
ISDN Call Waiting is a supplementary voice feature that
allows you to place a voice call on hold while you answer an
incoming voice call. ISDN Call Waiting requires Additional Call
Offering (ACO) provisioned on your ISDN line.
Kbps
Kilobits per second. The rate at which data is transmitted
between communication equipment such as ISDN modems.
Layer 1
In ISDN communications, the physical layer of
communications between the communication equipment. If
layer 1 is down, there is no ISDN connection between the
devices. The status bar in the 3C882 ISDN modem
Configuration screen indicates layer 1 status.
Multilink PPP
A protocol that provides a method for combining multiple PPP
connections. With a BRI line, Multilink PPP aggregates the two
56 Kbps or 64 Kbps ISDN B channels, creating a virtual single
digital connection of up to 128 Kbps.
4
GLOSSARY
National ISDN
An ISDN standard that enables consistency in ISDN service
features across different vendors’ equipment and switches for
North America.
Network terminator (NT1)
A device that terminates the ISDN line. The NT1 is built into
the 3C882 ISDN modem.
PAP
Password Authentication Protocol. PAP is one of two PPP
authentication protocols; CHAP is the other. An
authentication protocol requests information to verify a valid
user. PAP requests the user’s name and password for
verification.
POTS
Plain old telephone service.
PPP
Point-to-Point Protocol. PPP provides a standard method of
transmitting data through the Internet. PPP is used for
communication between a computer and an Internet service
provider.
PRI
Primary Rate Interface. A PRI line is one of two access
methods to the ISDN. In North America, each PRI consists of
twenty-three 64 Kbps B channels and one 64 Kbps
D channel.
QuickSelect
A built-in feature that automatically detects and uses the
protocol required for each digital call: V.120 or
Async-Sync PPP.
SPID
Service Profile Identifier. If required, this number is supplied
to you by the telephone company. Typically, if your ISDN line
has only one telephone number, a SPID is not required.
GLOSSARY
5
TollMizer
Allows you to place a data call over a voice channel, saving
the extra cost of the data channel. Your telephone company,
ISP, and the device into which you are calling must all
support this feature.
V.120
A rate adaption scheme that converts transmission rates from
a range of 300 bps to 115.2 Kbps to the B channel
56 Kbps or 64 Kbps rate. V.120 is used for communication
between two computers.
6
GLOSSARY
Numerics
3C882 specifications C-1
A
advanced configuration parameters 5-1
analog equipment installation 2-5
analog port
placing calls 7-6
receiving calls 7-6
Apple Macintosh requirements 1-6
Async-Sync PPP 1-3
AT commands
list B-1
placing an ISDN data call 7-2
setting 5-4
AT&T 5ESS Custom switch A-6
AT&T 5ESS NI1 switch A-5
Auto Answer 5-3
Autobaud 5-3
B
B channel data rate 3-10, 4-8, B-5
B channel LEDs 8-5
B1 channel LED 2-3
B2 channel LED 2-3
monitoring 8-3
back panel components 2-2
Baud Rate 5-3
configuring 230K 3-30
C
call
data
placing 7-1
receiving 7-5
voice
placing 7-6
receiving 7-6
Call Conference 6-3
Call Drop 6-4
Call Forwarding 6-1
Call Logging. See ISDN Call Logging
call routing
analog ports for Macintosh 4-11
analog ports for PC using DOS D-3
analog ports for PC using Windows 3-13
Call Transfer 6-4
Call Waiting
Troubleshooting 8-7
Caller ID. See ISDN Call Logging
Challenge Handshake Authentication Protocol (CHAP) 1-4
changing parameter settings 5-4
COM port
connection 2-4
pinout specifications C-2
compression 5-3
configuration
advanced 5-1
Apple Macintosh
FreePPP 4-16
OT/PPP 4-12
changing 5-4
for an Apple Macintosh computer 4-2
using DOS D-1
using Windows 3-1
using Windows 95 3-15
using Windows NT 3.5.1 3-17
using Windows NT 4.0 3-20
Windows 95
230K 3-31
Dial-Up Networking 3-23
Internet Set-Up Wizard 3-24
Windows NT 3.5.1
230K 3-30
Windows NT 4.0
230K 3-31
Dial-Up Networking 3-26
connecting
analog devices 2-5
power cable 2-7
RJ-45/RJ-11 ISDN cable 2-5
serial cable for Macintosh 2-4
serial cable for PC 2-4
conventions 2
notice icons 2
text 2
D
D channel LED 2-3, 8-4
monitoring 8-3
data calls
placing 7-1
receiving 7-5
Data Over Voice. See TollMizer
Data Terminal Ready LED 2-3
Dial-Up Networking
Windows 95 3-23
Windows NT 4.0 3-26
DTR LED
monitoring 8-4
dynamic bandwidth allocation (DBA) 5-2
dynamic bandwith allocation (DBA)
Troubleshooting 8-7
E
environmental operating range C-1
F
front panel
components 2-2
LED indicator definitions 2-2
I
installation 2-1
analog equipment 2-5
Apple Macintosh
configuring Multilink PPP 4-7
configuring the B channel rate 4-8
configuring voice call routing 4-9
running the SPID Wizard 4-3
software 4-2
verifying the configuration 4-11
general steps 2-1
IBM-compatible PC
configuring Multilink PPP 3-9
configuring the B channel rate 3-10
configuring voice call routing 3-10
running the SPID Wizard 3-3
software 3-2
verifying the configuration 3-13
ISDN cable 2-5
power cable 2-7
serial cable 2-3
Windows 95
setup 3-15
Windows NT 3.5.1 RAS
setup 3-17
Windows NT 4.0
setup 3-20
Internet Setup Wizard 3-24
ISDN 1-1
Information Sheet 1-7
ordering service
for AT&T 5ESS Custom A-6
for AT&T 5ESS NI1 A-5
for Northern Telecom DMS 100 A-7
for Siemens EWSD A-8
placing data calls 7-1
receiving data calls 7-5
ISDN cable installation 2-5
ISDN Call Logging 7-7
L
LEDs
B1 channel 2-3
B2 channel 2-3
D channel 2-3
Data Terminal Ready 2-3
description 2-2
monitoring 8-2
Power 2-2
Receive Data 2-3
Self-Test/Status 2-2
Send Data 2-3
M
Macintosh
Configuring Internet Access 4-12
Macintosh requirements 1-6
Microkey error codes 8-8
Multilink PPP
configuration for DOS D-2
configuration for Macintosh 4-7
configuration for Windows 3-9
placing a call 7-3
N
network interface C-1
Northern Telecom DMS 100 switch A-7
NT1 1-3, 2-5
O
ordering ISDN service
for AT&T 5ESS Custom A-6
for AT&T 5ESS NI1 A-5
for Northern Telecom DMS 100 A-7
for Siemens EWSD A-8
P
package contents 1-4
parameter settings
changing 5-4
Password Authentication Protocol (PAP) 1-4
PC requirements 1-6
Phone port 2-5, 3-10, 4-9
physical dimensions C-1
placing calls 7-1
data 7-1
using AT commands 7-2
using TollMizer 7-4
voice 7-6
Plug and Play setup with Windows 95 3-15
power cable connection 2-7
Power LED 2-2
power requirements C-1
PPP protocol 1-2
Q
QuickSelect 1-2, 5-2
R
RD LED
monitoring 8-3
Receive Data LED 2-3
Receive Date (RD) LED 8-3
receiving calls
data 7-5
voice 7-6
requirements
Apple Macintosh computer 1-6
IBM or compatible PC 1-6
result codes B-9
ringer equivalence number C-1
S
S registers B-4
Self-Test/Status LED 2-2
Send Data (SD) LED
monitoring 8-3
Send Data LED 2-3
serial cable installation 2-3
serial port 1-3
connection for Macintosh 2-4
connection for PC 2-4
Siemens EWSD switch A-8
specifications C-1
SPID Wizard 4-3
Switch 56 Permissive. See TollMizer
switch type A-5 to A-8
T
Test LED 8-2, 8-4
TollMizer 7-4
placing a call 7-4
troubleshooting 8-1
checking the basics 8-2
evaluating symptoms and solutions 8-4
Microkey error codes 8-8
monitoring LEDs 8-2
V
V.120 protocol 1-2
voice calls
placing 7-6
receiving 7-6
Voice Features
Call Conference 6-3
Call Drop 6-4
Call Forwarding 6-1
Call Transfer 6-4
Call Waiting 6-2
Voice Services
Drop 6-4
W
warranty 1-4
Windows 95
Plug and Play setup 3-15
Windows NT 3.5.1 3-17
Windows NT 4.0 3-20
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One year
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Lifetime*
(One year if
not registered)
One year
One year
90 days
If a product does not operate as warranted above during the applicable warranty period, 3Com
shall, at its option and expense, repair the defective product or part, deliver to Customer an
equivalent product or part to replace the defective item, or refund to Customer the purchase
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3Com. Replacement products may be new or reconditioned. Any replaced or repaired product or
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that all defects in the software products will be corrected. For any third party products listed in
the 3Com software product documentation or specifications as being compatible, 3Com will
make reasonable efforts to provide compatibility, except where the non-compatibility is caused
by a “bug” or defect in the third party's product.
STANDARD WARRANTY SERVICE: Standard warranty service for hardware products may be
obtained by delivering the defective product, accompanied by a copy of the dated proof of
purchase, to 3Com's Corporate Service Center or to an Authorized 3Com Service Center during
the applicable warranty period. Standard warranty service for software products may be
obtained by telephoning 3Com's Corporate Service Center or an Authorized 3Com Service Center,
within the warranty period. Products returned to 3Com's Corporate Service Center must be
pre-authorized by 3Com with a Return Material Authorization (RMA) number marked on the
outside of the package, and sent prepaid, insured, and packaged appropriately for safe shipment.
The repaired or replaced item will be shipped to Customer, at 3Com's expense, not later than
thirty (30) days after receipt of the defective product by 3Com.
WARRANTIES EXCLUSIVE: IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE,
CUSTOMER'S SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR, REPLACEMENT,
OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S OPTION. TO THE FULL EXTENT ALLOWED
BY LAW, THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL
OTHER WARRANTIES, TERMS, OR CONDITIONS, EXPRESS OR IMPLIED, EITHER IN FACT OR BY
OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES, TERMS, OR
CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND SATISFACTORY
QUALITY. 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT
ANY OTHER LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE OR USE OF
ITS PRODUCTS.
3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION
DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY
CUSTOMER'S OR ANY THIRD PERSON'S MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING,
UNAUTHORIZED ATTEMPTS TO REPAIR OR MODIFY, OR ANY OTHER CAUSE BEYOND THE RANGE
OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD.
LIMITATION OF LIABILITY: TO THE FULL EXTENT ALLOWED BY LAW 3COM ALSO EXCLUDES FOR
ITSELF AND ITS SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR TORT (INCLUDING
NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGES OF
ANY KIND, OR FOR LOSS OF REVENUE OR PROFITS, LOSS OF BUSINESS, LOSS OF INFORMATION OR
DATA, OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE,
INSTALLATION, MAINTENANCE, USE, PERFORMANCE, FAILURE, OR INTERRUPTION OF ITS
PRODUCTS, EVEN IF 3COM OR ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY
OF SUCH DAMAGES, AND LIMITS ITS LIABILITY TO REPAIR, REPLACEMENT, OR REFUND OF THE
PURCHASE PRICE PAID, AT 3COM'S OPTION. THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL
NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE.
Some countries, states, or provinces do not allow the exclusion or limitation of implied warranties
or the limitation of incidental or consequential damages for certain products supplied to
consumers, so the above limitations and exclusions may be limited in their application to you.
This warranty gives you specific legal rights which may vary depending on local law.
GOVERNING LAW: This Limited Warranty shall be governed by the laws of the state of California.
3Com Corporation
5400 Bayfront Plaza
Santa Clara, CA 95052-8145
(408) 764-5000
IMPORTANT: Read Before Using This Product
3COM END USER SOFTWARE LICENSE AGREEMENT
YOU SHOULD CAREFULLY READ THE FOLLOWING TERMS AND CONDITIONS BEFORE OPENING OR
USING THIS PRODUCT. IT CONTAINS SOFTWARE, THE USE OF WHICH IS LICENSED BY 3COM
CORPORATION (“3COM”) TO ITS CUSTOMERS FOR THEIR USE ONLY AS SET FORTH BELOW.
OPENING THIS PACKAGE OR USING ANY PART OF THE SOFTWARE INDICATES THAT YOU ACCEPT
THESE TERMS. IF YOU DO NOT AGREE TO THE TERMS AND CONDITIONS OF THIS AGREEMENT,
RETURN THIS ENTIRE PACKAGE UNOPENED OR WITH THE SOFTWARE UNUSED TO 3COM OR THE
LOCATION WHERE YOU OBTAINED IT.
LICENSE: 3Com grants you a nonexclusive license to use the accompanying software program(s)
(the “Software”) subject to the terms and restrictions set forth in this License Agreement. Except
as provided below, this License Agreement does not grant you any rights to patents, copyrights,
trade secrets, trademarks, or any other rights in respect to the Software.
The Software is licensed to be used on ONE (1) WORKSTATION owned by or leased to you for use
only in connection with a 3ComImpact IQ External ISDN Modem. One (1) copy of the Software
may be made for backup or archive purposes in support of your use of the Software on a single
workstation. You may not reproduce the supporting documentation accompanying the Software.
You must reproduce and include the copyright notice(s) and any other proprietary rights notices
appearing on any copy that you make.
ASSIGNMENT; NO REVERSE ENGINEERING: You may transfer the Software and license to
another party in the same country in which you obtained the Software if the other party agrees in
writing to accept the terms and conditions of this License Agreement. If you transfer the
Software, you must at the same time either transfer any copies of the Software as well as the
supporting documentation to the same party or destroy any such materials not transferred.
Except as set forth above, you may not assign your rights under this License Agreement.
Modification, reverse engineering, reverse compiling, or disassembly of the Software is expressly
prohibited. However, if you are a European Community (“EC”) resident, information necessary to
achieve interoperability of the Software with other programs within the meaning of the EC
Directive on the Legal Protection of Computer Programs is available to you from 3Com upon
written request.
EXPORT RESTRICTIONS: You agree that you will not export or re-export the Software or
accompanying documentation (or any copies thereof) or any products utilizing the Software or
such documentation in violation of any applicable laws or regulations of the United States or the
country in which you obtained them.
TRADE SECRETS; TITLE: You acknowledge and agree that the structure, sequence and
organization of the Software are the valuable trade secrets of 3Com and its suppliers. You agree
to hold such trade secrets in confidence. You further acknowledge and agree that ownership of,
and title to, the Software and all subsequent copies thereof regardless of the form or media are
held by 3Com and its suppliers.
UNITED STATES GOVERNMENT LEGENDS:
For units of the Department of Defense:
The Software is commercial computer software as defined in 48 C.F.R. 211 and therefore is
provided to units of the Department of Defense under the terms of this License Agreement,
which is 3Com's standard commercial agreement for the Software. In the alternative, if 48 C.F.R.
211 is not invoked, the Software is licensed as follows: Restricted Rights Legend: Use, duplication
or disclosure by the United States Government is subject to restrictions as set forth in
subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software Clause at 48 C.F.R.
52.227-7013. 3Com Corporation, 5400 Bayfront Plaza, Santa Clara, California 95052-8145.
For civilian agencies:
Restricted Rights Legend: Use, reproduction or disclosure is subject to restrictions set forth in
subparagraph (a) through (d) of the Commercial Computer Software - Restricted Rights clause at
48 C.F.R. 52.227-19 and the limitations set forth in 3Com's standard commercial agreement for
the Software. Unpublished rights reserved under the copyright laws of the United States.
TERM AND TERMINATION: This license will expire fifty (50) years from the date that you open
the package, if it is not earlier terminated. You may terminate it at any time by destroying the
Software and documentation together with all copies and merged portions in any form. It will
also terminate immediately if you fail to comply with any term or condition of this License
Agreement. Upon such termination you agree to destroy the Software and documentation,
together with all copies and merged portions in any form.
GOVERNING LAW: This License Agreement shall be governed by the laws of the State of
California as such laws are applied to agreements entered into and to be performed entirely
within California between California residents and by the laws of the United States. You agree
that the United Nations Convention on Contracts for the International Sale of Goods (1980) is
hereby excluded.
LIMITED WARRANTY; LIMITATION OF LIABILITY: All warranties and limitations of liability
applicable to the Software are as stated on the Limited Warranty Card or in the product manual
accompanying the Software. Such warranties and limitations of liability are incorporated herein
in their entirety by this reference.
SEVERABILITY: In the event any provision of this License Agreement is found to be invalid,
illegal or unenforceable, the validity, legality and enforceability of any of the remaining provisions
shall not in any way be affected or impaired and a valid, legal and enforceable provision of similar
intent and economic impact shall be substituted therefor.
ENTIRE AGREEMENT: This License Agreement sets forth the entire understanding and
agreement between you and 3Com and may be amended only in a writing signed by both
parties.
3Com is a registered trademark of 3Com Corporation.
3Com Corporation
5400 Bayfront Plaza
Santa Clara, CA 95052-8145
(408) 764-5000
FCC CLASS B CERTIFICATION STATEMENT
3Com Corporation
Model No: 3C882
FCC ID: DF63C882
Made in U.S.A.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
1 this device may not cause harmful interference, and
2 this device must accept any interference received, including interference that may cause
undesired operation.
WARNING: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules, and the Canadian Department of
Communications Equipment Standards entitled, “Digital Apparatus,” ICES-003. These limits are
designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
■
Reorient or relocate the receiving antenna.
■
Increase the separation between the equipment and receiver.
■
Connect the equipment into an outlet on a circuit different from the one which the receiver is
connected to.
■
Consult the dealer or an experienced radio/TV technician for help.
The user may find the following booklet prepared by the Federal Communications Commission
helpful:
The Interference Handbook
This booklet is available from the U.S. Government Printing Office, Washington, D.C. 20402. Stock
No. 004-000-00345-4.
NOTE: In order to maintain compliance with the limits of a Class B digital device, 3Com requires
that you use quality interface cables when connecting to this device. Changes or modifications
not expressly approved by 3Com could void the user’s authority to operate this equipment. Refer
to the manual for specifications on cabling types.
CANADIAN NOTICE
The Industry Canada label identifies certified equipment. This certification means that the
equipment meets certain telecommunications network protective, operation, and safety
requirements. The Department does not guarantee the equipment will operate to the users’
satisfaction.
Before installing this equipment, users should ensure that is permissible to be connected to the
facilities of the local telecommunications company. The equipment must also be installed using
an acceptable method of connection. In some cases, the inside wiring associated with a
single-line individual service may be extended by means of a certified connector assembly. The
customer should be aware that compliance with the above conditions may not prevent
degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility
designated by the supplier. Any repairs or alterations made by the user to this equipment, or
equipment malfunctions, may give the telecommunications company cause to request the user
to disconnect the equipment.
Users should ensure for their own protection that the electrical ground connections of the power
utility, telephone lines, and internal metallic water pipe system, if present, are connected
together. This precaution may be particularly important in rural areas.
CAUTION: Users should not attempt to make electrical ground connections by
themselves, but should contact the appropriate inspection authority or an electrician,
as appropriate.