ADC 500L Network Card User Manual

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MEGABIT MODEM
Megabit
Modem
Model 500L
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User Manual
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PRELIMINARY
PairGain Technologies cannot assume responsibility for any consequences
resulting from the use of this product or documentation. The information
contained herein is subject to change.
PairGain reserves the right to change features and specifications
without notice.
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July 1999 (Preliminary)
© Copyright 1999 PairGain Technologies, Inc.
PairGain and Megabit Modem are registered trademarks, and AccessGain, PriorityVoice, InstaConnect,
EasySession, and DSLview are trademarks of PairGain Technologies, Inc. AVIDIA is a registered trademark
of PairGain Wallingford Design Center, Inc.
Information contained in this document shall not be modified, used, copied, reproduced or disclosed in
whole or in part without the written consent of PairGain Technologies, Inc.
Other product names mentioned in this practice are used for identification purposes only and may be
trademarks or registered trademarks of their respective companies.
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Megabit Modem 500L Installation Manual
PRELIMINARY
About This User Manual
ABOUT THIS USER MANUAL
Use this manual to install and configure the PairGain® Megabit Modem 500L™. The manual
provides instruction on:
information you will need to configure the modem
•
unpacking and inspecting the modem for installation
•
installing the modem
•
setting up parameters for your applications that will be used to configure the modem
•
configuring system parameters
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configuring sessions between the modem and a service provider
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monitoring and troubleshooting the modem
Chapter 9 provides a reference for technology implemented in the Megabit Modem 500L. The
chapter covers information about ATM over ADSL transmission, PPP over ATM operating
mode, and SNMP management.
IP addresses used in this manual are for example only. You will acquire your own addresses
from the service provider and your information services coordinator to configure the Megabit
Modem 500L. However, you must use the IP address specified in “Accessing Megabit Modem
500L Web Pages” on page 20 to access the Megabit Modem 500L from a Web browser.
DOCUMENT CONVENTIONS
Two types of messages, identified by icons, appear in the text.
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Notes contain information about special circumstances.
Cautions indicate the possibility of equipment damage or the possibility of
personal injury.
Megabit Modem 500L Installation Manual
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Suggestions and Corrections to this Manual
PRELIMINARY
SUGGESTIONS AND CORRECTIONS TO THIS MANUAL
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Your comments help us prepare better user documentation. If you have comments about this
manual, send an email containing the comment(s), page reference, and any other pertinent
information to:
technical_publications@pairgain.com
In the email subject area, provide the product name and the name and date of the document
about which you are commenting.
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If you have questions about the product or warranty, see Appendix B on page 69 for information
about whom to contact.
PRODUCT CERTIFICATIONS
FCC
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with this instruction manual, may cause harmful interference to radio
communication.
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.
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Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
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Consult the dealer or an experienced radio/TV technician for help.
UL
This product meets all safety requirements per UL-1950 standard.
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Megabit Modem 500L Installation Manual
PRELIMINARY
Table of Contents
TABLE OF CONTENTS
Chapter 1: About The Product _______________________________________________ 1
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Features................................................................................................................................2
Applications.........................................................................................................................3
Connection to a Remote Office.............................................................................3
Internet Access for Users at Home........................................................................4
Chapter 2: What You Need To Start __________________________________________ 5
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Verify Package Contents .....................................................................................................5
Requirements For Your System ..........................................................................................6
Requirements For The Installation Site ...............................................................................6
Location for Modem Installation .......................................................................... 6
Phone Service........................................................................................................9
What You Need from Your Service Provider ..................................................................... 9
Choose a Power Cable.........................................................................................................9
Chapter 3: Installing the Modem ____________________________________________ 11
Attaching the Feet..............................................................................................................12
Setting the MDI/MDI-X Switch ........................................................................................13
Installing Cabling ..............................................................................................................14
Setting Up ADSL Service .................................................................................................15
Checking LED Indications ................................................................................................15
Connecting Phone Service.................................................................................................16
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Chapter 4: Setting Up For Configuration _____________________________________ 17
Setting Up the PC to Request an IP Address.....................................................................18
Configuring a Web Browser.............................................................................................. 19
Accessing Megabit Modem 500L Web Pages................................................................... 20
Megabit Modem 500L Installation Manual
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Table of Contents
PRELIMINARY
Saving the Configuration ...................................................................................................21
Saving the Configuration to NVRAM.................................................................22
Resetting the Modem to Factory Defaults...........................................................23
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Resetting the Modem...........................................................................................25
Chapter 5: Configuring System Settings ______________________________________27
Defining TFTP Parameters ................................................................................................28
Defining SNMP Parameters...............................................................................................29
Setting the Time and Date .................................................................................................31
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Chapter 6: Configuring Sessions _____________________________________________33
Selecting a Configuration Model.......................................................................................34
Configuring PPP over ATM Sessions ...............................................................................35
Configuring the WAN .........................................................................................36
Configuring the LAN ..........................................................................................39
Saving the Configuration.....................................................................................42
Activating and De-Activating Sessions .............................................................................43
Activating Sessions .............................................................................................43
De-Activating Sessions .......................................................................................44
Chapter 7: Viewing Statistics________________________________________________45
Viewing ADSL Status .......................................................................................................45
Viewing Network Statistics ...............................................................................................48
LAN Statistics .....................................................................................................48
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WAN Statistics ....................................................................................................50
Chapter 8: Maintenance and Troubleshooting _________________________________51
Maintenance.......................................................................................................................51
Updating Software...............................................................................................51
Troubleshooting .................................................................................................................53
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Megabit Modem 500L Installation Manual
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Table of Contents
Chapter 9: Technical Reference _____________________________________________ 55
Transmission on the Wide Area Network ......................................................................... 55
ADSL ..................................................................................................................55
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ATM....................................................................................................................56
PPP .................................................................................................................................... 56
PAP/CHAP Authentication Security................................................................... 57
NAT..................................................................................................................... 57
Management Protocols ......................................................................................................58
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SNMP ..................................................................................................................58
Megabit Modem 500L SNMP Agent.................................................................. 58
MIB and Trap Support ........................................................................................59
DNS Resolution................................................................................................................. 59
TFTP Server ...................................................................................................................... 59
Appendix A: Specifications and Data _________________________________________ 61
WAN Interface Specifications...........................................................................................61
Encapsulation ....................................................................................................................62
LAN Interface....................................................................................................................62
Physical Specifications ......................................................................................................62
Power Supply..................................................................................................................... 63
Environmental ...................................................................................................................63
Compliance........................................................................................................................63
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RFCs ..................................................................................................................................64
MIBs ..................................................................................................................................64
Rate vs. Reach ...................................................................................................................65
Hardware ........................................................................................................................... 66
Installation Kit..................................................................................................... 66
Connector Pinouts ............................................................................................... 67
Megabit Modem 500L Installation Manual
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Table of Contents
PRELIMINARY
Appendix B: Technical Assistance and Warranty _______________________________69
Technical Support ..............................................................................................................69
World-Wide Web...............................................................................................................69
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Limited Warranty...............................................................................................................70
Advance Replacement .......................................................................................................71
Billing ................................................................................................................................71
Returning a Product ...........................................................................................................71
Appendix C: Configuration Worksheets _______________________________________73
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Configuration Information .................................................................................................73
Appendix D: Glossary ______________________________________________________75
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Appendix E: Index _________________________________________________________81
viii
Megabit Modem 500L Installation Manual
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You have purchased the PairGain Megabit Modem 500L
that connects your Ethernet LAN to service providers for
instant and high-speed access to the Internet or to other
types of Wide Area Network (WAN) applications. The
modem provides this service over a single-pair telephone
line with downstream ADSL transmission up
to 1.5 Mbps. The upstream ADSL transmission is up to
512 kbps. You can also receive telephone service over the
same single-pair line as your data.
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ABOUT THE PRODUCT
The Megabit Modem 500L uses ATM over DMT ADSL technology to provide this high-speed
transmission between the modem and the service provider. Asynchronous Transfer Mode
(ATM) provides transmission of fixed-size cells over preestablished connections. The
Asymmetric Digital Subscriber Line (ADSL) provides rate-adaptive transmission which means
the service provider can deliver the best possible transmission rate to you based on distance and
line conditions.
The Megabit Modem 500L is easy to install and configure. To install the modem, you:
•
connect a telephone cable from the modem to a wall phone jack for ADSL service
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connect a cable from the modem to a PC or an Ethernet hub for LAN service
•
connect a power cable to a local power source
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To configure the modem, launch a Web browser on your PC and load the Megabit Modem
Configuration and Management Tool Web pages that guide you through configuration. Use the
Web page called EasySession™ to configure up to 3 Internet or other WAN sessions with
service providers (you can activate only one session at a time). You can also configure other
system parameters and monitor ADSL, LAN, and other networking functions using the Web
pages.
DSLview™ LEDs on the modem front panel provide continual status at-a-glance for network
and modem connections.
Megabit Modem 500L Installation Manual
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Features
PRELIMINARY
FEATURES
The Megabit Modem 500L provides:
rate-adaptable ADSL transmission downstream at up to 1.5 Mbps and upstream at
up to 512 kbps
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Internet or other types of WAN applications and phone service over your existing
phone line
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Point-to-Point Protocol (PPP) encapsulation method
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Password and Challenge-Handshake Authentication Protocols (PAP/CHAP) for
authentication of PPP sessions
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Network Address Translation (NAT) protocol to map the user to the PPP session
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Dynamic Host Configuration Protocol (DHCP) server to provide network configuration
information including IP addresses to LAN devices
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TFTP to download software
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AccessGain™ software to provide access through an HTTP server to configure, manage,
and monitor the modem through a Web-based interface
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SNMP agent for management through any industry standard SNMP platform
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autodetecting 10/100BASE-T Ethernet port for connection to the LAN
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DSLview™ LEDs to provide continual status at-a-glance of power, LAN, and
ADSL connections
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ATM technology with three virtual channels to allow one active Internet or other
WAN application session at a time
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PriorityVoice™ to allow full deployment of the modem without splitters or microfilters
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InstaConnect™ to sense phone activity and optimizes performance
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On a Megabit Modem 500L, you can configure three PPP over ATM sessions. However, you
can enable only one of the sessions at a time. You assign the user to the session that is active.
Chapter 9 on page 55 provides more information about the technologies implemented in the
Megabit Modem 500L.
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Megabit Modem 500L Installation Manual
PRELIMINARY
Chapter 1: About The Product
APPLICATIONS
Connection to a Remote Office
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The Megabit Modem 500L provides a practical solution for many networking applications.
The following illustrations show some of the many possible solutions when using the Megabit
Modem 500L.
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You can work at home or at a remote office and have a connection to a corporate office network.
Megabit Modem 500L Installation Manual
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Applications
PRELIMINARY
Internet Access for Users at Home
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You can connect an at home user to the Internet.
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Megabit Modem 500L Installation Manual
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WHAT YOU NEED TO START
This chapter identifies the preparations and prerequisites for installing the Megabit Modem
500L. To install the modem, verify that:
the contents of the package are as described on this page
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your system meets requirements for connecting to and configuring the modem
(see “Requirements For Your System” on page 6)
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your facility meets installation site requirements (see “Requirements For The Installation
Site” on page 6)
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the configuration parameters are available from your service provider (see “What You
Need from Your Service Provider” on page 9)
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VERIFY PACKAGE CONTENTS
As you unpack the Megabit Modem 500L, visually inspect the container for signs of damage.
If the equipment was damaged in transit, report the damage to the transportation company and
to the sales representative.
Check the contents of the package for the Megabit
Modem 500L and the following:
one black cable
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one grey phone cord
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four rubber, self-adhesive feet
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two screws
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power supply and optional power cord
(see “Choose a Power Cable” on page 9 for
options)
If you need to store the modem for a prolonged period, store it in the original antistatic bag
and packaging. Observe environmental specifications as stated on page 63.
Megabit Modem 500L Installation Manual
5
Requirements For Your System
PRELIMINARY
REQUIREMENTS FOR YOUR SYSTEM
You need the following hardware and software to complete the installation and configuration of
the Megabit Modem 500L:
PC with an Ethernet Network Interface Card (NIC)
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TCP/IP network protocol stack (see your documentation for your operating system)
•
Web browser installed such as Netscape® or Internet Explorer® version 4.0 or higher
•
Ethernet hub (optional)
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REQUIREMENTS FOR THE INSTALLATION SITE
To install the Megabit Modem 500L, you must:
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select a location to install the modems as described in the section “Location for Modem
Installation” on this page
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if you get phone service, identify requirements to connect phones as described in the
section “Phone Service” on page 9
Location for Modem Installation
You can install the modem either:
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placed on a flat surface (shown on page 7)
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mounted on a wall (shown on page 8)
Your facility must have the following minimum site requirements to install each modem:
power outlet
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RJ-11 wall jack that has DMT ADSL service available
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Megabit Modem 500L Installation Manual
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Chapter 2: What You Need To Start
Flat-Surface Mount
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Do not stack the modems when installing on a flat surface. The modems do not
dissipate heat properly when stacked.
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Place the modems on a flat surface, such as on a table or in a rack.
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Minimum
1-inch clearance
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Minimum
1-inch clearance
Megabit Modem 500L Installation Manual
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Requirements For The Installation Site
PRELIMINARY
Wall Mount
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Ensure the minimum dimensions (shown in the illustration) for spacing
between modems are met to allow for heat dissipation, viewing of front panel
LEDs, and cabling.
Mount the modems on a wall using the hardware included in the installation kit.
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3" to 4"
4.85"
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Min. 3"
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Megabit Modem 500L Installation Manual
PRELIMINARY
Chapter 2: What You Need To Start
Phone Service
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If you get phone service, all you need is an RJ-11 phone jack to connect your phone. This
lite-rate modem provides splitterless capability, which allows reception of phone service
without special splitters or filters; simply connect your phone.
WHAT YOU NEED FROM YOUR SERVICE PROVIDER
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Use the worksheets, provided in Appendix C on page 73, to record your configuration
information. When you begin to configure the modem in Chapter 4 on page 17, the procedures
refer you to the proper table for the configuration information that you recorded.This section
lists the information you need to configure system settings and sessions for the modem. Contact
your service provider for this information.
1
If using CHAP, the CHAP authentication name for each session.
2
Session address for Ports 1 through 3 (WAN configuration):
•
ATM VPI and ATM VCI (specified for each session)
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when using fixed IP addresses, IP address specified for each session by the
service provider
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Login Name and Login Password (specified for each session)
For more information about the configuration choices listed above, see Chapter 9 on page 55.
CHOOSE A POWER CABLE
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The Megabit Modem 500L is available with a variety of power supplies and power cords. When
you order your modem, choose one of the following as the last number in the product part
number (150-2120-7x) for your order to indicate which power option you need:
•
2 indicates a power supply for International use and does not include a power cord.
•
3 indicates a power supply for North American use and includes a North American
power cord.
•
4 indicates a Universal power supply and includes a European power cord.
•
5 indicates a Universal power supply and includes a UK/Ireland power cord.
Megabit Modem 500L Installation Manual
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Choose a Power Cable
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Megabit Modem 500L Installation Manual
The Megabit Modem 500L is easy to install by:
attaching adhesive-backed feet
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INSTALLING THE MODEM
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setting the MDI/MDI-X switch
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connecting a cable from the modem to a PC or an Ethernet hub for LAN service
•
connecting a phone cord from the modem to a wall phone jack for DMT ADSL Internet
or other WAN application service
•
connecting a power cable to a local power outlet
Perform the installation on the following pages (see “Location for Modem Installation” on
page 6 to determine where to place modems). Use the installation kit parts listed below in
the installation procedures.
Function
Rubber adhesive-backed
feet (four)
Attaches to the base of the modem.
Black cable
Connects the modem 10/100BASE-T connector to the LAN through a hub
or to a PC NIC.
Grey cord
Connects the modem ADSL connector to the RJ-11 wall jack with DMT
ADSL service.
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Part
Power cable
Connects the modem Power connector to the local power source. Power
supply optionally has a power cord. (See “Choose a Power Cable” on
page 9 for selection options.)
Megabit Modem 500L Installation Manual
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Attaching the Feet
PRELIMINARY
ATTACHING THE FEET
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Attach each of the four adhesive-backed rubber feet to a footprint recess on the bottom of
the modem.
Rubber feet
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Recess
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Megabit Modem 500L Installation Manual
PRELIMINARY
Chapter 3: Installing the Modem
SETTING THE MDI/MDI-X SWITCH
Set the switch for the 10/100BASE-T port to either:
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Using the MDI/MDI-X switch, the Megabit Modem 500L can communicate with a device on
the LAN that is either MDI or MDI-X without having to change the cable (a straight-through
cable is supplied with the installation kit).
MDI-X when you are connecting to a device with an MDI port such as a PC with an
Ethernet NIC
•
MDI when you are connecting to a device with an MDI-X port such as a hub, repeater,
bridge, or router
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For connection to
devices such as
a PC
MDI-X
For connection to
devices such as
a Hub
MDI
MDI-X
10BASE-T
DSL
POWER
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MDI
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Installing Cabling
PRELIMINARY
INSTALLING CABLING
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Install the black cable for the 10/100BASE-T LAN connection, grey phone cord for the ADSL
port WAN connection, and the power cable to the power connector.
.
Megabit Modem 500L
PC, hub or other
network device
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10/100 BASE-T port
MD
I
MD
ADSL port
I- X
10
BA
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-T
Power
connector
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Wall jack with DMT ADSL
service
To power
outlet
If you need pinouts for the ADSL and 10/100BASE-T connectors, see “Connector Pinouts” on
page 67.
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Megabit Modem 500L Installation Manual
PRELIMINARY
Chapter 3: Installing the Modem
SETTING UP ADSL SERVICE
CHECKING LED INDICATIONS
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The service provider sets up the ADSL parameters for your service. The modem must have
the ADSL SYNC LED lit before you can connect sessions with your service provider. Verify
SYNC in the following section, “Checking LED Indications.”
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The following table describes LED indications for all operational modes. LEDs on the modem
front panel (page 16) provide continual status at-a-glance for network and modem connections.
LED
State
Description
PWR
On green
Modem has power.
Off
Modem does not have power.
LAN
LINK
TX
RX
On green
A PC, hub, or other network device is connected to the modem
10/100BASE-T interface.
Off
No device is connected to the modem 10/100BASE-T interface.
Flashing green
Modem is transmitting data to devices on the LAN.
Off
Modem is not transmitting data to the LAN.
Flashing green
Modem is receiving data from devices on the LAN.
Off
Modem is not receiving data from the LAN.
ADSL
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SYNC
TX
RX
MAR
OH
On green
ADSL transceiver is synchronized and in normal operation mode.
Flashing green
ADSL transceiver is in a start-up sequence.
Off
ADSL transceiver is not synchronized or is in a mode other than
normal operation or start-up.
Flashing green
Modem is transmitting data to the service provider.
Off
Modem is not transmitting data to the service provider.
Flashing green
Modem is receiving data from the service provider.
Off
Modem is not receiving data from the service provider.
On green
ADSL margin is at or above the value set by the service provider.
Off
ADSL margin is below the value set by the service provider.
On yellow
Telephone receiver is off hook.
Off
Telephone receiver is on hook.
Megabit Modem 500L Installation Manual
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Connecting Phone Service
PRELIMINARY
M E G A B I T MODEM 500L
ADSL
LAN
LINK
TX
RX
SYNC
Status LEDs
CONNECTING PHONE SERVICE
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RX
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OH
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PWR
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If you get phone service, all you need is an RJ-11 phone jack to connect your phone. This
lite-rate modem provides splitterless capability, which allows reception of phone service
without special splitters or filters; simply connect your phone.
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Megabit Modem 500L Installation Manual
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SETTING UP FOR CONFIGURATION
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You set up a PC and a Web browser to configure the Megabit Modem 500L. This chapter
provides the set up procedures, then shows you how to access and navigate the Megabit Modem
500L Web pages. The configuration process flow is shown below.
START
Setting Up the PC to Request an IP
Address
Chapter 4 on page 17
Chapter 4 on page 19
Configuring a Web Browser
Chapter 4 on page 20
Accessing Megabit Modem 500L
Chapter 5 on page 27
Configuring System Settings
•
•
•
Defining TFTP Parameters
Defining SNMP Parameters
Setting the Time and Date
Chapter 6 on page 33
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Configuring PPP over ATM Sessions
•
•
•
•
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Megabit Modem 500L Installation Manual
Configuring the WAN
Configuring the LAN
Defining Static NAT Entries
Saving the Configuration
Activating and Deactivating
Sessions
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Setting Up the PC to Request an IP Address
PRELIMINARY
SETTING UP THE PC TO REQUEST AN IP ADDRESS
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You configure the Megabit Modem 500L using a PC connected to the 10/100BASE-T port.
The PC must be set to obtain an IP address automatically from the modem. The modem, as a
Dynamic Host Configuration Protocol (DHCP) server, provides an IP address to this PC
dynamically.
The following is an example of how to set up the PC using Microsoft® Windows® 95. If you
use an application other than Windows 95, refer to the appropriate operating system user
documentation.
.Open the Control Panel window and double-click on the Network icon
shown at right.
2
In the Network dialog (shown below), double-click TCP/IP under the
Configuration tab (or highlight TCP/IP then click Properties).
3
On the IP Address tab, select Obtain an IP address automatically, then click OK.
4
Restart the PC.
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Megabit Modem 500L Installation Manual
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Chapter 4: Setting Up For Configuration
CONFIGURING A WEB BROWSER
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You access the Megabit Modem 500L Web pages through a Web browser (see page 6 for
Web browser versions supported). The Web browser must have the Proxies disabled. Change
the Proxie for your Web browser.
1
Open a Web browser. (Netscape Communicator is shown in the example below.)
2
Select Edit, Preferences, Proxie.
3
Select Direct connection to the Internet, then click OK.
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Accessing Megabit Modem 500L Web Pages
PRELIMINARY
ACCESSING MEGABIT MODEM 500L WEB PAGES
http://192.168.0.1./index.htm
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Location field
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Type http://192.168.0.1/index.htm in the Location field of the Web browser (as shown
below), then press ENTER . (192.168.0.1 is the default IP address for the Ethernet port and is a
private address specified for use by RFC 1918. If you change the Ethernet IP address through
the management port, you will enter the new IP address in the Location field.)
The Megabit Modem 500L Web page displays with two primary frames:
•
Frame A contains the navigation menus. Use the menus to select the configuration or
management page you want to view in Frame B.
•
Frame B displays the configuration or management page associated with the menu item you
selected from the navigation menu in Frame A.
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http://192.168.0.1
Frame A
20
Frame B
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Chapter 4: Setting Up For Configuration
SAVING THE CONFIGURATION
•
when defining PPP over ATM LAN settings (see page 39):
–
LAN IP address
–
LAN network mask
when DHCP enabled (see page 39):
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•
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As you make changes to the modem configuration, click the Submit button on the Web page to
accept changes and write the changes to RAM. Some configuration changes are not permanent,
however, until you write them to Non-Volatile RAM (NVRAM) and reset the modem. You
must reset the modem to effect these changes:
–
DHCP start IP address
–
primary DNS IP address
–
secondary DNS IP address
See the following sections to:
save configuration changes to NVRAM (page 22)
•
reset the modem to activate the configuration (page 25)
•
reset the modem to restore the factory default values (page 23)
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•
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Saving the Configuration
PRELIMINARY
Saving the Configuration to NVRAM
After clicking Submit to write configuration parameters to RAM, update your configuration by
writing the parameters to non-volatile RAM (NVRAM).
Click System on the Main Menu to access the System Menu.
2
Click Update Configuration on the System Menu.
3
Click Proceed to save to NVRAM.
4
Reset the modem to effect configuration using the procedure on page 25.
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1
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Chapter 4: Setting Up For Configuration
Resetting the Modem to Factory Defaults
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You can return Megabit Modem 500L parameters to the factory default values. This provides
a known starting point if you are troubleshooting the system or simply want to reconfigure
parameters. The factory default values are listed on page 24.
1
Click System on the Main Menu to access the System Menu.
2
Click Factory Default on the System Menu.
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When you click Proceed to return to factory default values, the modem
automatically resets.
3
Click Proceed to return to factory default values.
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Click Home
to return to the
Main Menu
Megabit Modem 500L Installation Manual
23
Saving the Configuration
Parameter
PRELIMINARY
Default Value
Parameter
Default Value
System Setup
PPP over ATM
TFTP parameters
SNMP parameters
Enable trap sending
Not enabled
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System Mode
0.0.0.0
Trap Server IP Address
0.0.0.0
TFTP Server Net Mask
255.255.255.0
Trap Server Net Mask
255.255.255.0
TFTP Server Path
blank field
Trap Community String
public
Set time and date
blank field
Get Community String
public
Admin IP Address
0.0.0.0
Set Community String
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TFTP Server IP Address
private
PPP Over ATM
PPP Over ATM WAN Configuration
PPP Over ATM LAN Configuration
Service Name
blank field
IP Address
192.168.0.1
ATM VPI
0
IP Net Mask
255.255.255.0
ATM VCI
0
DHCP
Enabled
Login Name
blank field
Start IP Address
192.168.0.2
Login Password
blank field
Primary DNS
0.0.0.0
Chap Host
blank field
Secondary DNS
0.0.0.0
Address Translation
Enabled
Gateway
192.168.0.1
Address Assignment
Dynamic
IP Address
0.0.0.0
User Assignments (for PPP WAN)
blank field
User’s IP Address
0.0.0.0
IP Addresses
0.0.0.0
Ports
0
Protocol
UDP
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Service Name
Static NAT Entries (private, proxy, and remote)
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Chapter 4: Setting Up For Configuration
Resetting the Modem
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Note that resetting the modem causes all active connections to drop.
After you make changes to the modem configuration and write the changes to NVRAM or
return modem configuration to factory defaults, you must reset the modem. See page 21 for
a list of changes that you must reset to effect.
Click System on the Main Menu to access the System Menu.
2
Click Reset Unit on the System Menu.
3
Click Proceed to reset the modem.
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Saving the Configuration
26
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5
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CONFIGURING SYSTEM SETTINGS
Before configuring sessions with a service provider, set up system parameters for the Megabit
Modem 500L. The following sections show the Web pages you use to configure the:
TFTP server IP address and network mask for performing functions such as
software upgrades on page 28, when required
•
SNMP parameters on page 29
•
system time and date on page 31
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•
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Unless specified otherwise, configuration parameters shown in this section are for
example only.
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Defining TFTP Parameters
PRELIMINARY
DEFINING TFTP PARAMETERS
1
Click System from the Main Menu.
2
Click TFTP Parameters on the System Menu.
3
Do the following:
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A TFTP server is a device on the LAN from which you can download software updates to your
modem. See page 59 for more information on a TFTP server. Also, see page 51 for procedures
on how to update the software on your modem.
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‹ Enter the TFTP server IP address for the device that will be the TFTP server.
ΠEnter the TFTP server net mask (subnet mask) for the TFTP server.
 Enter the Path on the TFTP server where the download files reside. You can enter a
path with a maximum of 20 characters.
Click Submit to accept the changes.
‹
Œ

PR
4
Click Home
to return to the
Main Menu
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Chapter 5: Configuring System Settings
DEFINING SNMP PARAMETERS
1
Click System from the Main Menu.
2
Click SNMP Parameters on the System Menu.
3
Do the following:
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The modem has an SNMP agent that allows it to be managed remotely by a Network
Management System (NMS). See page 58 for more information about managing the modem
through SNMP.
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‹ Select Enable Trap Sending if you want the modem to send traps to a server on
your LAN.
ΠEnter the Trap Server IP Address for the server to which the traps will be sent.
 Enter the Trap Server Net Mask (subnet mask) for the server to which the traps will
be sent.
‹
Œ

Ž
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

Click Home
to return to the
Main Menu
Megabit Modem 500L Installation Manual
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Defining SNMP Parameters
PRELIMINARY
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You can change the community string to a name you choose. The fields have
default names as shown in the screen on page 29 and are case sensitive. If you
change the name, however, the community string name must match on both
the manager and agent to allow access to the SNMP function.
Ž Public is the default Trap Community String which is an authentication string
for the trap receiver. You can change the name, using up to 19 characters.
 Public is the default Get Community String which is an authentication string
that enables an NMS to get status from the modem agent. You can change
the name, using up to 19 characters.
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 Private is the default Set Community String which is an authentication string
for an NMS to set or change parameters on the modem agent. You can
change the name, using up to 19 characters.
Click Submit to accept the changes.
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Chapter 5: Configuring System Settings
SETTING THE TIME AND DATE
1
Click System from the Main Menu.
2
Click Set Date & Time on the System Menu.
3
Do the following:
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Set the time and date for the modem.
‹ Enter the date in the format dd/mm/yy (for example, 03/10/1999 is June 10,
1999).
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ΠEnter the time in the 24-hour format hh:mm:ss (for example, 15:29:55 is 29
minutes and 6 seconds past 3 p.m.).
4
‹
Œ
PR
.
Click Submit to accept the changes.
Click Home
to return to the
Main Menu
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Setting the Time and Date
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6
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CONFIGURING SESSIONS
You configure sessions between the modem and a service provider using the PairGain
EasySession pages. The Megabit Modem 500L supports one PPP over ATM session at a time.
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There are many options from which to select when configuring sessions. See “Selecting a
Configuration Model” on page 34 to determine the easiest and most efficient way for you
to set up your session.
After you determine the configuration model, set up the connection between the modem and
the service provider (WAN) and the connection between your network users and the modem
(LAN). Go to page 35 to configure the WAN and to page 39 to configure the LAN.
PR
Then, activate sessions in the section “Activating and De-Activating Sessions” on page 43.
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Selecting a Configuration Model
PRELIMINARY
SELECTING A CONFIGURATION MODEL
There are many configuration options for the Megabit Modem 500L from which you can select.
Select the following options are recommended for enhanced performance:
DHCP not selected to allow the user to manually enter an IP address to the PC
•
NAT to map the public IP addresses (proxy IP addresses) acquired from the service
provider to the PC IP address
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The following matrix shows the recommended configuration:
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•
DHCP
NAT
How WAN IP Address
Acquired
On
On
Fixed
The following is a recommended procedure for configuring the Megabit Modem 500L:
1
Complete the WAN configuration (page 36). It is optional to map a LAN user to each PPP
over ATM session at this time. You can perform this at a later time (see Step 4) after the
modem dynamically serves IP addresses to LAN users or you have manually assigned IP
addresses to LAN users.
2
On the EasySession page:
a
b
When dynamically acquiring an IP address from the service provider, the session
receives the IP address at this time.
Set up the LAN side configuration (page 39).
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3
Select the session you want active then click Enable. The modem sets up the session
with the service provider. The Up radio button next to the session(s) will indicate that
the session was successfully set up.
4
34
Map the IP address for the PC to a session (page 38).
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Chapter 6: Configuring Sessions
CONFIGURING PPP OVER ATM SESSIONS
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Point-to-Point Protocol (PPP) runs over ATM virtual circuits (VCs). From the EasySession
pages, configure parameters for communicating between the modem and the service provider
over the WAN (page 36). Then, configure parameters for communicating between the LAN and
the modem (page 39). After setting up all appropriate WAN and LAN parameters for PPP over
ATM sessions, select the sessions that you want to activate (see page 43).
Click EasySession on the Main Menu to access the EasySession page.
2
Click Edit next to any Port 1-3 to display the PPP Over ATM WAN Configuration page for
that port.
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Configuring PPP over ATM Sessions
PRELIMINARY
Configuring the WAN
Configure the WAN parameters for PPP over ATM sessions between the Megabit Modem 500L
and the service provider.
Do the following to configure the WAN:
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1
Select a name for the service that is descriptive. The service name is an
identifier you use for the session and is not used for anything else. Each
service name must be unique. When you enter a service name, it displays as
the Port name for that session on the EasySession page.
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‹ Enter a descriptive name for the Service Name. The name you enter here also displays
in the Port field on the EasySession page (the fields are linked). Use a maximum of
19 characters for the service name, with no spaces allowed in the name.
ΠEnter the ATM VPI and ATM VCI values provided by the service provider. The
addresses are the virtual path identifier and virtual channel identifier for the session
connection (ATM) between the modem and the service provider. (See page 74 for
the VPI and VCI values you recorded from the service provider. Also, see “Mapping
an ATM Session” on page 56 for information on VPI and VCI values.)

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.
Enter your Login Name and Login Password supplied by the service provider. (See
“Login Name / Login Password Worksheet” on page 74.)
‹
Œ

Ž


‘
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Chapter 6: Configuring Sessions
Ž Enter the Chap Host name provided by the service provider. The name is used for
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CHAP authentication of this session. The name must be identical for the user
session and for the service provider. See page 73 for the CHAP name you recorded
from the service provider.
 Select the Enable checkbox when you want to use NAT protocol (Address Translation)
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to translate the session IP address to private IP addresses. It is recommended that
you always enable NAT.
You can choose, however, not to use NAT for address translation. If you do not use
NAT, you can assign only one LAN user (one PC) to the session. The IP address for
the LAN user PC must be the same IP Address Assignment given to the session by
the service provider (shown in field  on page 36). See page 18 to configure the
PC to accept the entry of a manual IP address (select Specify an IP address then
manually enter the session IP address).
 Select Dynamic as the Address Assignment if the service provider will automatically
assign an IP address for this session during set up. When the address is dynamically
assigned, the address field will display the assigned value after the session
comes up.
Select Fixed as the Address Assignment if the service provider gave you an IP address
for the session. If the address is fixed, type in the fixed IP addresses you recorded
on page 74 into the field “If fixed, enter assigned IP address.”
This IP address is also referred to as the proxy address for the session.
‘ Click User Assignment to open a dialog in which you can map LAN users to each
session. Go to the section “Defining User Assignment Parameters” on page 38 to
configure the user assignments.
2
Click Submit to accept the WAN PPP session configuration.
3
To configure other sessions:
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a
b
Click EasySession on the Main Menu. then click Edit by the Port 1-3 that you want to
configure. (Or, if you want to modify an existing session, click Previous or Next to
locate the session you want to modify).
Repeat Step 1 to configure the session.
Deleting a PPP over ATM WAN Session Configuration
1
From the PPP over ATM WAN Configuration page, click Previous or Next to access the session
configuration you want to delete.
2
Click Delete to remove a configuration that is displayed on the current Web page.
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Configuring PPP over ATM Sessions
PRELIMINARY
Defining User Assignment Parameters
Enter the IP address for the PC that is assigned to this session.
1
Do the following to define Users’ Assignments:
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You can map your PC to only one of the three sessions at a time. If you want
to use a different session, select User Assignment on the PPP over ATM WAN
Configuration page and move the user assignment to another session.
‹ Enter the Service Name you entered for the session shown in field ‹ on page 36.
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Œ Enter the User’s IP Address for the LAN-side user that you assign to this session.
(If the PC is mapped to one of the other two sessions, you must remove it from that
session to map it to this session.)
 Displays the Service Name and User’s IP Address for the configured session.
‹

Click Add to accept a user assignment you entered in Step 1.
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2
Œ
Delete a user assignment as follows:
38
1
Highlight the user assignment listed in  (see figure above) then click Delete. (When you
highlight the user assignment, it automatically displays in the Service Name and User’s IP
Address fields.)
2
After adding or deleting all user assignments, click Done to return to the EasySession page.
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Chapter 6: Configuring Sessions
Configuring the LAN
Click EasySession on the Main Menu to access the EasySession page.
2
At the top of the EasySession page, click Edit next to LAN Configuration to display the
PPP Over ATM LAN Configuration page.
3
Do the following to configure the LAN:
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1
‹ Enter the IP Address and IP Net Mask (subnet mask) for the modem Ethernet
10/100BASE-T LAN port. The IP address will not take effect, however, until the
modem is reset.
ΠSelect DHCP Enable if you want to enable the modem to act as a DHCP server to
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automatically assign IP addresses to devices on the LAN. If you enable DHCP,
ensure that all devices on the LAN have the TCP/IP stack set to Obtain an IP address
automatically (see page 18).
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Ž

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Configuring PPP over ATM Sessions
PRELIMINARY
 The modem automatically assigns the Start IP Address for the first device on the LAN
as one address higher than the Ethernet port on the modem, when DHCP is enabled.
You cannot edit this field.
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Ž Enter the IP address for a device that will be the Primary DNS. The primary Domain
Name System (DNS) device translates human-readable machine names into IP
addresses. (See page 59 for more information on DNS resolution.)
 Enter the IP address for a device that will be the Secondary DNS. The DNS device
translates human-readable machine names into IP addresses. (See page 59 for more
information on DNS resolution.)
 The modem automatically enters the Gateway IP address which is the same
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IP address as the LAN (Ethernet) 10/100BASE-T port of the modem. You cannot
edit this field.
‘ Click Static NAT Table to open a dialog in which you can map inbound Internet traffic
to specific sessions. Go to the section on “Defining Static NAT Entries” on page 41
to configure these parameters. Configuring Static NAT entries is optional.
Click Submit after completing the LAN configuration page.
5
After changing a LAN IP address and subnet mask (or changing the IP address and subnet
mask), effect the configuration by completing the procedures for “Saving the
Configuration” on page 21.
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Chapter 6: Configuring Sessions
Defining Static NAT Entries
Static NAT entries are required only for applications that use TCP/UDP connections initiated
from the remote end (WAN). Through the Static NAT Table, you can map inbound traffic from a
remote user to a user on your LAN. You can enter a maximum of 32 static NAT entries.
Do the following to map static NAT entries:
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1
‹ Enter the Private IP Address for a user on the LAN that is mapped to the
Proxy IP Address you will enter in field Πof the Static NAT Entry shown below.
Port is the logical port for the protocol (UDP or TCP) you select for this NAT entry.
Your system administrator will provide the protocol port number.
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ΠEnter the Proxy IP Address which is the IP address assigned to a particular session by
the service provider (see the  field on page 36 for where to find the proxy
IP address). Port is the logical port for the protocol (UDP or TCP) you select for this
NAT entry. Your system administrator will provide the protocol port number.
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
Ž

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Saving the Configuration
PRELIMINARY
 Enter the Remote IP Address for a user at a remote site that you are mapping to a user
on the LAN (LAN user was entered in field ‹ of the Static NAT Entry shown above).
Port is the logical port for the protocol (UDP or TCP) you select for this NAT entry.
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Your system administrator will provide the protocol port number.
If you do not have the information for the remote user and port, enter 0.0.0.0 for the
Remote IP Address and/or 0 for the Port Address.
Ž Select a Protocol (UDP or TCP) for the transport used between the LAN and the
remote user for this static NAT entry. (See “NAT” on page 57 for more information
about the transport protocols.)
 This field lists the IP Address, Port, and Protocol for the Private, Proxy and Remote
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fields defined. You can have up to 32 static entries.
2
Click Add to accept the Static NAT Entry.
3
Repeat Step 1 and Step 2 to add up to 32 static NAT entries.
4
To delete a Static NAT Entry, highlight the entry in field  then click Delete.
5
Click Done to return to the PPP over ATM LAN Configuration page.
SAVING THE CONFIGURATION
PR
Although you have submitted new settings, the parameters are not permanent until you write
them to NVRAM. See “Saving the Configuration” on page 21 to save the WAN and LAN
configurations to NVRAM.
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Chapter 6: Configuring Sessions
ACTIVATING AND DEACTIVATING SESSIONS
Activating Sessions
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After you configure sessions, you will activate sessions as you want to use them. Additionally,
you may want to deactivate some sessions while leaving other sessions active. The following
procedure shows you how to activate and deactivate sessions. Also, if you power down the
modem with sessions enabled, those same sessions will be enabled when you power up
the modem.
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The EasySession page provides status for each session. Up means the connection is active. Down
means the connection is not active. Set-Up means the modem is negotiating the link with the
service provider.
1
On the EasySession main page, select the checkbox next to each session that you want
to activate.
PR
Click to
select
sessions
2
Click Enable at the bottom of the EasySession page to activate the selected sessions.
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Activating and Deactivating Sessions
PRELIMINARY
Deactivating Sessions
On the Web browser, click the Reload icon (shown to the right) to refresh the screen.
On the EasySession main page, select the box next to each session that you want
to disable.
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1
Click to
select
sessions
Click Disable at the bottom of the EasySession page to disable the selected sessions.
PR
2
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Up, Down, and Set-Up are read-only fields that provide status for the session.
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VIEWING STATISTICS
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You can view status for the ADSL link (“Viewing ADSL Status” shown below) and for WAN
and LAN statistics (“Viewing Network Statistics” on page 48).
VIEWING ADSL STATUS
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The Megabit Modem 500L displays the status of the ADSL link. From the Main Menu, select
ADSL to display the ADSL Menu and ADSL Statistics page (see page 46). Reset on the ADSL Menu
will bring down the ADSL loop between the modem and the service provider.
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Viewing ADSL Status
PRELIMINARY
Description of the ADSL Statistics fields are on page 46.
Click Home to return
to Main Menu
‹
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Y
.
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Œ

Ž


‘
’
“
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”
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Chapter 7: Viewing Statistics
View the following ADSL link information:
‹ System time and date and total hours link is up.
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Clicking Reset on the ADSL Menu will bring down the ADSL loop between the
modem and the service provider.
ΠADSL link is synchronized between the modem and the service provider or the link
has no connection.
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 Any alarm conditions such as Loss of Sync (LOS), Loss of Frame (LOF), Loss of
Margin (LOM), or Loss of Cell Delineation (LCD).
Ž The SNR margin at which the modem is currently operating (dependent on parameters
selected by the service provider).
 Minimum SNR margin allowed before the MAR LED on the modem front panel
illuminates.
 Total number of seconds that the ADSL link had errors in a 24-hour span.
‘ Total amount of time that the lines were not available for transmission since power on
occurred or the modem statistics were last cleared (total unavailable seconds).
’ Line attenuation in decibels from -10 to +80 db.
“ The upstream and downstream data transmission rates.
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” Click Clear to reset all statistics.
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Viewing Network Statistics
PRELIMINARY
VIEWING NETWORK STATISTICS
LAN Statistics
R
Y
The Megabit Modem 500L displays the status for the LAN and WAN links. From the
Main Menu, select Statistics to display the Statistics Menu.
The Megabit Modem 500L displays status for the LAN. Click LAN Statistics from the
Statistics Menu.
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Click Home
to return to
Main Menu
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‹
48
Œ

Ž


‘
’
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Chapter 7: Viewing Statistics
View the following LAN information:
‹ System time and date and total hours link is up.
 Total number of IP packets processed.
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ΠIP and Ethernet addresses for the modem LAN port.
Ž Number of errored packets detected at this port and the number of packets forwarded.
 Number of packets reassembled at this port and the number of transmissions where a
route was not found in router table.
 Total number packets received and transmitted.
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‘ Total number of packets dropped and the number of collisions of devices on segment.
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’ Clicking Clear resets all statistics.
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Viewing Network Statistics
PRELIMINARY
WAN Statistics
Click Home
to return to
Main Menu
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Y
The Megabit Modem 500L displays status for the WAN. Click WAN Statistics from the Statistics
Menu. The values in the statistics fields are a total for all VCs configured.
Œ

View the following WAN information:
‹ System time and date and total hours link is up.
ΠStatistics for the ATM layer including how many Protocol Data Units (PDUs)
were transmitted and received on the session and how many PDUs were corrupted
(Bad PDUs).
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 Clicking Clear resets all statistics.
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Megabit Modem 500L Installation Manual
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MAINTENANCE
8
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MAINTENANCE AND
TROUBLESHOOTING
You can update software in the modem by specifying a device on the LAN where you will place
new software for the update (see “Defining TFTP Parameters” on page 28). Then, use the
procedure “Updating Software” on page 51 to download the new software from the TFTP
device to the Megabit Modem 500L.
Updating Software
You can download software upgrades to your system. Use the Web page shown on page 52 to
initiate the upgrade. To download software, you must have a host on your network that has been
configured as a TFTP server. You set the IP address for the TFTP server and a directory path to
the software when you configure system parameters in Chapter 5 on page 27.
To update the Megabit Modem 500L software, ensure these files are available to download from
a TFTP server. You can download any of these files separately:
.bin (binary) image files for software updates
•
.ini (initialization) files for modem configuration
•
.htm (html) files for Web page updates
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Maintenance
PRELIMINARY
Before initiating a software upgrade, ensure that all files are in the directory
you specified on the TFTP server when you configured system parameters.
Click System on the Main Menu to access the System Menu.
2
Click Upgrade Software on the System Menu then click Proceed. The modem software
upgrade for binary files (.bin) automatically begins.
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1
Click Home
to return to the
Main Menu
Click Download WEB pages on the System Menu then click Proceed. The modem software
upgrade for html files (.htm) automatically begins.
4
Click Download Configuration on the System Menu then click Proceed. The modem software
upgrade for initialization files (.ini) automatically begins.
PR
3
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Megabit Modem 500L Installation Manual
PRELIMINARY
Chapter 8: Maintenance and Troubleshooting
TROUBLESHOOTING
PC or hub not
communicating
with the modem
Try this:
• Check the LINK LED. If it is off, check the cabling to the 10/100BASE-T port and to the
hub or the NIC card in the PC to ensure it is secure.
R
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If this occurs:
• Check the position of the MDI/MDI-X switch. Set the switch to MDI when connecting to
a PC. Set the switch to MDI-X when connecting to a hub or router.
• Check that you are using a Web browser (Netscape or Internet Explorer) version 4.0
or newer.
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• Check that you have a TCP/IP protocol stack installed on your PC.
• If this is the initial installation, check that you set the IP address on your PC to obtain an
IP address automatically. See “Setting Up the PC to Request an IP Address” on page 18.
• Check the NIC card installation for correct IRQ, drivers, and adapter setup. See
appropriate documentation for the NIC card.
SYNC ADSL LED
If none of the above corrects your problem, contact your service provider.
Contact the service provider when the LED remains off indicating that the modem is not
detecting a transceiver at the far end. Flashing green indicates that the modem is attempting
to bring up the link. Solid green indicates that the loop is up.
The modem synchronizes at a minimum transmission rate of 64 kbps. The modem rate
adapts in increments of 32 kbps.
Contact the service provider when the LED is off indicating that the margin is below that
specified by the service provider.
LAN TX and RX
LEDs are not on
Check that the LINK LED is on. If it is on, you are simply not transmitting or receiving data
on the LAN 10/100BASE-T port. If, however, the LINK LED is not on, check the section “PC
or hub not communicating with the modem” in this table.
ADSL TX and RX
LEDs are not on
Check that the SYNC LED is on. If it is on, you are not transmitting or receiving data on the
WAN ADSL port. If, however, the SYNC LED is not on, contact your service provider.
PR
MARGIN ADSL
LED lights green
Megabit Modem 500L Installation Manual
53
PRELIMINARY
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Troubleshooting
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9
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TECHNICAL REFERENCE
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This chapter provides technical information about how your modem transmits data between
users on your LAN and a service provider over the WAN.
TRANSMISSION ON THE WIDE AREA NETWORK
The technology is ATM over DMT ADSL that provides the high-speed transmission between
the modem and the service provider. This transmission occurs over a single-pair telephone line.
The following sections describe these technologies.
ADSL
Asymmetric Digital Subscriber Line (ADSL) is the technology used to transmit data between
the modem and service provider at the physical layer. It provides data at asymmetric rates so
that downstream traffic from a service provider to you is faster than upstream traffic from you
to the service provider. The downstream transmission rate is up to 7.552 Mbps, while the
upstream rate is up to 928 kbps. Analog POTS can coexist with ADSL on the same line.
PR
Discrete Multitone (DMT) is the line coding used for ADSL. Basically, it divides the
bandwidth into subchannels. Some of the subchannels are reserved for analog POTS. The
other subchannels are allocated to upstream and downstream traffic. Within the upstream
and downstream subchannels, some subchannels are used for management and
performance functions.
DMT ADSL provides rate-adaptive transmission that allows the service provider to deliver you
the best transmission rate determined by distance and line conditions.
Megabit Modem 500L Installation Manual
55
PPP
PRELIMINARY
ATM
R
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Asynchronous Transfer Mode (ATM) is a technology that can simultaneously transmit voice,
data, and video over ADSL. ATM uses fixed-size cells that transmit over a preestablished
connection called a Permanent Virtual Circuit (PVC). Quality of Services can also be specified.
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ATM cells are 53 bytes that comprise a 5-byte header and 48-byte payload. The header includes
the Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI) that you entered when you
configured each session in Chapter 4. The VPI and VCI provide the virtual connection between
the modem and the service provider. The VPI identifies the Virtual Path (VP) that transports
ATM cells in a Virtual Channel (VC). The Megabit Modem 500L has three VCs in the VP,
which provide the three sessions for the Internet or for other WAN applications. You can,
however, activate only one session at a time.
Mapping an ATM Session
Your service provider will give you a VCI and VPI address for each session. The VCI address,
for each session (each session is a VC), can be a number up to a maximum of 255 (32 to 255),
with the first 32 numbers (0 through 31) reserved. The VCI value for each VC must be unique
for each of the three sessions. The VPI value must always be 0.
PPP
PPP runs over ATM virtual circuits. PPP exists between the hardware layer and the
network-layer interface protocols. It is a widely used protocol for establishing connections on
the Internet. PPP provides the set up and release of connections for each session. PAP/CHAP
provide the authentication for the PPP sessions.
PR
You can configure three sessions , but only one session can be established between the service
provider and the modem at a time. The user is mapped to the session that is active.
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Megabit Modem 500L Installation Manual
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Chapter 9: Technical Reference
PAP/CHAP Authentication Security
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Password Authentication Protocol (PAP) and Challenge-Handshake Authentication Protocol
(CHAP) are two ways to authenticate PPP sessions. PAP and CHAP are both offered since some
systems support only PAP. With PAP, the modem sends authentication requests to the service
provider and authentication occurs only once during the life of the link.
In CHAP, the service provider returns an authentication challenge to the modem during
authentication. CHAP can be renegotiated during the life of the link. Also, both the modem and
the service provider must support clear text versions of the password. The CHAP host field must
be the same on both ends of the session.
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NAT
RFC 1631 Network Address Translation (NAT) provides the means to map private IP addresses
to the public IP addresses (proxy addresses) that are set up for the PPP sessions. Essentially, you
hide your private addresses behind the public IP address assigned to a session.
You can map one LAN user IP address to one of the three sessions you set up. If you want to
activate a different session, move the LAN user to the new session.
Static NAT entries are required only for applications that involve TCP/UDP connections
initiated from the remote end (WAN). An example is the RealPlayer™ application. The
RealPlayer (client) initiates a TCP connection to the RealServer™, which then initiates a
UDP connection back to RealPlayer. RealPlayer can then tell the server to use a specific
UDP port for the UDP connection. The user should set up a static NAT entry for the UDP
connection for RealPlayer to work properly through NAT.
PR
UDP is connectionless where TCP is connection-oriented protocol. Both UDP and TCP use
protocol port numbers to distinguish services and sessions.
Megabit Modem 500L Installation Manual
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Management Protocols
PRELIMINARY
MANAGEMENT PROTOCOLS
R
Y
SNMP is used to configure system parameters, to monitor statistics, and to perform advanced
management tasks.
SNMP
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This management protocol specifies how to send information between a network management
system (NMS) and managed devices on a network. Managed devices run a program called an
agent. The agent interprets SNMP requests and responds to them. The NMS communicates with
the agents in the managed devices to:
•
set configuration
•
get configuration
•
get status
A Management Information Base (MIB) defines the configuration and status parameters. The
Internet Engineering Task Force (IETF) specifies standard MIBs for certain types of devices,
ensuring any NMS can manage them. Additionally, vendors can issue proprietary MIBs for their
devices to fit specific needs.
Megabit Modem 500L SNMP Agent
The Megabit Modem 500L provides an SNMP agent that supports several MIBs for
management of the system. The SNMP agent can process datagrams received from the Ethernet
interface. The agent and the protocol stack complies with the following Request for Comments
(RFCs):
RFC 1155 Structure of Management Information (SMI)
•
RFC 1157 Simple Network Management Protocol (SNMP)
PR
•
58
•
RFC 826 Address Resolution Protocol (ARP)
•
RFC 792 Internet Control Message Protocol (ICMP)
•
RFC 791 Internet Protocol (IP)
•
RFC 768 User Datagram Protocol (UDP)
Megabit Modem 500L Installation Manual
PRELIMINARY
Chapter 9: Technical Reference
MIB and Trap Support
Megabit Modem 500L supports the following MIBs:
R
Y
Each managed device has configuration, status, and statistical information that defines its
functionality and operational capabilities. These elements make up the MIB for the device being
managed. The MIB defines the kind of information an NMS can retrieve from a managed
device, and the settings an NMS can control in a managed device.
RFC 1213: "Management Information Base for Network Management of TCP/IP-Based
Internet: MIB-II" Supported groups: system, interfaces, IP, ICMP, UDP, and SNMP
groups.
•
RFC 1215: "A Convention for Defining Traps for Use with the SNMP" Supported groups:
ColdStart, linkUp, linkDown, and authenticationFailure traps. Link status traps are sent for
events related to Ethernet.
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•
•
ADSL MIB
•
ATM MIB
•
PairGain Agent MIB
•
PairGain Tiger MIB
DNS RESOLUTION
PR
If you want Domain Name System (DNS) resolution, you need to specify the IP address for a
device to be the DNS resolver. You can also specify another IP address to designate a second
device for a secondary DNS resolver. The DNS device maps human-readable addresses to IP
addresses. A human-readable address is one such as maggie.copro.company.com that
contains a host name and domain. The DNS resolver maps that name to the IP address that is a
numeric (four octet) value such as 192.168.30.25 (see page 39 for the example on how to
configure a DNS address).
TFTP SERVER
Trivial File Transfer Protocol (TFTP) is a standard for file transfer. It provides the service with
minimal capability and minimal overhead. TFTP uses UDP for connectionless delivery.
Megabit Modem 500L Installation Manual
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PRELIMINARY
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TFTP Server
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WAN INTERFACE SPECIFICATIONS
A
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SPECIFICATIONS AND DATA
ADSL (Asymmetric Digital Subscriber Line)
Maximum transmission rate:
Downstream
Upstream
1.5 Mbps
512 kbps
Minimum transmission rate to sync
64 kbps
Rate-adaptive data rate resolution
32 kbps increments
Signal Format
DMT (Discrete Multitone) line code
Connector
RJ-11
ATM (Asynchronous Transfer Mode)
AAL5 (ITU I.363.5) - Supports encapsulation and
de-encapsulation of AAL5 Protocol Data Units (PDUs) for
convergence. Segmentation and Reassembly (SAR) layer
segments and reassembles AAL5 PDUs into ATM cells that are
48-byte SAR-PDUs.
ATM Layer
Attaches or strips the 5-byte header to the 48-byte SAR-PDU.
Performance is a maximum line rate of 17,812 cells per second
downstream and 2,189 cells per second upstream.
PR
ATM Adaptation Layer
Cell Format
Format complies with ITU I.361 ATM cell format. Cell delineation
complies with ITU I.432 Cell Delineation and HEC. Cells are fixed
length (53 bytes), including 5 bytes of header and 48 bytes of
payload. Included in the header are the VPI and VCI number.
Virtual Circuit type
Permanent Virtual Circuit (PVC) per ATM forum UNI version 3.1.
Maximum Virtual Circuits
Three virtual circuits, with one that is actively connected to a
service provider; encapsulated as PPP.
Megabit Modem 500L Installation Manual
61
PPP over ATM
PRELIMINARY
PPP OVER ATM
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You can configure each of the three sessions with the following parameters:
Provides a phase of the PPP negotiation by setting up the physical link (RFC
1661).
Network Control
Protocol (NCP)
Occurs after LCP, negotiating parameters for each network interface and uses
Internet Protocol Control Protocol (IPCP) which is defined in RFC 1332.
Authentication
(PAP/CHAP)
Provides authentication of PPP sessions for security through Password and
Challenge-Handshake Authentication Protocols (RFC 1994).
Network Address
Translation
Network Address Port Translation (NAPT) maps a LAN side private IP address to
the public IP address assigned to one of the three virtual channels (RFC 1631).
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Link Control Protocol
(LCP)
LAN INTERFACE
Connector
RJ-45 Ethernet with auto-detecting10/100BASE-T (IEEE 802.3I for 10BASE-T and
IEEE 802.3u for 100BASE-T)
PHYSICAL SPECIFICATIONS
Height
Width
Depth
6.9 inches (17.5 cm)
9.2 inches (23.4 cm)
2.2 pounds (1.0 kg)
PR
Weight
1.2 inches (3.1 cm)
POWER SUPPLY
62
Voltage
100 to 240 Vac
Frequency
50 to 60 Hz
Current
0.3 Amps
Megabit Modem 500L Installation Manual
PRELIMINARY
Appendix A: Specifications and Data
ENVIRONMENTAL
32 to 122 °F (0 to 50°C)
Relative Humidity
up to 95% non-condensing
Altitude
between -200 and 13,000 feet (-61 to 3.962 meters)
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Operational Temperature
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COMPLIANCE
Emissions and Immunity
Compliance
• CENELEC/ETSI (IEC 555 and 801)
• CE (EN 55022 and EN 50082-1)
• UL and cUL (UL-1950)
• CE (EN 60950)
PR
Operations and Safety
Compliances
• FCC Part 15, Subpart B, Class B
Megabit Modem 500L Installation Manual
63
RFCs
PRELIMINARY
RFC 2364 PPP Encapsulation over ATM
RFC 1661 for PPP LCP
RFC 1994 for PAP/CHAP Authentication
RFC 1631 IP Network Address Translator (for NAPT)
RFC 1350 for TFTP client
MIBS
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•
•
•
•
•
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RFCS
PR
• TR-006 ADSL Forum ADSL Line MIB
• T1.413 section 8.2
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Megabit Modem 500L Installation Manual
PRELIMINARY
Appendix A: Specifications and Data
RATE VS. REACH
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Payload Rate vs Reach on 24 AWG (0.4 mm) with 4dB Margin in Low Noise Environment
10.000
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Rate in Mbps
1.000
0.100
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
0.010
Reach in Kilofeet
Downstream
Upstream
Payload Rate vs Reach on 26 AWG (0.5 mm) with 4dB Margin in Low Noise Environment
10.000
Rate in Mbps
0.100
0.010
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
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1.000
Reach in Kilofeet
Megabit Modem 500L Installation Manual
Downstream
Upstream
65
Hardware
PRELIMINARY
HARDWARE
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The following provides additional information about Megabit Modem 500L such as the
installation kit and modem connectors pinouts.
Installation Kit
Part
Rubber feet
Grey cable
Black cable
Power cable
Description
Function
Four black rubber feet
Attaches to the base of the modem.
Silver-satin phone cord with 4-pin modular
plugs (straight-through)
Connects the modem ADSL connector to the
wall phone jack for access to the Internet.
CAT 5, cable with 8-pin modular plugs
(straight-through)
Connects the modem 10/100BASE-T connector
to the LAN through a hub or to a PC NIC.
Power supply with optional power cord (this
item is ordered dependent on the type of
power supply and cord required for your
location)
Connects the modem POWER connector to the
local power source.
Two 6x1/2-inch sheet metal screws
Installs into a wall for wall-mounting modems.
PR
Screws
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The following items are included in the installation kit and are used to install the Megabit
Modem 500L as shown in Chapter 3 on page 11.
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PRELIMINARY
Appendix A: Specifications and Data
Connector Pinouts
You can make your own cables for the ADSL RJ-11 connector and the 10/100BASE-T Ethernet
connector on the rear of the modem. The following sections provide the pinout information.
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ADSL Port
The following table shows the signal on each pin for the ADSL port. The connector for this
interface is an RJ-11. See page 14 for the location of this port.
Signal
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1
Not used
2
No connection
3
Ring
4
Tip
5
No connection
6
Not used
10/100BASE-T Port
PR
The following table shows the signal on each pin when the switch is in either the MDI or
the MDI-X position for the 10/100BASE-T port. The connector for this interface is an RJ-45.
See page 14 for the location of this port.
MDI
MDI-X
Signal
Description
1
3
TX+
Transmit Data (+)
2
6
TX-
Transmit Data (-)
3
1
RD+
Receive Data (+)
4
4
Not used
Not used
5
5
Not used
Not used
6
2
RD-
Receive Data (-)
7
7
Not used
Not used
8
8
Not used
Not used
Megabit Modem 500L Installation Manual
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PRELIMINARY
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Hardware
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Megabit Modem 500L Installation Manual
B
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TECHNICAL ASSISTANCE
AND WARRANTY
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This chapter describes how to contact PairGain for technical support and warranty service.
TECHNICAL SUPPORT
PairGain Technical Assistance is available 24 hours a day, 7 days a week by contacting
PairGain’s Customer Service Engineering group at one of the following numbers:
•
Telephone: (800) 638-0031
(714) 832-9922
•
Fax:
(714) 832-9924
•
Email:
support@pairgain.com
A Customer Service Engineer answers technical assistance calls Monday through Friday
between 7:30 AM and 5:30 PM, Pacific Time, excluding holidays. At all other times, an on-duty
Customer Service Engineer returns technical assistance calls within 30 minutes.
WORLD-WIDE WEB
PR
PairGain product, company, and application information can be found at
http://www.pairgain.com using any Web browser.
Megabit Modem 500L Installation Manual
69
Limited Warranty
PRELIMINARY
LIMITED WARRANTY
R
Y
PairGain Technologies, Inc. ("PairGain") warrants that, for a period of 12 months from the date
of shipment, the hardware portion of its products will be free of material defects and faulty
workmanship, under normal use. PairGain's obligation, under this warranty, is limited to
replacing or repairing, at PairGain's option, any such hardware product which is returned during
the 12-month warranty period per PairGain's instructions and which product is confirmed by
PairGain not to comply with the foregoing warranty.
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PairGain warrants that, for a period of 90 days from the date of purchase, the software furnished
with its products will operate substantially in accordance with the PairGain published
specifications and documentation for such software. PairGain’s entire liability for software that
does not comply with the foregoing warranty and is reported to PairGain during the 90-day
warranty period is, at PairGain’s option, either (a) return of the price paid or (b) repair or replace
of the software. PairGain also warrants that, for a period of 30 days from the date of purchase,
the media on which software is stored will be free from material defects under normal use.
PairGain will replace defective media at no charge if it is returned to PairGain during the 30-day
warranty period along with proof of the date of shipment.
The transportation charges for shipment of returned products to PairGain will be prepaid by the
Buyer. PairGain will pay transportation charges for shipment of replacement products to Buyer,
unless no trouble is found (NTF), in which case the Buyer will pay transportation charges.
PairGain may use reconditioned parts for such repair or replacement. This warranty does not
apply to any product which has been repaired, worked upon, or altered by persons not
authorized by PairGain or in PairGain's sole judgment has subjected to misuse, accident, fire or
other casualty, or operation beyond its design range.
The warranty for repaired products shall remain in effect until the end of the original warranty
period.
PR
PAIRGAIN DISCLAIMS ALL OTHER WARRANTIES, EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT
TO ITS PRODUCTS AND ANY ACCOMPANYING WRITTEN MATERIALS. FURTHER,
PAIRGAIN DOES NOT WARRANT THAT SOFTWARE WILL BE FREE FROM BUGS OR
THAT ITS USE WILL BE UNINTERRUPTED OR REGARDING THE USE, OR THE
RESULTS OF THE USE, OF THE SOFTWARE IN TERMS OF CORRECTNESS,
ACCURACY, RELIABILITY OR OTHERWISE.
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PRELIMINARY
Appendix B: Technical Assistance and Warranty
ADVANCE REPLACEMENT
R
Y
Any product determined by PairGain not to comply with the applicable warranty within 30
calendar days from the date of shipment to the Buyer, or as otherwise authorized, are eligible
for advance replacement free of charge. A replacement product will be shipped to the Buyer
within 24 hours of PairGain's receipt of notification from the Buyer.
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If products returned to PairGain for advance replacement are not received by PairGain within
30 calendar days of shipment of the replacement product or if no trouble is found (NTF) as
determined by PairGain, the Buyer will be responsible for payment of the cost of the
replacement product.
BILLING
PairGain’s repair of products returned for repair, replacement, or credit, whether in warranty or
out of warranty, which is found to be damaged due to customer negligence or which has had
parts removed will be billed on a time and material basis.
In the event that the returned equipment is not covered by warranty, PairGain will contact the
customer with estimated repair or replacement charges and obtain customer disposition of the
product if a purchase order has not been provided.
PR
Equipment returned for repair or replacement is subject to a $70 per unit no trouble found (NTF)
charge in the event that diagnostic evaluation reveals no evidence of functional failure or
physical defects.
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Returning a Product
PRELIMINARY
RETURNING A PRODUCT
To return equipment to PairGain:
Locate the number of the purchase order under which the equipment was purchased. You
will need to provide this number to PairGain Customer Service to obtain a return
authorization.
2
Call or write PairGain Customer Service to ask for a Return Material Authorization (RMA)
number and any additional instructions. Use the telephone or fax number listed below:
Telephone:
(714) 730-2800
•
Fax:
(714) 730-2961
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•
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1
Include the following information, in writing, along with the equipment you're returning:
•
•
•
•
•
Your company name, address, and the name of a person PairGain can contact
regarding this equipment.
The same purchase order number you gave to Customer Service when you requested
an RMA number.
A description of the equipment, as well as the number of units you're returning to us.
Be sure to include the model and part number of each unit.
The shipping address to which PairGain should return the repaired equipment.
The reason for your return:
a
The equipment is defective.
If the equipment is defective, please tell us what you observed just before the
equipment malfunctioned. Be as detailed in your description as possible.
If there's another reason for returning the equipment, please let us know so we can
determine how best to help you.
PR
b
4
Pack the equipment in a shipping carton.
5
Write PairGain’s address and the Return Material Authorization Number you received
from Customer Service clearly on the outside of the carton:
PairGain Technologies, Inc.
14352 Franklin Ave.
Tustin, CA 92780-7013
Attention: CRF RMA (Number)
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CONFIGURATION WORKSHEETS
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This chapter provides worksheets where you can record your system settings and system
sessions configuration information prior to executing the procedures in Chapter 4 through
Chapter 7.
The information that you need to configure the modem is listed below. Contact your service
provider for this information. Use the worksheets in this appendix to record your configuration
information. When you begin configuration of the modem in Chapter 4, the procedures refer
you to the proper table so you can use the information you have recorded.
CONFIGURATION INFORMATION
1
If using CHAP, the CHAP authentication name for each session.
2
Session address for Ports 1 through 3 (WAN configuration):
•
ATM VPI and ATM VCI (specified for each session)
•
when using fixed IP addresses, IP address specified for each session by the
service provider
•
Login Name and Login Password (specified for each session)
PR
CHAP Host Name Worksheet
From Service Provider
If using CHAP for
authentication, enter CHAP
host name for each session
Configuration Information
1
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3
73
Configuration Information
PRELIMINARY
WAN Configuration Worksheet
From Service Provider
Configuration Information
VCI
1 __________________________
1 __________________________
2 __________________________
2 __________________________
3 __________________________
3 __________________________
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VPI
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ATM Configuration
(VPI/VCI for each session)
Login Name / Login Password Worksheet
From Service Provider
Login Name and Login
Password
(for each session)
Login Information
Login Name
Login Password
1 ____________________________
1 ____________________________
2 ____________________________
2 ____________________________
3 ____________________________
3 ____________________________
Fixed IP Addresses Worksheet
PR
From Service Provider
Fixed IP Addresses
(for each session)
Not applicable if service provider
dynamically assigns IP addresses.
74
Fixed IP Addresses
.
.
. ___________
.
.
. ___________
.
.
. ___________
1___________ ___________ ___________
2___________ ___________ ___________
3___________ ___________ ___________
Megabit Modem 500L Installation Manual
The Institute of Electrical and Electronic Engineers (IEEE) 802.3 specification for
Ethernet over thin coaxial cable.
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10/100BASE-T
D
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GLOSSARY
ATM Adaptation Layer 5, TBS
ADSL
Asymmetric Digital Subscriber Line is a technology in which data is transferred from
the service provider to the subscriber at up to 7.552 Mbps, and transferred from
subscriber to service provider at up to 928 Kbps. ADSL is the implementation of the
physical layer for transmission of data.
ATM
Asynchronous Transfer Mode is a high bandwidth, low delay, connection-oriented,
packet-like switching and multiplexing technique that uses 53-byte fixed-size cells to
transmit voice, video and data over a network. ATM layers define how cells are
formatted and provides the transport of the fixed length cells between the modem
and the service provider (or endpoints of the virtual connection).
attenuation
The dissipation of the power of a transmitted signal as it travels over copper wire,
measured in decibels (dB).
authentication
Security feature offered through PAP and CHAP with PPP sessions.
BER
Bit Error Rate is a measure of transmission quality. The ratio of error bits to the total
number of bits transmitted.
bps
bit-per-second is the number of bits transferred during each second of data
transmission.
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CBR
Constant Bit Rate is a Service Class for the modem. It provides constant bit rate data
with a timing relationship between the source and the destination. Also, a traffic class
that carries a guaranteed constant bandwidth. Best suited for applications that require
fixed bandwidth, such as uncompressed voice, video and circuit emulation. CBR is a
Quality of Service class defined by the ATM Forum for ATM networks.
cell
A fixed-length packet. Also, the unit of data transmission used in ATM. Each ATM cell
contains a fixed-size frame (53 bytes) consisting of a five-byte header and a 48-byte
payload.
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See PAP/CHAP.
community
string
A text string required for an SNMP trap to be received by a trap receiver(s). Also, a
text string that identifies an SNMP community and is associated with specific access
rights (read-only or read/write).
CRC
Cyclic Redundancy Check is a method used to verify the accuracy of data
transmission.
DMT
Discrete Multi-Tone is a modulation coding for an ADSL line. DMT is the modulation
technology used for the Megabit Modem 500L ADSL.
downstream
traffic
Communications from a service provider to a user.
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encapsulation
The inclusion of data in a protocol header prior to transmission, which enables
successful data transmission between different protocol networks.
ES
Errored Seconds is the seconds during which errors occur that prevent the payload
from being corrected.
Ethernet
A protocol used for LAN traffic, which has a transfer rate of 10 or 100 Mbps.
flash memory
Non-volatile memory that can be erased and reprogrammed.
gateway
A device (generally a router) that provides translation services to allow
communication between two dissimilar networks.
IP
Internet Protocol is a TCP/IP protocol that controls packet transmission.
IP address
A 32-bit address used in IP routing. The address consists of four octets separated by
decimals. The octets comprise a network section, a subnet section (optional) and a
host section.
LAN
Local Area Network is a physically connected group of devices between which data
transmission occurs at high speeds over relatively short distances.
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CHAP
Logical Link Control is an encapsulation protocol for data that you transmit from the
modem over the WAN in 1483 Bridging/Routing mode.
LOF
Loss Of Frame is an error indicating that the receiving equipment has lost a frame.
LOS
Loss Of Signal is an error indicating that the receiving equipment has lost the signal.
MAC
Media Access Control is a physical address associated with a device such as a NIC.
For modem configuration, the MAC is used to map inbound traffic (from a remote IP
address) to an internal (LAN) IP address. Used with 1483 Bridging/Routing Mode.
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Appendix D: Glossary
The noise margin in decibels that the modem must achieve with a BER of 10 -7 or
better to successfully complete initialization.
MIB
Management Information Base is a set of variables that define the configuration and
status parameters for network management. Network management stations can
retrieve information from and write information to an MIB. The Internet Engineering
Task Force (IETF) specifies standard MIBS for certain types of devices, ensuring any
NMS can manage the devices. Vendors can specify proprietary MIBs for their devices
to fit specific needs.
NAT
Network Address Translation provides the means to map private IP addresses to the
public IP addresses (proxy addresses) that are set up for the PPP sessions. Used with
PPP Mode. NAPT is Network Address and Port Translation.
NVRAM
Non-Volatile Random Access Memory is a medium for storing system configuration
information, so the information is not lost when the system is reset.
octet
A TCP/IP term indicating eight bits.
PAP/CHAP
Password Authentication Protocol and Challenge Handshake Authentication Protocol
are two ways to authenticate PPP sessions. With PAP, the modem sends
authentication requests to the service provider and authentication occurs only once
during the life of the link.
In CHAP, the service provider returns an authentication challenge to the modem
during authentication. CHAP can be renegotiated during the life of the link. Also, both
the modem and the service provider must support clear text versions of the
password. The CHAP host field must be the same on both ends of the session.
PDU
Protocol Data Unit is data as it appears at the interface between a particular sublayer
and the sublayer immediately below.
POTS
Plain Old Telephone Service.
PPP
Point-to-Point Protocol exists between the hardware layer and the network-layer
interface protocols. It is a widely used protocol for establishing connections on the
Internet. PPP provides the set up and release of connections for each session.
PAP/CHAP provide the authentication for the PPP sessions.
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proxy IP address
The proxy IP address is the WAN IP address for one of the 32 sessions. The proxy
IP address is used to enter static NAT entries. See IP address.
PVC
Permanent Virtual Circuit is a logical connection comprised of a predefined static
route across a packet-switched network that is always in place and always available.
QoS
Quality of Service is the configured traffic parameters that are assigned to a virtual
circuit, which specifies how quickly and how accurately data is transferred from the
sender to the receiver.
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Request For Comment is a series of notes that contain surveys, measurements, ideas,
techniques, and observations, as well as proposed and accepted TCP/IP protocol
standards. RFCs are available on the Internet.
RIP
Routing Information Protocol allows routers to update the routing tables
automatically (for example with information such as how many hops between
destinations). The version of RIP you select for the session must match the version
supported by the service provider. Versions RIP1 and RIP-1 compatible are used for
broadcast. Version RIP 2 is used for multicast.
SEF
Severely Errored Frames is the incoming signal has at least four consecutive errored
framing patterns.
SES
Severely Errored Seconds is the seconds during which more than 2,500 bipolar errors
are detected on the line.
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RFC
session
The time during which two computers maintain a communication connection. An
example is a connection configured between the Megabit Modem 500L and the
service provider.
SNMP
Simple Network Management Protocol is a protocol that specifies how to send
information between a NMS and managed devices on a network. The managed
devices run a program called an agent. The agent interprets SNMP request and
responds to them. SNMP is used to set device configurations, read device
configurations or read the device status.
Spanning Tree
A bridging protocol that detects and prevents loops from occurring in a system
containing multiple bridges.
subnet mask
A type of IP address that allows a site to use a single IP address for multiple physical
networks.
TCP
Transmission Control Protocol is a transport protocol used to map inbound traffic
(from a remote IP address) to an internal (LAN) IP address. Establishes connection
with remote user before data transmission.
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Transmission Control Protocol/Internet Protocol is a protocol used for
communications between computers over networks and the internet.
TFTP
Trivial File Transfer Protocol is a protocol used to download card images or other files
from an external TFTP server to the NVRAM of any installed cards, or to upload files
from an installed card to an external TFTP server.
trap receivers
PCs configured to receive SNMP traps (messages).
traps
Autonomous, interrupt-driven, SNMP messages sent from a managed node to a
network management station to indicate that an event has occurred.
UAS
UnAvailable Seconds is the number of seconds during which the line is unavailable.
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Appendix D: Glossary
Unspecified Bit Rate is an ATM traffic type used for LAN traffic. When network
congestion occurs, the data is stored in a buffer until it can be sent.
UDP
User Datagram Protocol is a transport protocol used to map inbound traffic (from a
remote IP address) to an internal (LAN) IP address. Uses a protocol port number for
the destination at the remote location.
upstream traffic
Communications from a user to a service provider.
VCI
Virtual Channel Identifier is a 16-bit field addressing identifier in the header of an ATM
cell used to route cell traffic. It identifies a particular VC link for a given VP.
VCMUX
Virtual Channel Multiplexer-based encapsulation used for networks with large
numbers of virtual channels making it practical to carry a single protocol per virtual
channel.
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UBR
Virtual Circuits are logical connections in the ATM network over which ATM cells are
transmitted.
VPI
Virtual Path Identifier is an 8-bit field addressing identifier in the header of an ATM
cell that is used to route cell traffic. It identifies a particular VP link.
VPs
Virtual Paths are groups of VCs carried between two points. The VP provides a means
of bundling traffic traveling in the same direction. VPs are defined by a unique VPI
value.
WAN
Wide Area Network is a network consisting of nodes located across a large
geographical area. Also, the connection between a service provider and Megabit 700F
Modem.
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Numerics
E
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INDEX
asymmetric digital subscriber line
See ADSL
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10/100BASE-T
connector pinouts 67
asynchronous transfer mode
See ATM
description 75
ATM
700F web pages
accessing 20
adaptation layer 61
configuring 19
cell format 61
A
description 56, 75
accessing 700F web pages 20
max VCs 61
activating sessions
specifications 61
active sessions at power up 43
attaching modem feet 12
PPP over ATM 43
authentication security 57
adaptation layer 61
addresses
B
back panel 13, 14
VCI 56
VPI 56
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ADSL
connector pinouts 67
description 55, 75
DMT 55
loop Reset 45
service 15
C
cables
connecting 14
installation 14
requirements 11
cell formats 61
compliance 63
specifications 61
viewing status 45, 47
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defining
configuration
dynamic IP addresses 37
modem 17
fixed IP addresses 37
saving 21, 42
SNMP parameters 29
service provider 9
static NAT table parameters 40
web browser 1, 17
TFTP parameters 28
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introduction 1
configuration worksheets 73
time and date 31
configuring
user assignment parameters 38
user assignments 37, 38
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700 web pages 19
LAN 39
PC 18
deleting
PPPoATM WAN session 37
PPP over ATM sessions 35
sessions 33
10BASE-T 75
system settings 27
ADSL 55, 75
WAN 36
ATM 56, 75
web browser 19
DMT 55, 76
connecting
downstream 76
cables 14
MAC 76
modem feet 12
modem 1
phone service 16
NAPT 57
connector pinouts 67
NAT 77
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de-activating sessions
PPP over ATM 44
82
descriptions
PAP/CHAP 57
power cable 9
subnet mask 78
TFTP 78
upstream 79
DMT ADSL 55
DMT description 55, 76
DNS resolution 59
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EIndex
installing the modem 11
downstream
description 76
attaching feet 12
transmission rate 1, 55
cabling 14
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flat-surface mounting 7
dynamic host configuration protocol
setting MDI/MDI-X switch 13
See DHCP
wall mounting 8
E
encapsulation methods, PPP 2, 56
F
configuring
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factory defaults values 23
L
LAN
PPP over ATM 39
features
interface specifications 62
applications 3
downstream transmission rate 2
viewing statistics 48
LED indications 15
modem 2
limited warranty 70
overview 2
login configuration worksheet 74
protocols 2
M
technology 2
transmission speeds 2
MAC, description 76
upstream transmission rate 2
main menu
ADSL 45
flat-surface mounting 7
I
installation
cable types 11
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introduction 1
kit 66
phone service 9
easysession 35, 37
information 20
statistics 48
MDI/MDI-X switch 13
MIB and trap support 59
MIBs 64
requirements 5
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N
modem
adaption rate 53
NAT
description 40, 57, 77
attaching feet 12
table parameters 40
configuration process 17
description 1
features 2
network address port translation
See NAPT
network statistics 48
flat-surface mounting 7
obtaining IP Address automatically 18
overview 1
resetting 25
resetting to factory defaults
default values 23
setting MDI/MDI-X switch 13
storage 5
technology 1
transmission speeds 1
unpacking 5
user assignments 38
wall mounting 8
modem feet
connecting 12
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mounting
clearances 7, 8
flat-surface 7
wall 8
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panel, back 13, 14
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applications 3
PAP/CHAP
authentication security 57
description 57
parameters
NAT table 40
SNMP 29
TFTP 28
user assignment 38
PC, configuring 18
phone service
connecting 16
installing 9
requirements 9
pinouts 67
point-to-point protocol
See PPP and PPP over ATM
power cable 9
PPP 2, 56
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EIndex
S
PPP over ATM
activating sessions 43
saving a configuration 21, 42
configuring
service
ADSL 15
WAN 36
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LAN 39
service provider
de-activating sessions 44
configuration 9
sessions 56, 57
requirements 9
configuring 35
sessions
activating
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PPPoATM
PPP over ATM sessions 43
deleting session 37
product
configuring 33
overview 1
de-activating
PPP over ATM 44
protocols 2
NAPT 37, 57
simple network management protocol
See SNMP
PPP 35
site requirements 6
SNMP 58
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rate vs.reach 65
request for comments 58
requirements
cables 11
installation 5
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phone service 9
power cable 9
service provider 9
site 6
system 6
reset unit 25
resetting modem 25
RFCs 58, 64
SNMP
agent 58
parameters
defining 29
protocol 58
software upgrading 51
specifications 61
ADSL 61
ATM 61
environmental 63
LAN interface 62
physical 62
power 63
WAN interface 61
static, NAT table parameters 40
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Static NAT entry
TFTP
add 42
description 78
delete 42
parameters, defining 28
server 59
statistics menu
time and date 31
LAN statistics 48
transmission rate
downstream 1, 55
WAN statistics 50
upstream 1, 55
storage 5
trivial file transfer protocol
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subnet mask description 78
support, MIB and trap 59
system
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statistics 45
See TFTP
troubleshooting 53
configuring settings 27
requirements 6
troubleshooting 53
system menu
U
unpacking modem 5
update configuration 22
upgrading software 51
factory default 23
upstream
reset unit 25
description 79
set date & time 31
transmission rate 1, 55
SNMP parameters 29
user assignments 37, 38
TFTP parameters 28
V
update configuration 22
upgrade software 51
VCI
addresses 56
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T
technical
support 69
technical specifications 61
86
configuration worksheet 74
viewing
ADSL status 45, 47
LAN statistics 48
network statistics 48
WAN statistics 50
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EIndex
VPI
addresses 56
W
wall mounting 8
WAN
configuring PPP over ATM 36
interface specifications 61
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viewing statistics 50
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configuration worksheet 74
warranty 69
web browser configuration 19
worksheets 73
login 74
VCI 74
VPI 74
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www.pairgain.com 69
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Megabit Modem 500L Installation Manual
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Tel: (714) 832-9922
Fax: (714) 832-9924
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For Technical Assistance:
(800) 638-0031
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Corporate Office
14402 Franklin Avenue
Tustin, CA 92780
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Certificated Firm
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