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COMSPHERE 392xPlus Modems
Models 3920Plus and 3921Plus
Installation Instructions
Document Number 3920-A2-GK41-60
February 2002
Overview
The COMSPHERE Model 392xPlus modems are full-feature, high-speed leased modems, providing reliable
asynchronous and synchronous operation over leased or dial-line networks with data rates as high as 33,600 bps.
Through downloading capability, any Model 392xPlus modem is upgradable to the latest firmware, requiring no
new hardware investment or on-site personnel, with little or no downtime. For more information on downloading
capability, refer to the Automatic Firmware Download section in Chapter 7, Control Branch, of the COMSPHERE
392xPlus Modems, Models 3920Plus and 3921Plus, Technical Reference Manual, Document No. 3920-A2-GH30.
Model 392xPlus modems support a wide range of modulation schemes and offer control using either AT
commands, the diagnostic control panel (DCP) or the optional COMSPHERE 6700 and 6800 Series Network
Management Systems (NMS). The NMS performs extensive monitoring, testing, reporting, and restoral functions
to assist in managing your network.
Model 392xPlus modems are compatible with a number of dialing methods and protocols, such as asynchronous
AT commands, ITU-T V.25bis dialing, and the DCP. The DCP allows you to use the Model 392xPlus modem in a
variety of applications and environments while also providing control over modem configuration, dialing, and
diagnostics. The Model 392xPlus modems come with preset factory configurations that are the most often used
modem settings.
This document provides the following information:
• A description of the COMSPHERE 392xPlus models
• A list of equipment supplied with the modem
• A list of customer-supplied equipment
• Installation instructions
• A 392xPlus Menu tree
• Important safety instructions
• Regulatory notices
• Government requirements and equipment return information
This document is intended to be used in conjunction with the COMSPHERE 392xPlus Modems, Models 3920Plus
and 3921Plus, Technical Reference Manual, Document No. 3920-A2-GH30. This manual is available on the
World Wide Web at www.paradyne.com. Select Library → Technical Manuals → Business Class Analog
Modems. Contact your sales or service representative to order product documentation.
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February 2002
1
COMSPHERE 392xPlus Models
The COMSPHERE 392xPlus modem is available in the following four models:
• Model 3920Plus standalone singleport modem (model no. 3920-A1-41x).
• Model 3920Plus standalone multiport modem (model no. 3920-A1-40x).
• Model 3921Plus carrier-mounted singleport modem (model no 3921-B1-01x).
• Model 3921Plus carrier-mounted multiport modem (model no. 3921-B1-00x).
The last digit in the model number (x) varies, depending on whether the modem is equipped with fixed Data
Access Arrangement (DAA) or configurable DAA*.
NOTE
Throughout this document, reference to the Model 392xPlus modem
represents all four models.
*Data Access Arrangement. Hardware that acts as a protective interface between the telephone circuit and the modem. It
performs such functions as ring detection, DC isolation, and surge protection to protect the circuit from being disturbed
by a modem malfunction.
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3920-A2-GK41-60
Model 3920Plus Singleport Modem
The Model 3920Plus singleport is a standalone modem (Figure 1) capable of either 4-wire/2-wire leased-line or
dial operation. This modem is controlled using either AT commands or the DCP. The DCP consists of a liquid
crystal display (LCD), three function keys, four directional keys, and a row of 13 LED status indicators. For a
better understanding of DCP operation, refer to Chapter 3, DCP Operation, in Document No. 3920-A2-GH30.
Model 3920Plus Multiport Modem
The Model 3920Plus multiport is a standalone modem (Figure 1), with an integral time division multiplexer
(TDM) and a modem sharing device (MSD) as standard equipment. The TDM provides time division
multiplexing of up to four independent ports over point-to-point lines using the V.34 family or V.32 family
modulation. The MSD allows multiple physical ports on a tributary modem to share a single communication
channel using the V.34 family, V.32 family, or TMp modulation. The TDM/MSD multiplexer (commonly referred
to as “mux”) can be enabled or disabled to allow a greater degree of application flexibility.
The 3920Plus multiport modem also operates over a 4-wire/2-wire leased or dial network and is controlled using
the same DCP employed on the Model 3920Plus singleport standalone modem.
Model 3920Plus Singleport and
Multiport Housing
DIAGNOSTIC
CONTROL
PANEL
LCD AND
KEYPAD
SPEAKER
POWER
SUPPLY
STATUS
INDICATORS
POWER
CORD
Singleport Modem
Back Panel
Multiport Modem
Back Panel
POWER
ON/OFF
DTE 4
POWER
ON/OFF
DTE 3
POWER IN
DTE 2
NMS
DTE 1
DIAL
LEASED
POWER IN
NMS
DTE 1
DIAL
LEASED
496-14684-01
Figure 1. Model 3920Plus Standalone Singleport and Multiport Modems
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Model 3921Plus Singleport Carrier-Mounted Modem
The Model 3921Plus singleport is a carrier-mounted modem (Figure 2) capable of either 4-wire/2-wire
leased-line or dial operation. The modem installs into a COMSPHERE 3000 Series Carrier, occupying a single
slot. The modem’s faceplate has sixteen (16) LED status indicators for displaying modem activity and an audio
speaker jack for the carrier’s optional speaker.
The modem’s back panel has two edge card connectors that mount into a connector plate. This connector plate has
two DB-25-S connectors, one providing an EIA-232-D DTE interface and one for future functionality.
FACEPLATE
Status
Pwr
Alrm
142
Test
BACK
CONNECTOR
PLATE
Dial
125
RI
Busy
Serv
EIA232/V.24
CONNECTOR
EIA232/V.24
EDGE CARD
CONNECTOR
RXD
105
RTS
106
CTS
107
DSR
108
DTR
109
LSD
GROUNDING
TAB
FUTURE
USE
Front Panel
Spkr
V.35 (3600/3500)
TXD
104
RS366A/V.25 (3800)
103
EIA232/V.24
SQ
FUTURE
USE
3921Plus
496-14178a-04
Figure 2. Model 3921Plus Singleport Modem
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Model 3921Plus Multiport Carrier-Mounted Modem
The Model 3921Plus multiport is a carrier-mounted modem (Figure 3) equipped with an integral time division
multiplexer (TDM) with a modem sharing device (MSD). The modem installs into the COMSPHERE 3000 Series
Carrier, occupying two slots. The modem’s faceplate covers two slots in the carrier. It has twenty (20) LED status
indicators for displaying modem activity and an audio speaker jack for the carrier’s optional speaker.
The modem’s back panel has four edge card connectors that mount into two connector plates. Each connector
plate has two DB-25-S connectors providing four EIA-232-DTE interfaces.
Both the singleport and multiport Model 3921Plus modems derive ac power from the COMSPHERE 3000 Series
Carrier’s backplane, which is a common bus to all devices installed in the carrier. The user interface to any
3921Plus modem is through the shared diagnostic control panel (SDCP), an optional feature which operates in a
manner similar to the DCP on the 3920Plus modems. For a better understanding of DCP operation, refer to
Chapter 3, DCP Operation, in Document No. 3920-A2-GH30.
FACEPLATE
Status
Pwr
EDGE CARD
CONNECTORS
Alrm
142
Test
Dial
125
RI
Busy
Serv
BACK
CONNECTOR
PLATES
SQ
1
3
Port
4
RXD
105
RTS
106
CTS
107
DSR
108
DTR
109
LSD
PORT
1
PORT
3
DTE A
104
DTE B
TXD
DTE A
103
DTE B
2
Front Panel
Spkr
PORT
2
PORT
4
3921Plus
49614423a-03
Figure 3. Model 3921Plus Multiport Modem
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392xPlus Modem Package
After opening the modem’s package, check for damage and verify that the following items are present:
For standalone models
• Installation instructions
• Model 3920Plus modem
• Power supply with power cord
• One 6-position, 4-wire modular cord (in selected models)
• One 8-position, 8-wire modular cord (in selected models)
For carrier-mounted models
• Installation instructions
• Model 3921Plus modem
• One (singleport) or two (multiport) connector plates with two DB-25-S edge card connectors on each plate
If any hardware components are damaged, notify your sales or service representative. Return equipment using the
procedures described in the Government Requirements and Equipment Return section.
Customer-Supplied Equipment
The following customer-supplied equipment is required to complete a data communications system using the
Model 3920Plus modem:
• One (singleport) or four (multiport) DTEs with available EIA-232-D serial port(s).
• Standard EIA-232-D cables with one (singleport) or four (multiport) DB-25-P (plug) connector(s) at one
end to attach to the modem.
• One or more of the following modular leased or dial network interfaces:
— JM8 for leased-line configurations.
— RJ11C for dial permissive configurations.
— One 8-position, 8-wire modular cord (for leased backup purposes).
The following customer-supplied equipment is required for the installation of a Model 3921Plus modem:
• A COMSPHERE 3000 Series Carrier.
• A 50-pin mass termination cable.
• One of the following modular or 50-pin leased or dial network interfaces:
— RJ11C for single-line dial permissive configurations.
— RJ21X for multiple-line dial permissive configurations.
— 66 punchdown block.
• One Network Interface Module (NIM) for modems installed in Slots 1–8 and one NIM for modems
installed in Slots 9–16 (required for dial-line configurations).
For installation of the COMSPHERE 3000 Series Carrier into a cabinet, refer to the COMSPHERE 3000 Series
Carrier, Installation Manual, Document No. 3000-A2-GA31.
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Model 3920Plus Modem Installation
Before installing your standalone modem, make sure your installation site is clean and well-ventilated. Allow
space around the modem for installing cables and telephone cords, and make sure the modem is located within
reach of the ac power outlet. The distance between your modem and DTE should be minimized if DTE data rates
exceed 19,200 bps. Also, low capacitance cables may be necessary for speeds greater than 19,200 bps or distances
greater than 50 feet.
The back panel of the Model 3920Plus modem (Figure 4) has the following switches and connectors:
• An ON/OFF power switch.
• An 8-pin DIN type power receptacle (PWR) for the dc power supply.
• An 8-pin modular keyed jack (LEASED) for 4-wire/2-wire leased lines.
• An 8-pin modular keyed jack (DIAL) for backup lines (2-wire dial or 2-wire leased).
• A 4-pin modular jack (NMS) for the Network Management System connection.
• One (singleport) or four (multiport) 25-pin DB-25-S receptacles for the DTE interfaces.
Model 3920Plus Input Voltage Requirements
The power supply used with the Model 3920Plus modem (Figure 4) is auto-sensing and capable of operating
(without reconfiguration) with input voltages from 100 Vac to 250 Vac, and input frequencies from 50 Hz to
60 Hz.
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Connecting Cables to the Model 3920Plus Modem
Instructions for connecting cables to the TELCO jack types using the appropriate cables apply to both singleport
and multiport Model 3920Plus modems. Figure 4 illustrates the Model 3920Plus multiport modem. For pin
assignments, refer to Appendix C, Pin Assignments, in Document No. 3920-A2-GH30.
DB-25-S CONNECTORS
DTE 2
DTE 3
LEASED DIAL
LEASED-LINE
NETWORK
8-POSITION,
8-CONDUCTOR
PLUG
DIAL
NETWORK
6-POSITION,
4-CONDUCTOR
PLUG
OR
LEASED BACKUP
8-POSITION,
8-CONDUCTOR
PLUG
DTE 1
DTE 4
NMS
PWR
!
ON OFF
DATA
TERMINAL
EQUIPMENT
DB-25-P
CONNECTOR
NETWORK
MANAGEMENT
SYSTEM
SUB-MINIATURE,
4-POSITION,
4-CONDUCTOR
PLUG
POWER
SUPPLY
HUBBING
DEVICE
POWER
CORD
495-14788
Figure 4. Model 3920Plus Multiport Back Panel and Power Supply
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Data Terminal Equipment Connection
Use the following steps to connect an EIA-232-D cable from the modem to a DTE:
1. Make sure the modem is powered OFF.
2. Connect the DB-25-P (plug) connector on the cable to a DB-25-S (socket) connector (Figure 4) on the
modem’s back panel, labeled DTE 1 – DTE 4. Use a small screwdriver to secure the cable to the modem.
3. For each port, connect the DB-25-P connector on the cable to the DB-25-S connector on the DTE. Use a
small screwdriver to secure the cable to the DTE(s).
NOTE
DTE rates above 19.2 bps require cable lengths less than fifty feet
as specified by the RS232 standard.
Power Supply Connection
Use the following steps to connect the modem to an ac power outlet:
1. Make sure the modem is powered OFF.
2. Insert the power supply’s 8-pin DIN connector into the modem’s back panel dc power receptacle, labeled
PWR (Figure 4).
3. Connect the power cord to the power supply.
4. Connect the power cord to a grounded ac power outlet.
Leased-Line Network Connection
Use the following steps to connect the leased-line network interface:
1. Insert the 8-position, 8-conductor modular plug into the jack labeled LEASED (Figure 4).
2. Insert the other end of the modular cord into the leased-line network interface.
3. If the Model 3920Plus has a backup line, follow the steps listed in the Dial Backup Connection section.
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Dial Network Connection
The telephone company provides the line termination jacks for the permissive service you request. Advance
coordination with the telephone company is suggested when connecting the modem to telephone dial lines
(PSTN).
In the Permissive mode, the modem’s transmit output level is fixed at –9 dBm. The telephone company assumes
that the line loss is 3 dB and no compensation is provided for additional losses. A Permissive mode telephone line
is usually terminated with a USOC RJ11C jack.
Leased Backup Connection
Use the following steps to connect the modem to the 2-wire leased backup network interface:
1. Insert the 8-position, 8-conductor modular plug into the jack labeled DIAL (Figure 4).
2. Insert the other end of the modular cord into the leased-line network interface.
Dial Backup Connection
Use the following steps to connect the modem to the dial network interface:
1. Insert the 6-position, 4-conductor modular plug into the jack labeled DIAL (Figure 4).
2. Insert the other end of the modular cord into the dial network interface.
Network Management System Connection
Use the following steps to connect the modem to the network management system (NMS) interface:
1. Insert the sub-miniature, 4-conductor modular plug of the 3600 Hubbing Device into the jack labeled
NMS (Figure 4). Refer to Document No, 3610-A2-GZ45, 3600 Hubbing Device, Feature Number
3600-F3-300, Installation Instructions, for a description of the 3600 Hubbing Device. Installation for the
3920Plus is the same as for the 3610 DSU.
2. Connect the 3600 Hubbing Device to the network management system (Figure G-5 in Appendix G of
Document No. 3920-A2-GH30).
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Removing and Replacing the Model 3920Plus Modem
To remove and replace the Model 3920Plus modem, perform the following steps:
1. Make sure the modem is offline. Press the modem’s back panel power switch to OFF.
2. Disconnect the power cord from the ac power outlet.
3. Disconnect the dc power cable from the connector on the back of the modem.
4. Disconnect the leased-line and dial modular cord(s) from the modem’s back panel.
5. Disconnect the DTE interface cable(s) from the modem’s back panel.
If the modem is to be removed for service, return it to the company using the procedures described in the
Government Requirements and Equipment Return section.
6. Install the replacement modem as described in the Model 3920Plus Modem Installation section, and
configure it the same way as the modem being replaced.
Model 3921Plus Modem Installation
CAUTION
When removing the Model 3921Plus from the carrier, always
use a ground strap when handling the modem. Always store
the Model 3921Plus in an antistatic bag when it is removed
from the carrier.
The 3921Plus modems are designed for installation in a COMSPHERE 3000 Series Carrier, which supplies both
the operating power and the leased and/or dial network connections. For additional information about the
COMSPHERE 3000 Series Carrier, refer to the COMSPHERE 3000 Series Carrier, Installation Manual,
Document No. 3000-A2-GA31.
The COMSPHERE 3000 Series Carrier has 17 slots that holds up to 8 Model 3921Plus multiport modems or
16 Model 3921Plus singleport modems, and one shared diagnostic unit (SDU). The SDU is required when the
modems in the carrier are controlled by an NMS, or when multiple carriers in a cabinet configuration are to be
controlled by a single shared diagnostic control panel (SDCP). The SDCP of the COMSPHERE 3000 Series
Carrier is the user interface to the Model 3921Plus modem. A single SDCP can control up to eight carriers.
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1. At the back of the carrier, install the connector plates (Figure 5). Make sure the plate(s) use the same slot
positions as that intended for the modem.
Loosely fasten the plate(s). This allows for slight adjustments later when installing the modem.
DTE A
DTE A
PORT 3
PORT 1
EIA232/V.24
SINGLEPORT
BACK
CONNECTOR PLATE
MULTIPORT
BACK
CONNECTOR PLATES
EIA232/V.24
CONNECTOR
V.35 (3600/3500)
PORT 2
RS366A/V.25 (3800)
DTE B
PORT 4
DTE B
GROUNDING
TAB
FUTURE USE
495-14696-01
Figure 5. Modem’s Back Connector Plates
2. At the front of the carrier, hold the modem vertically, with the latch on its faceplate in the open position,
and insert it into the top and bottom card guides of one of the slots numbered 1–15 (Figure 6).
Slide the modem into the slot, aligning the modem with the connector plates, until the backplane
connector and DTE connector seat firmly into the back of the carrier. The faceplate latch automatically
closes as you push the modem into the carrier. To lock the modem into the carrier, press the faceplate latch
until a “click” is heard.
3. If the carrier is ON, the Power LED on the faceplate of the Model 3921Plus lights. After several seconds
the modem completes its power-up self-test, in which all faceplate LEDs light.
Return to the back of the carrier and tighten the connector plate(s).
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3000 SERIES
CARRIER
SDU
MODEL 3921Plus
SINGLEPORT
MODEM
LATCH
CIRCUIT CARD
GUIDES
3000 SERIES
CARRIER
SDU
MODEL 3921Plus
MULTIPORT
MODEM
LATCH
CIRCUIT CARD
GUIDES
495-14708
Figure 6. Installing the Model 3921Plus Modem
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If the 3921Plus modem is to communicate with an installed SDCP, install the modem as described above and
perform the following steps:
1. Press the Select key on the SDCP. The Carr:Slot screen appears with the cursor on the slot selection
position (01 on the first LCD line in following screen example).
Carr:Slot:
↑
↓
F1
F2
1:01A
1:01A
F3
2. Press the F1 ( " ) or F2 ( # ) key until the slot number you want appears.
3. If you have more than one carrier, press the
key to move the cursor to the carrier selection position
(1: on the first LCD line in the following screen example).
Carr:Slot:
↑
↓
F1
F2
1:01A
1:01A
F3
4. Press the F1 ( " ) or F2 ( # ) key until the carrier number you want appears.
The carrier number selection has a range of 1 to 8 since a single SDCP can control a configuration of up
to eight carriers. (This is only possible if the SDU is installed.)
5. Press the
Select
key to place the SDCP in direct communication with the selected modem.
The LCD displays the Top-Level menu for the selected modem. In addition, the Front Panel LED on the
modem’s faceplate and the OK LED on the SDCP light.
6. Once you have determined that the modem is installed properly and completed its power-up self-test,
rotate the circuit pack lock until it covers the faceplate latch (Figure 7) and tighten the retention screw on
the circuit pack lock. This prevents the modem from accidently being removed once it is installed in a
carrier.
7. Configure the modem as described in the Selecting Factory Configuration Options section in this
document.
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CIRCUIT
PACK
LOCK
LATCH
OPEN
CLOSED
RELEASE TAB
495-14425-02
Figure 7. Circuit Pack Lock
Removing the Model 3921Plus Modem
CAUTION
When removing the Model 3921Plus modem from the carrier,
always use a ground strap when handling the modem. Always
store the 3921Plus modems in an antistatic bag when it is
removed from the carrier.
It is not necessary to power down the carrier to remove the Model 3921Plus modem. Perform the following steps:
1. Rotate the circuit pack lock until the release tab is exposed (refer to Figure 7).
2. Press down on the release tab and pull the modem away from the carrier’s backplane.
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Model 392xPlus Modem Power-Up
Once your modem is properly connected to the power supply, leased and/or dial lines, and the DTE, press the
modem’s back panel power switch to the ON position. The modem begins a power-up self-test, in which all DCP
LEDs light. This test takes several seconds to perform, and verifies the operation of most hardware components
within the modem. If successful, the LCD displays Power on Selftst Passed and continues to the Top-Level
menu screen.
Power On Selftst
Passed
F1
F2
F3
If a failure occurs during the self-test, the LCD displays Power On Selftst Failed for several seconds. The LCD
then displays the Top-Level menu screen with the message Power on Fail appearing on the top line of the LCD.
Although a failure has occurred, the modem will attempt to operate. This allows you to activate a more thorough
self-test using the Test branch. Refer to Chapter 8, Test Branch, in Document No. 3920-A2-GH30.
Selecting Factory Configuration Options
After the modem passes the power-up self-test, configure it for operation using one of the six factory preset
configurations.
The Model 392xPlus modems have six factory preset templates that contain the most commonly used
configuration options (straps) for Synchronous Leased (Answer or Originate), Asynchronous Leased (Answer or
Originate), Trellis Multipoint (Control or Tributary), Asynchronous Dial, Synchronous Dial, and UNIX Dial
hardware network configurations. Your modem ships from the factory with the Synchronous Leased (Answer)
default configuration options stored in memory. If Synchronous Leased (Originate), Asynchronous Leased
(Answer or Originate), Trellis Multipoint (TMp) (Control or Tributary), Async Dial, Sync Dial, or UNIX Dial is
more appropriate for your configuration, then you must change the factory setting using either the modem’s DCP
(as described in the following sections) or the AT command set.
The purpose of having preset configurations is so that you can have a “head start” in getting your modem
operating and reducing the amount of time required to configure your modem. For a better understanding of DCP
operation and factory preset configuration options, refer to Chapter 5, Configure Branch, in Document No.
3920-A2-GH30.
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Using the Diagnostic Control Panel (DCP)
The DCP’s liquid crystal display (LCD) consists of two 16-character lines which display modem status, control
functions, and configuration options as well as indicating your location in the Top-Level menu tree.
To change a factory template from the Sync Leased preset configuration using the DCP, perform the following
steps:
1. Press the function key below Configure to select the Configure branch.
The LCD now displays Ld EditArea frm.
key until Factory comes into view, then press the F1 key to display the factory preset
2. Press the
configurations.
Factory preset configurations are Sync Leased, Async Leased, TMp (Trellis Multipoint), Async Dial,
Sync Dial, and UNIX Dial. If Sync Leased or Async Leased is selected, you must choose either Answer
or Originate mode. If TMp is selected, you must choose either Control or Trib (Tributary) mode.
3. Press the
key until the appropriate factory preset appears on the LCD, and press the corresponding
function key to select your choice. (For certain factory presets you will also need to choose the
appropriate mode.)
4. Choose Function appears and displays the Edit and Save functions.
5. Press the F3 key (Save) to save the new factory preset configuration to one of three configuration areas,
Active (Saved), Customer 1, or Customer 2.
(These three configuration areas are nonvolatile memory locations. Active (Saved) contains the most
recently saved changes to any configuration options. In the event of power loss, the modem retrieves these
configuration options. Customer 1 and Customer 2 are user-defined configuration areas.)
The LCD now displays Sav EditArea to.
6. Press the
key until the appropriate configuration area appears on the LCD, then press the
corresponding function key to select your choice. (Saving configuration options to the Active (Saved)
configuration area automatically saves them to the Active (Operating) configuration area.) The LCD
displays Command Complete.
7. The modem is now configured with the selected factory template. Press the
Top-Level menu.
key to return to the
Refer to Chapter 5, Configure Branch, in Document No. 3920-A2-GH30, for more information regarding default
factory configuration options.
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Menu Tree
The following pages provide a graphic representation of the general menu structure of the front panel or SDCP
display. Use the Menu Tree for reference when performing the modem’s various functions.
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Displays current status of modem along with
data rate and error control mode.
"Status"
Status
Configure
PList
Ld EditArea frm:
Activ
(Operating)
Identity
VF
Major
Minor
Status
Dial
Thresh
Security
Port1
Port2
Port3
Port4
Backup
SDC
V.34
DTE
Ser#
Mod#
FRev
HPt#
FPt#
Country
Display Clear
SigQual
RcvLevel
Sig/Noise
NrEchLv
FarEchLv
FarEchDel
EchoFreqOff
Phase Hts
Impul Hts
DropOuts
Retrains
Phas Jtr
NonLnear
FreqOffset
Gain Hts
Tx
Rx
DTE Rate
Cmp Ratio
Efficiency
LSD
DTR
DSR
Tst
TXD
RXD
RTS
CTS
Display Clear Change Add Acquire
Factory
Customer2
Port Select
(Multiport
mode)
DeviceHS
(Tributary
only)
Customer1
Active
(Saved)
Active
Delete
Skip
Sync_Leased
Async_Leased
Record
Service_Log
Options
Control
Answer
Sync_Dial
Async_Dial
UNIX_Dial
TMp
Choose Mode
Choose Mode
Line = Pri 4W APL
Display
Line = Pri 2W APL
Clear
Line = Bkup 2W APL
Line = Dial Backup
Line = Dial ONLY
Line = No Sync
TxRate
RxRate
SymbolRate
TxLevel
AsymRate
to next page
Originate
Trib
Choose Function
Save
Edit StrapGroup
Customer1
Active
(Saved)
(Singleport mode
only)
DTE_Interface
(Singleport mode
& Async only)
Line_Dialer
DTE_Dialer
Customer2
Leased_Line
Dial_Line
(Singleport mode
only)
Test
V42/MNP/Buffer
Security
Misc
(Mux Enabled only)
MUX
* Not shown when the Digital Bridge configuration option is enabled.
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Copy
Port1 Port2* Port3* Port4*
Rate*
February 2002
Async
EIA
98-15921a
19
(Singleport
mode only)
from previous page
Control
Test
SubHS
Call_Setup
Tlk/Data
Security
(Dial
Backup
only)
Dial
Answer
Disconnect
Choose Address
(TMp Control only)
Change_Directory
Choose Password
(TMp only)
Dial_Standby
or
Return_to_Dial
Secondary
Directory Locations 1 – 24
Self
Abort
Rem_Digital_Loop
Loc_Analog_Loop
Loc_Digital_Loop
Set_Access_Ctrl
Data_Stream
Reset
Make_Busy
or
RemoveMakeBusy
EIA_LEDS
Reset_Security
(Admin Password?)
Download_Code
(DownloadSoftware)
Service_Line
or
DiscServLine
Prim
(data blckd)
(ExitRem appears
instead of Remote when
using Remote mode)
Pattern
(3921Plus
only)
Speaker
Remote
VF_Thresh_Update
EditPassWdTable
Set_Orig_Secur
Set_Answer_Sec
Set_Admin_PsWd
Does not appear in TMp Control
mode.
Does not appear in Remote
mode. (Self, Loc_Digital_Loop,
and Pattern appear if the
secondary channel is used.
Rem_Digital_Loop does not
appear in TMp mode.)
98-15921b
20
February 2002
3920-A2-GK41-60
Important Safety Instructions
1. Read and follow all warning notices and instructions marked on the product or included in this document.
2. This product is intended to be used with a three-wire grounding type plug — a plug which has a
grounding pin. This is a safety feature. Equipment grounding is vital to ensure safe operation. Do not
defeat the purpose of the grounding type plug by modifying the plug or using an adapter.
Prior to installation, use an outlet tester or a voltmeter to check the ac receptacle for the presence of earth
ground. If the receptacle is not properly grounded, the installation must not continue until a qualified
electrician has corrected the problem.
If a three-wire grounding type power source is not available, consult a qualified electrician to determine
another method of grounding the equipment.
3. Slots and openings in the cabinet are provided for ventilation. To ensure reliable operation of the product
and to protect it from overheating, these slots and openings must not be blocked or covered.
4. Do not allow anything to rest on the power cord and do not locate the product where persons will walk on
the power cord.
5. Do not attempt to service this product yourself, as opening or removing covers may expose you to
dangerous high voltage points or other risks. Refer all servicing to qualified service personnel.
6. General purpose cables are provided with this product. Special cables, which may be required by the
regulatory inspection authority for the installation site, are the responsibility of the customer.
7. When installed in the final configuration, the product must comply with the applicable Safety Standards
and regulatory requirements of the country in which it is installed. If necessary, consult with the
appropriate regulatory agencies and inspection authorities to ensure compliance.
8. A rare phenomenon can create a voltage potential between the earth grounds of two or more buildings. If
products installed in separate buildings are interconnected, the voltage potential may cause a hazardous
condition. Consult a qualified electrical consultant to determine whether or not this phenomenon exists
and, if necessary, implement corrective action prior to interconnecting the products.
In addition, if the equipment is to be used with telecommunications circuits, take the following precautions:
– Never install telephone wiring during a lightning storm.
– Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
– Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at
the network interface.
– Use caution when installing or modifying telephone lines.
– Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk
of electric shock from lightning.
– Do not use the telephone to report a gas leak in the vicinity of the leak.
3920-A2-GK41-60
February 2002
21
Notices
WARNING
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 THE INSTRUCTION MANUAL, MAY CAUSE HARMFUL INTERFERENCE
TO RADIO COMMUNICATIONS. OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE
HARMFUL INTERFERENCE IN WHICH CASE THE USER WILL BE REQUIRED TO CORRECT THE INTERFERENCE AT
HIS OWN EXPENSE.
THE AUTHORITY TO OPERATE THIS EQUIPMENT IS CONDITIONED BY THE REQUIREMENTS THAT NO
MODIFICATIONS WILL BE MADE TO THE EQUIPMENT UNLESS THE CHANGES OR MODIFICATIONS ARE EXPRESSLY
APPROVED BY PARADYNE.
WARNING
TO USERS OF DIGITAL APPARATUS IN CANADA:
THIS CLASS [A] DIGITAL APPARATUS MEETS ALL REQUIREMENTS OF THE CANADIAN INTERFACEĆCAUSING
EQUIPMENT REGULATIONS.
CET APPAREIL NUMERIQUE DE LA CLASSE [A] RESPECTE TOUTES LES EXIGENCES DU REGLEMENT SUR LE
MATERIEL BROUILLEUR DU CANADA.
Government Requirements and Equipment Return
For regulatory approval, refer to the product labeling or contact your local representative.
For the 3920Plus standalone modems, the Universal Service Order Code (USOC) for Permissive mode is RJ11C.
The Canadian equivalent to RJ11C is CA11A. For 3900 Series carrier-mounted modems, the USOC for
Permissive mode is RJ21X. The Canadian equivalent to RJ21X is CA21A.
Certain governments require that instructions pertaining to modem connection to the public switched telephone
network be included in the installation document. Specific instructions are listed in the following sections.
United States
NOTICE TO USERS OF THE PUBLIC SWITCHED TELEPHONE NETWORK
1. This equipment complies with Part 68 of the FCC rules. On the equipment is a label that contains, among
other information, the FCC registration number and ringer equivalence number (REN) for this equipment.
The label is located on the bottom of the Model 3920Plus modem and on the modem’s circuit card
assembly on the Model 3921Plus modem. If requested, this information must be provided to the telephone
company.
2. An FCC compliant telephone cord and modular plug is provided with this equipment. This equipment is
designed to be connected to the telephone network or premises wiring using a compatible modular jack
which is Part 68 compliant. See the Model 3921Plus Modem Installation section for details.
22
February 2002
3920-A2-GK41-60
3. The ringer equivalence (REN) is used to determine the quantity of devices which may be connected to the
telephone line. Excessive RENs on the telephone line may result in the devices not ringing in response to
an incoming call. In most, but not all areas, the sum of the RENs should not exceed five (5.0). To be
certain of the number of devices that may be connected to the line, as determined by the total RENs,
contact the telephone company to determine the maximum RENs for the calling area.
4. If the 392xPlus modem causes harm to the telephone network, the telephone company will notify you in
advance that temporary discontinuance of service may be required. But if advance notice is not practical,
the telephone company will notify the customer as soon as possible. Also, you will be advised of your
right to file a complaint with the FCC if you believe it is necessary.
5. The telephone company may make changes in its facilities, equipment, operations, or procedures that
could affect the operation of the equipment. If this happens, the telephone company will provide advance
notice in order for you to make the necessary modifications in order to maintain uninterrupted service.
6. If you experience trouble with this equipment, please contact your sales or service representative (as
appropriate) for repair or warranty information. If the product needs to be returned to the company service
center for repair, contact them directly for return instructions using one of the following methods:
• Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com
• Via Telephone: Call our automated call system to receive current information via fax or to speak with
a company representative.
— Within the U.S.A., call 1-800-870-2221
— Outside the U.S.A., call 727-530-2340
If the trouble is causing harm to the telephone network, the telephone company may request that you
remove the equipment from the network until the problem is resolved.
7. The user is not authorized to repair or modify the equipment.
8. This equipment cannot be used on public coin service provided by the telephone company. Connection to
Party Line Service is subject to state tariffs. (Contact the state public utility commission, public service
commission or corporation commission for information.)
Canada
NOTICE TO THE USERS OF THE CANADIAN PUBLIC SWITCHED TELEPHONE NETWORK
The Canadian Department of Communications label identifies certified equipment. This certification means that
the equipment meets certain telecommunications network protective, operational and safety requirements. The
Department does not guarantee the equipment will operate to the user’s satisfaction.
Before installing this equipment, the user should ensure that it is permissible to be connected to the facilities of
the local telecommunications company. The equipment must also be installed using an acceptable method of
connection. In some cases, the company’s inside wiring associated with a single line individual service may be
extended by means of a certified connector assembly (telephone extension cord). The customer should be aware
that compliance with the above conditions may not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the
supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the
telecommunications company cause to request the user to disconnect the equipment.
3920-A2-GK41-60
February 2002
23
Users should ensure for their own protection that the electrical ground connections of the power utility, telephone
line and internal metallic water pipe system, if present, are connected together. This precaution may be
particularly important in rural areas.
CAUTION
Users should not attempt to make such connections
themselves, but should contact the appropriate electric
inspection authority, or electrician, as appropriate.
If your equipment is in need of repair, follow the procedures in the Government Requirements and Equipment
Return section.
Warranty, Sales, and Service Information
Contact your local sales representative, service representative, or distributor directly for any help needed. For
additional information concerning warranty, sales, service, repair, installation, documentation, training, distributor
locations, or Paradyne worldwide office locations, use one of the following methods:
• Internet: Visit the Paradyne World Wide Web site at www.paradyne.com
• Telephone: Call our automated system to receive current information via fax or to speak with a company
representative.
— Within the U.S.A., call 1-800-870-2221
— Outside the U.S.A., call 1-727-530-2340
*3920-A2-GK41-60*
*3920–A2–GK41–60*
Copyright E 2002 Paradyne Corporation
24
February 2002
3920-A2-GK41-60
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