Paradyne COMSPHERE 3920PLUS Series Manual de usuario
1
3920-A2-GK41-60 February 2002
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.
2February 2002 3920-A2-GK41-60
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.
3
3920-A2-GK41-60 February 2002
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.
DIAGNOSTIC
CONTROL
PANEL
LCD AND
KEYPAD
STATUS
INDICATORS
SPEAKER POWER
SUPPLY
POWER
CORD
496-14684-01
LEASED
Model 3920
Plus
Singleport and
Multiport Housing
Singleport Modem
Back Panel Multiport Modem
Back Panel
POWER
ON/OFF
DIAL DTE 1NMS
POWER IN
DTE 2
DTE 3
DTE 4
POWER
ON/OFF
LEASED
DIALDTE 1
NMS
POWER IN
Figure 1. Model 3920Plus Standalone Singleport and Multiport Modems
4February 2002 3920-A2-GK41-60
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
496-14178a-04
EIA232/V.24
EDGE CARD
CONNECTOR
FUTURE
USE
BACK
CONNECTOR
PLATE
V.35
(3600/3500)
RS366A/V.25
(3800)
EIA232/V.24
TXD
RXD
RTS
CTS
DSR
DTR
LSD
103
104
105
106
107
108
109
Pwr
Alrm
Test
Dial
RI
Busy
Serv
SQ
Status
Front Panel
3921
Plus
142
125
Spkr
EIA232/V.24
CONNECTOR
FUTURE
USE
GROUNDING
TAB
Figure 2. Model 3921Plus Singleport Modem
5
3920-A2-GK41-60 February 2002
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.
49614423a-03
FACEPLATE
EDGE CARD
CONNECTORS
PORT
3
PORT
4
PORT
1
PORT
2
3921
Plus
TXD
RXD
RTS
CTS
DSR
DTR
LSD
Pwr
Alrm
Test
Dial
RI
Busy
Serv
SQ
Status
Front Panel
Spkr
142
125
103
104
105
106
107
108
109
13
24
Port
BACK
CONNECTOR
PLATES
DTE B DTE A
DTE B DTE A
Figure 3. Model 3921Plus Multiport Modem
6February 2002 3920-A2-GK41-60
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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3920-A2-GK41-60 February 2002
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.
8February 2002 3920-A2-GK41-60
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.
DTE 2 DTE 3 DTE 4
DTE 1LEASED DIAL NMS PWR ON OFF
!
DB-25-S CONNECTORS
8-POSITION,
8-CONDUCTOR
PLUG
8-POSITION,
8-CONDUCTOR
PLUG
DB-25-P
CONNECTOR
SUB-MINIATURE,
4-POSITION,
4-CONDUCTOR
PLUG
POWER
SUPPLY
POWER
CORD
495-14788
HUBBING
DEVICE
LEASED-LINE
NETWORK DATA
TERMINAL
EQUIPMENT
DIAL
NETWORK
6-POSITION,
4-CONDUCTOR
PLUG
NETWORK
MANAGEMENT
SYSTEM
OR
LEASED BACKUP
Figure 4. Model 3920Plus Multiport Back Panel and Power Supply
9
3920-A2-GK41-60 February 2002
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.
10 February 2002 3920-A2-GK41-60
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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7
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