Paradyne COMSPHERE 3820Plus Manuale utente

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COMSPHERE 3820

Plus

Modems

Model 3982-A1-401

Installation Instructions

Document Number 3982-A2-GK40-00

June 1995

Overview

The 3820Plus modem, Model 3982-A1-401 (Figure 1),

has different installation instructions than those shown in

the COMSPHERE 3800Plus Modems User’s Guide

(3980-A2-GB30-10). The Model 3982-A1-401 modem

has an 8-pin modular jack for leased-line connection and a

6-pin modular jack for dial-line connection. The model

shown in the User’s Guide has a single jack for leased-line

or dial-line connection.

Use these instructions to install your modem, and keep

them with your User’s Guide.

Figure 1. 3820

Plus

Modem (Model 3982-A1-401)

dyn

3820

Plus

Modem Installation

Before installing your 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 the 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 rear panel of the 3820Plus modem has the

following switches and connectors (see Figure 2):

•An ON/Off power switch.

•An 8-pin DIN type power receptacle for the

table-top power supply.

•An 8-pin modular keyed jack for 2-wire leased

lines.

•A 6-pin modular keyed jack for dial (PSTN) lines.

•A 4-pin modular jack for network management

system (NMS) connection.

•A 25-pin DB-25-S receptacle for DTE interface.

8-POSITION

PLUG FOR

LEASED-LINE

NETWORK

OPERATION

6-POSITION PLUG

FOR PERMISSIVE

DIAL NETWORK

OPERATION

DB-25-P

CONNECTOR

FOR DATA

TERMINAL

EQUIPMENT

OPERATION

SUB-MINIATURE,

4-CONDUCTOR

PLUG FOR

NETWORK

MANAGEMENT

SYSTEM

OPERATION POWER

SUPPLY

DTE 1LEASED DIAL NMS PWR ON OFF

POWER

CORD

Figure 2. 3820

Plus

(Model 3982-A1-401)

Rear Panel

DTE Connection

Use the following procedure to connect the RS-232D

cable from the modem to the DTE:

1. Make sure the modem’s rear panel power switch is

Off.

2. Connect the DB-25-P (male) connector on the

cable to the DB-25-S (female) connector labeled

DTE 1 (Figure 2) on the modem’s rear panel. Use

a small screwdriver to tighten the cable to the

modem.

3. Connect the DB-25-P connector on the cable to

the DB-25-S connector on the DTE. Use a small

screwdriver to tighten the cable to the DTE.

Connecting 3820

Plus

Modems

with Supplied Cables

Figure 2 shows how 3820Plus modems are connected

to certain TELCO jack types using the supplied cables.

For other TELCO connections, refer to Appendix D of the

COMSPHERE 3800Plus Modems User’s Guide.

3820

Plus

Dial-Line Connection

Use the following procedure to connect the 3820Plus

modem to the dial network interface:

1. Insert the 6-position, 4-conductor modular plug

into the jack labeled DIAL (Figure 2).

2. Insert the other end of the modular cord into the

dial network interface (“demarc”).

3820

Plus

2-Wire Leased-Line Network

Connection

Use the following procedure to connect a 3820Plus

modem to the leased-line network interface:

1. Insert the 8-position, 8-conductor modular plug

into the jack labeled LEASED (Figure 2).

2. Insert the other end of the modular cord into the

leased-line network interface (“demarc”).

AC Power Supply Connection

WARNING

Power supplies from other

modems may fit into the DIN

jack, but connecting the

wrong power supply can

cause damage to the modem

or the power supply.

Use the following procedure to connect the modem to

an ac power outlet:

1. Make sure the modem’s power switch is in the Off

position.

2. Insert the power transformer’s 8-pin DIN male

connector into the modem’s rear panel power

receptacle (Figure 2).

3. Connect the power supply to a grounded ac power

outlet.

Network Management System

Connection

Use the following procedure to connect the modem to

the network management system interface:

1. Insert the subminiature 4-conductor modular plug

of the 3600 Hubbing Device (Figure 3) into the

jack labeled NMS (Figure 2).

2. Connect the 3600 Hubbing Device to the network

management system.

Refer to the 3600 Hubbing Device, Feature Number

3600-F3-300, Installation Instructions for more

information. Installation for the 3820Plus modem is the

same as for the 3610 DSU.

Modem Power-Up

Once your modem is properly connected to the DTE,

dial and/or leased lines, and ac outlet, press the modem’s

rear panel power switch to the ON position. The modem

begins a power-up self-test. 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

F2 F3

If a failure occurs during the self-test, the LCD may

display Power On Selftst Failed for several seconds. The

LCD then may display 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

may attempt to operate. If it does, you can activate a more

thorough self-test using the Test branch. Refer to

Chapter 6, Test Branch, in the COMSPHERE 3800Plus

Modems User’s Guide.

Figure 3. 3600 Hubbing Device

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