Paradyne COMSPHERE 3821PLUS User manual

13821-A2-GZ40-10 November 1996

COMSPHERE 3821

Plus

6-Port DTE Interface Assembly

(Feature 3821-F1-002)

Installation Instructions

Document Number 3821-A2-GZ40-10

November 1996

6-Port DTE Interface

Assembly Installation

The following instructions are intended for use in

conjunction with the COMSPHERE 3821Plus Modem

User’s Guide (3821-A2-GB20). Please read the Important

Safety Instructions in that document before proceeding

with the installation.

Install the NIM

The DTE interface assembly covers the network

interface module (NIM), so the NIM must be installed

first. The 3821Plus modem requires one of the following

NIMs:

•Part number 3000-F1-027 (3821Plus NIM with

Make Busy and Service Line Features), or

•Part number 3000-F1-028 (3821Plus NIM without

Make Busy and Service Line Features)

Install the NIM and connect its cables according to the

instructions in the user’s guide. Communications adapters

designed or configured for a 4-wire leased line, Digital

Data Service, or programmable PSTN interface cannot be

used with a 3821Plus NIM, and should not be installed in

the same side of the carrier.

Loosely Attach the DTE Interface Assembly

The 6-port DTE interface assembly can be mounted

over any two adjacent slots on the left or the right side of

the carrier. If you are installing only one NIM for

3821Plus modems, the DTE interface assembly must be

mounted on the same side of the carrier as the NIM.

1. Feed the tabs at the bottom of the DTE interface

assembly into the slots in the carrier. See the

illustration below.

2. Insert the screws provided. After tightening them,

loosen them one turn. You will tighten them in a

later step.

496-14876

3000 SERIES

CARRIER

SLOTS

TABS

DTE INTERFACE

ASSEMBLY

2November 1996 3821-A2-GZ40-10

Install the Circuit Cards

The 6-port interface assembly serves two circuit cards

in adjoining slots.

1. Slide the 3821Plus card into its slot in the

3000 Series Carrier. Press firmly until the back

edge of the card seats in the socket of the DTE

interface assembly.

2. Lower the circuit pack lock until it is vertical,

locking the 3821Plus card in place.

Front Panel

495-1480

3. Insert the second card, following steps 1 and 2.

4. When both cards are installed and locked in place,

tighten the screws on the DTE interface assembly.

The illustration on page 1 shows the DTE interface

assembly installation for 3821Plus cards in slots 15 and

16 of the carrier.

Connect the DTE

You can use two different kinds of cables to connect

each 3821Plus modem to a DTE:

•An RS-232 cable with DB25 connectors, or

•An 8-pin modular cable with a DB25 to 8-position

modular adapter for each end

The connectors on the DTE interface assembly are

labeled, from top to bottom, A, B, and C. These markings

show which modem on a card is associated with each

DTE connector.

1. Connect the DB25 adapter or the connector on an

RS-232 DTE cable to one of the DB25 connectors

on the DTE interface assembly. Use a small

screwdriver to fasten the connector to the interface

assembly.

2. Connect the DB25 adapter or connector on the

cable to the DB25 connector on the DTE. Use a

small flat-blade screwdriver to fasten the cable to

the DTE.

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