Installation manual

February 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.