392Xplus Modem Package; Model 3920Plus Modem Installation - Zhone COMSPHERE 3920Plus Installation Instructions Manual

392xPlus Modem Package

After opening the modem's package, check for damage and verify that the following items are present:
• Installation instructions
• Model 3920Plus modem
• Power supply
• One 6-position, 4-wire modular cord (in selected models)
• One 8-position, 8-wire modular cord (in selected models)
If any hardware components are damaged, notify your sales or service representative. Return equipment using the
procedures described in Government Requirements and Equipment Return on page 11.
Customer-Supplied Equipment
The following customer-supplied equipment is required to complete a data communications system using the
Model 3920Plus modem:
• A DTE with available EIA-232-D serial port.
• A standard EIA-232-D cable with a DB-25-P (plug) connector 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).

Model 3920Plus Modem Installation

Before installing your modem, read the Important Safety Instructions on page 10.
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 2) has the following switches and connectors:
• An ON/OFF power switch.
• A cylindrical 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.
• A 25-pin DB-25-S receptacle for the DTE interface.
3920-A2-GK47-10 February 2002
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