Paradyne 392xPLUS operation manual Model 3920Plus Modem Installation

Modem Installation

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 2-1) 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.

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 2-1 illustrates the Model 3920Plus multiport modem. For pin assignments, refer to Appendix C.

3920-A2-GN31-30 November 1996 2-3