Comsphere 392Xplus Models; Standalone Model 3920Plus 4-Wire/2-Wire Modem - Paradyne Comsphere 3920Plus Installation And Operation Manual

COMSPHERE 392xPlus Modems
COMSPHERE 392x Plus Models
The 392xPlus family is available in two models: the Model 3920Plus, a 4-wire/2-wire standalone
modem, and the Model 3921Plus, a carrier-mounted version of the standalone unit.
Standalone Model 3920 Plus 4-Wire/2-Wire Modem
The standalone Model 3920Plus modem (Figure 1-1) is capable of either 4-wire/2-wire leased-line
or dial operation. The modem is controlled using the diagnostic control panel (DCP). The DCP
consists of a liquid crystal display (LCD), three function keys, four directional keys, and a row of
13 LED status indicators. For a better understanding of DCP operation, refer to Chapter 3, DCP
Operation.
The rear panel of the modem contains an ON/OFF power switch, a low voltage dc power
connector, an 8-pin modular connector (LEASED) for leased-line connection, an 8-pin modular
connector (DIAL) for dial-line or leased-line backup, a 4-pin modular connector (NMS) for
network management, and a DB-25-S DTE connectors.
1-4
Figure 1-1. Model 3920 Plus
April 1995 3920-A2-GN31-10