Paradyne 392xPLUS Comsphere 392xPlus Models, Model 3920Plus Standalone Singleport Modem

COMSPHERE 392xPlus Modems

COMSPHERE 392xPlus Models

The COMSPHERE 392xPlus modem is available in the following four models:

•Model 3920Plus standalone singleport modem (model no. 3920-A1-41x).

•Model 3920Plus standalone multiport modem (model no. 3920-A1-40x).

•Model 3921Plus carrier-mounted singleport modem (model no. 3921-B1-01x).

•Model 3921Plus carrier-mounted multiport modem (model no. 3921-B1-00x).

The last digit in the model number (x) varies, depending on whether the modem is equipped with fixed Data Access Arrangement (DAA) or configurable DAA.

NOTE

Throughout this manual, reference to the 392xPlus modem represents all four models.

Model 3920Plus Standalone Singleport Modem

The Model 3920Plus singleport is a standalone modem (Figure 1-1) capable of either

4-wire/2-wire leased-line or dial operation. This modem is controlled using either AT commands or the 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.

Model 3920Plus Standalone Multiport Modem

The Model 3920Plus multiport is a standalone modem (Figure 1-1), with an integral time division multiplexer (TDM) and a modem sharing device (MSD) as standard equipment. The TDM provides time division multiplexing of up to four independent ports over point-to-point lines using the V.34 family or V.32 family modulation. The MSD allows multiple physical ports on a tributary modem to share a single communication channel using the V.34 family, V.32 family, or TMp modulation. The TDM/MSD multiplexer (commonly referred to as ªmuxº can be enabled or disabled to allow a greater degree of application flexibility.

The 3920Plus multiport modem also operates over a 4-wire/2-wire leased or dial network and is controlled using the same DCP employed on the Model 3920Plus singleport standalone modem.

1-2 November 1996 3920-A2-GN31-30