Digicom 3911 operation manual Standalone Model 3910 4-Wire/2-Wire Modem

Introduction

Standalone Model 3910 4-Wire/2-Wire Modem

The standalone Model 3910 modem (Figure 1-1) is capable of either 4-wire/2-wire leased-line or dial operation. The modem is controlled using either AT commands or 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.

DIAGNOSTIC

CONTROL

PANEL

LCD AND

KEYPAD

SPEAKER

STATUS

INDICATORS

POWER

SUPPLY

POWER

CORD

POWER

ON/OFF

POWER IN

NMS

DTE 1

DIAL

LEASED496-14160-03

Figure 1-1. Model 3910

The rear 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 connector.

3910-A2-GN32-40 September 1998 1-3