Digicom COMSPHERE 3911 User Manual
Introduction
1-3
3910-A2-GN32-40
September 1998
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.
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.
SPEAKER
DIAGNOSTIC
CONTROL
PANEL
LCD AND
KEYPAD
STATUS
INDICATORS
POWER
SUPPLY
POWER
CORD
496-14160-03
POWER
ON/OFF
ON/OFF
LEASED
DIAL
DTE 1
NMS
POWER IN
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.
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.