Paradyne COMSPHERE 3910 Installation Instructions Manual page 8

The rear panel of the Model 3910 modem (Figure 1) has the following switches and connectors:
An ON/OFF power switch.
An 8-pin DIN type power receptacle for the dc power supply.
An 8-pin modular keyed jack for 4-wire/2-wire leased lines.
An 8-pin modular keyed jack for dial (PSTN) lines.
A 4-pin modular jack for the Network Management System (NMS) connection.
A 25-pin DB-25-S receptacle for the DTE interface.
Connecting Model 3910 Modems with Supplied Cables
Figure 1 shows how Model 3910 modems are connected to certain TELCO jack types using the appropriate
cables.
8-POSITION,
8-CONDUCTOR
LEASED-LINE
OPERATION
DTE 2
LEASED DIAL
PLUG FOR
CONNECTOR
NETWORK
FOR DATA
TERMINAL
EQUIPMENT
OPERATION
6-POSITION,
4-CONDUCTOR
PLUG FOR
PERMISSIVE
DIAL NETWORK
OPERATION
NOTE: DTE 2, 3, AND 4 ARE
FOR FUTURE OPTIONS
Figure 1. Model 3910 Rear Panel and Power Supply
DTE 3 DTE 4
DTE 1 NMS PWR
DB-25-P
SUB-MINIATURE,
4-CONDUCTOR
PLUG FOR
NETWORK
MANAGEMENT
OPERATION
POWER
SUPPLY
8
ON OFF