Rear Panel; Figure 3-4. Dsu Iii Tdm Rear View - ADTRAN DSU III TDM Manual

REAR PANEL

The DSU III TDM is equipped with four EIA-232 connectors labeled PORT
1 through PORT 4, used to connect to DTE equipment. The EIA-232 inter-
face is provided on four standard DB-25 connectors. Pin assignments for
the DTE and network connections are described in the appendix Pinouts
on page A-1. The DSU III TDM rear panel is shown in Figure 3-4 .
TELCO
MAIN BACKUP
CHAIN IN CHAIN OUT
CONTROL
Item
Port 1 - Port 4
Power switch
Main telco connector
Backup telco connector Connection to dial backup
Chain in
Chain out
115 VAC connection
61200063L1-20
PORT 1
PORT 2
Function
DTE connection
Used to turn power on or off
Connection to the dedicated circuit
Reserved for future use
Reserved for future use
Power cord connection

Figure 3-4. DSU III TDM Rear View

DSU III TDM User Manual
Chapter 3. Operation
PORT 3
PORT 4
115VAC 60HZ.15A
ON
OFF
3-13