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DSU 5600 Interface Pinouts

DSU 5600 Interface Pinouts

Article ID: 1599

  DSU 5600 Interface Pinouts


DSU 5600 Interface Pinouts


The following charts give the pin assignments for the DSU 5600 connectors. They can also be found in the DSU 5600 User Manual, Chapter 2. Installation.

Network Connections

This interface consists of four leads paired to provide separate transmit and receive circuits. The four leads are provided on the eight position modular jack (RJ-48S) labeled TELCO on the rear panel of the DSU 5600.

Pin NumberFunctionSignal Direction
1Transmit Data (R)From Customer to Network Interface
2Transmit Data (T)From Customer to Network Interface
3-6Not Used
7Receive Data (T-1)From Network Interface to Customer
8Receive Data (R-1)From Network Interface to Customer

Pin Assignments for Primary EIA-232 Connector

The data terminal equipment is attached to the connector labeled PRIMARY EIA-232 at the rear of the DSU 5600. The maximum cable length recommended is 50 feet.

The EIA-232 connector works up to 56 kbps with a low capacitance cable or with the external transmit clock option selected. The primary DTE rate is configured from the front panel. The primary DTE can operate in asynchronous or synchronous modes.

To prevent possible radio frequency interference emissions, a shielded cable is required.

1AAProtective Ground (PG)
2BASend Data (SD)
3BBReceive Data (RD)
4CARequest to Send (RS)
5CBClear to Send (CS)
6CCData Set Ready (SR)
7ABSignal Ground (SG)
8CFReceived Line Signal Detector (CD)
9-Not Used
10-Not Used
11-14-Not Used
15DBTransmit Clock (STC)
16-Not Used
17DDReceive Clock (SCR)
19-24-Not Used

Version history
Revision #:
1 of 1
Last update:
‎02-28-2012 02:23 PM
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