Appendix

DB25S Connector with V.35 Interface

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25 24 23 22 21 20 19 18 17 16 15 14

Figure B-3. Connector

DESCRIPTION

The DB25 connector also ties the MT56DSU-S to a DTE with a V.35 interface. When a V.35 interface device is connected to a MT56DSU-S, the internal shunt has to be moved to the V.35 position. The V.35 interface for the DB25 connector has the following pinout configuration.

PIN IDENTIFICATION

Pin Description

1Chassis Ground

7Signal Ground

4Request To Send

5Clear To Send

6Data Set Ready

8Carrier Detect

20Data Terminal Ready

2Transmit Data (A)

12Transmit Data (B)

3Receive Data (A)

22Receive Data (B)

15Transmit Clock (A)

21Transmit Clock (B)

17Receive Clock (A)

18Receive Clock (B)

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Multi-Tech Systems MT56DSU-S manual DB25S Connector with V.35 Interface, Pin Description