Multi-Tech Systems MT56DSU-S - Manual (Page 33)

33
Appendix
DB25S Connector with V.35 Interface
13 12 11 10 9 8 7 6 5 4 3 2 1
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
1 Chassis Ground
7 Signal Ground
4 Request To Send
5 Clear To Send
6 Data Set Ready
8 Carrier Detect
20 Data Terminal Ready
2 Transmit Data (A)
12 Transmit Data (B)
3 Receive Data (A)
22 Receive Data (B)
15 Transmit Clock (A)
21 Transmit Clock (B)
17 Receive Clock (A)
18 Receive Clock (B)