Datacom Systems D56 - Manual (Page 9)

9
5. INTERFACE SIGNALS
5.1 DTE Port Interface
Pin Signal In/Out
1 Frame Ground
2 Transmit Data IN
3 Receive Data OUT
4 Request to Send IN
5 Clear to Send OUT
6 Data Set Ready OUT
7 Signal Ground
8 Data Carrier Detect OUT
20 Data Terminal Ready IN