ADTRAN ISU 128 - Manual (Page 131)

Appendix E: Connector Pinouts
116 ISU 128 User Manual 61202.029L2-1
Table E-B
RS-530 Interface
Pin Name I/O Description
1 Shield I/O Shield for cable
2 TD-A I Transmitted Data
3 RD-A O Received Data
4 RTS-A I Request to Send
5 CTS-A O Clear To Send
6 DSR-A O Data Set Ready
7 SG I/O Signal Ground
8 CD-A O Carrier Detect
9 RC-B O Receive Clock (return)
10 CD-B O Carrier Detect (return)
11 ETC-B I External Transmit Clock (return)
12 TC-B O Transmit Clock (return)
13 CTS-B O Clear To Send (return)
14 TD-B I Transmit Data (return)
15 TC-A O Transmit Clock
16 RD-B O Receive Data (return)
17 RC-A O Receive Clock
18 NC N/A No Connection
19 RTS-B I Request To Send (return)
20 DTR-A I Data Terminal Ready
21 NC N/A No Connection
22 DSR-B O Data Set Ready (return)
23 DTR-B I Data Terminal Ready (return)
24 ETC-A I External Transmit Clock
25 NC N/A No Connection
I= Input, O= Output, N/A= Not Applicable