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APPENDIX B
INTERFACE PIN ASSIGNMENT
EIA-530 Interface Pin Description
(DB-25 Female Connector)
(DCE Configuration)
Pin # Signal
1 FG (Frame Ground)
2 TD (Transmit Data)
3 RD (Receive Data)
4 RTS (Request to Send)
5 CTS (Clear to Send)
6 DSR (Data Set Ready)
7 SGND (Signal Ground)
8 CD (Carrier Detect)
9 RC/ (Receive Timing-B)
10 CD/ (Carrier Detect-B)
11 XTC/ (External Transmit Clock)
12 TC/ (Transmit Clock-B)
13 CTS/ (Clear to Send)
14 TD/ (Transmit Data-B)
15 TC (Transmit Clock-A)
16 RD (Receive Data)
17 RC (Receive Timing)
18 LLB (Local Line Loop)
19 RTS/ (Request to Send)
20 DTR (Data Terminal Ready)
21 DL (Remote Digital Loop)
22 DSR/ (Data Set Ready)
23 DTR/ (Data Terminal Ready)
24 XTC (External Transmit Clock)
25 TM (Test Mode)