Patton electronic 2500 Series - Manual (Page 20)

(APPENDIX D - Continued)
DB-25 CONNECTOR, TERMINAL INTERFACE
Pin # Signal
1 Frame Ground
2 TD
3 RD
4 RTS
5 CTS
6 DSR
7 SGND (Signal Ground)
8 CD
15 TC
17 RC
18 LL (Local Loop)
20 DTR
21 RL (Remote Loop)
24 XTC
25 TM (Test Mode)
CONTROL PORT INTERFACE
8 Position modular connector compliant with EIA-561.
Pin # Signal
4 Signal Ground
5 RD (Output)
6 TD (Input)
APPENDIX E
TRANSMITTER CLOCK SOURCE DURING TEST LOOPS
RC = Received Clock
37 38
Analog Originating Receiving
Clock Mode Normal Loop Remote Loop Remote Loop
Internal INT INT INT RC
External EXT INT EXT EXT
Network RC INT RC RC