Patton electronics 2190, User Manual, Page: 14 / 14

APPENDIX C
PATTON ELECTRONICS MODEL 2190
RS-232 (ITU-T V.24/V.28) PIN ASSIGNMENTS
PIN V.24 FUNCTIONS SIGNALS DIRECTION
1 Frame Ground FG
2 103 Transmitted Data TxD Input
3 104 Received Data RxD Output
4 105 Request to Send RTS Input
5 106 Clear to Send CTS Output
6 107 Data Set Ready DSR Output
7 102 Signal Ground SG
8 109 Carrier Detect CD Output
20 108.2 Data Terminal Ready DTR Input
22 125 Ring Indicator RI Output
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