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
25