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PATTON MODEL 2021 INTERFACE STANDARDS
Model 2021 RS-232 Interface
Transmit Clock -15
Receive Clock -17
Data Term. Ready (DTR) - 20
External Transmit Clock -24
Test Mode (TM) -25
Model 2021 X.21 Interface
Transmit - B - 9
TRANSMIT B
Control - B -10
CONTROL B 10
Receive - B -11
RECEIVE B 11
Indication - B -12
INDICATION B 12
Signal Timing -13
SIGNAL TIMING 12
14
15
APPENDIX B
1- (FG) Frame Ground
14
2- (TD) Transmit Data
3- (RD) Receive Data
16
4- (RTS) Request to Send
5- (CTS) Clear to Send
18
6- (DSR) Data Set Ready
19
7- (SG) Signal Ground
8- (DCD) Data Carrier Detect
21
9- (DCV) +DC Test Voltage
22
23
1 FRAME GROUND
1- Frame Ground
9
2 TRANSMITTED - A
2- Transmit - A
3 CONTROL - A
3- Control - A
4 RECEIVE - A
4- Receive - A
5 INDICATION - A
5- Indication - A
6 SIGNAL TIMING - A
6- Signal Timing - A
14
7
7
15
8 SIGNAL GROUND
8- Signal Ground
6
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