RAD Data comm RSD-20 Cable Box User Manual


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APPENDIX A
Table A.1
X21 Interface Signal Description
X.21 SIGNAL NAME PIN
SHIELD 1
G GROUND 8
T TRANSMIT 2
9
R RECEIVE 4
11
CCONTROL3
10
I INDICATION 5
12
S SIGNAL TIMING 6
13
- EXTERNAL CLOCK 7
14
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