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ManualsBrandsRAD Data comm ManualsCable BoxRAD Data Communications Cable Box RSD-20

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