RAD Data comm RSD-20

4.4.2.2 RSD-20/X.21

CONTROL/INDICATION

If the “C/I to Sub-channel”jumper is in the “MAIN CHANNEL”state, the C/I to sub-channel

follows the main C/I (unless the sub-channel is disabled, then the C/I is OFF). If the “C/I to

sub-channel is in the ”ON" state, all of the sub-channels’C/O are “ON”irrespective of the main

channel C/I.

RSD-20OPERATOR'S MANUAL THEORYOF OPERATION AND APPLICATIONS

4.2

Contents

Main RSD-20 High Speed Digital Sharing Device Installation and Operation Manual Notice :DUUDQW\ /LPLWDWLRQRI:DUUDQW\ ([FOXVLYH5HPHGLHV 5HJXODWRU\,QIRUPDWLRQ )&&8VHU,QIRUPDWLRQ Page 'HFODUDWLRQRI&RQIRUPLW\ TABLE OF CONTENTS INTRODUCTION 1.1 1.2 1.3 1.4 INSTALLATION 2.1 2.2 2.3 2.4 2.4.2 Rear Panel 2.4.3 Internal Switches and Strap Selection Page Page 2.5 2.5.1 RSD-20/V.35 TX. CLK RSD-20 DCE INT. CK DCE EXT. CK DTE RSD-20 RSD-20 2.5.2 RSD-20/X.21 Page OPERATION 3.1 RAD 3.2 3.3 3.3.1 Power Turn On 3.3.2 Operation 3.3.3 Power Turn Off 3.4 3.5 3.5.1 Power Supply 3.5.2 RSD Malfunction THEORY OF OPERATION AND APPLICATIONS 4.1 4.2 4.3 4.3.1 Manual Disable 4.4 4.4.1 Main Channel Control Signals 4.4.2 Sub-channel Control Signals Page Page Page Page 4.5 APPENDIX A Table A.1 X21 Interface Signal Description APPENDIX B Table B.1 V.35 Interface Signal Description