RSD-20/X.21 | RAD Data comm specs

RSD-20 OPERATOR'S MANUAL

THEORY OF OPERATION AND APPLICATIONS

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.

4.2

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RAD Data comm operation manual RSD-20/X.21

Contents

RSD-20 DUUDQW\ 6DIHW\DUQLQJV HFODUDWLRQRI&RQIRUPLW\ Table of Contents Functional Description IntroductionGeneral Specifications Physical IndicatorsPower Ordering AC Power InstallationPhysical Installation Electrical Installation Rear Panel Internal Switches and Strap SelectionRear Panel Installation Installation Synchronization on Main Channel Modem’s Clock System Synchronization and Clock DistributionRSD-20/V.35 Synchronization on Main Channel Modem Clock Synchronization on Internal Clock Synchronization on RSD-20 Internal Clock Synchronization on Sub-channel RSD-20 Main and all sub-channels are DCE attached to DTEs RSD-20/X.21External Clock for more than one Sub-channel Main channel is DTE attached to a modem Main channel is DCE and sub-channels are mixed DTE and DCE Front Panel Controls and IndicatorsOperation Operation Operating ProcedurePower Turn On Power Turn Off RSD Malfunction Fault Isolation ProcedurePower Supply Operational Field Strapping Changes Introduction ContentionSUB-CHANNEL Disable Theory of Operation and Applications RSD-20/V.35 Control SignalsMain Channel Control Signals Sub-channel Control Signals RSD-20/X.21 Theory of Operation and Applications RSD-20 Operators Manual Theory of Operation and Applications RSD-20 Operating Modes Applications Appendix a Table A.1 X21 Interface Signal Description Appendix B Table B.1 Interface Signal Description