RAD Data comm RSD-20 operation manual Ordering, Indicators, Power, Physical, Environment

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INTRODUCTION

RSD-20 OPERATOR'S MANUAL

Indicators

DATA: Display data broadcast from main channel to sub-channels

ACTIVITY: 4 LEDs indicate which sub-channel has gained access to main channel

DISABLE: 4 LEDs indicate if sub-channel has been disabled automatically

ON: RSD power is on

Power

115/230 VAC switchable;

10%; 47-63 Hz; 10 W

Physical

Height: 44 mm / 1.7 in (1U)

Width: 431 mm / 17.0 in

Depth: 208 mm / 8.2 in

Weight: 2 kg / 4.4 lb

Environment

 

Temperature:

0-50oC/32-122oF

Humidity:

Up to 90%, non-condensing

1.4ORDERING

RSD-20/+/*/#

Digital Sharing Device

+Specify:

64 for 64/48 kbps (selectable)

56 for 56 kbps

*Specify interface:

V.35 for V.35 interface

X.21 for X.21 interface

1.3

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Contents RSD-20 DUUDQW\ 6DIHW\DUQLQJV HFODUDWLRQRI&RQIRUPLW\ Table of Contents Functional Description IntroductionGeneral Specifications Indicators PowerOrdering PhysicalInstallation Physical InstallationElectrical Installation AC PowerRear Panel Internal Switches and Strap SelectionRear Panel Installation Installation System Synchronization and Clock Distribution RSD-20/V.35Synchronization on Main Channel Modem Clock Synchronization on Main Channel Modem’s ClockSynchronization on RSD-20 Internal Clock Synchronization on Internal ClockRSD-20 Synchronization on Sub-channelRSD-20/X.21 External Clock for more than one Sub-channelMain channel is DTE attached to a modem Main and all sub-channels are DCE attached to DTEsMain channel is DCE and sub-channels are mixed DTE and DCE Front Panel Controls and IndicatorsOperation Operating Procedure Power Turn OnPower Turn Off OperationFault Isolation Procedure Power SupplyOperational Field Strapping Changes RSD MalfunctionContention SUB-CHANNEL DisableTheory of Operation and Applications IntroductionControl Signals Main Channel Control SignalsSub-channel Control Signals RSD-20/V.35RSD-20/X.21 Theory of Operation and Applications RSD-20 Operators Manual Theory of Operation and Applications Applications RSD-20 Operating ModesTable A.1 X21 Interface Signal Description Appendix aTable B.1 Interface Signal Description Appendix B