Black Box ME758C-RJ11 Multipoint Applications, Two-pair star wiring for host and slave Cards

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MULTI-FUNCTION LD CARD

4.6 Multipoint Applications

The Multi-Function LD Card supports multipoint applications using equipment arranged in a star topology. Maximum distance between the units will vary based on the number of drops, data rate, wire gauge, etc. Call your supplier’s technical support for distance estimates more specific to your application. Figures 4-3 and 4-4 below show how to wire two-pair and one-pair cables respectively for a Multi-Function LD Card star network.

HOST	FIRST SLAVE SECOND SLAVE

XMTRCV

RCV

XMT RCV

RCV

RCV XMT

XMT

RCV XMT

XMT

Figure 4-3. Two-pair star wiring for host and slave Cards.

HOST	FIRST SLAVE SECOND SLAVE

XMTXMT

XMT

XMTXMT

XMT

Figure 4-4. Single-pair star wiring for host and slave Cards.

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Contents Multi-Function LD Cards FCC Statements MULTI-FUNCTION LD Card NOM Statements Contents Specifications Connectors IndicatorsDiagnostics Temperature PowerWeight FuseOverview FeaturesIntroduction Introduction Main-module switches Setting the Switches on the Main ModuleSwitch S1 Summary On and OFF settings of the DIP switchesS1 Position 7 Protocol S1 Positions 1 through 4 Data-Rate SettingS1 Positions 5 and 6 Clock Source S1 Position 8 Carrier-Control Method Switch S2 SummaryS2 Position 2 2-Wire vs -Wire Operation S2 Positions 4 and 5 RTS/CTS Delay S2 Position 3 V.52 and V.54 Diagnostic TestingS2-6 Signaling-Rate Range S2-7 and S2-8 Word LengthS3-1 and S3-2 Input Impedance Switch S3 SummaryS3-4 Mode Selection Recommended Impedance SettingsS3-5 DTE RS-232 Initiation of Local Loopback Test S3-6 DTE RS-232 Initiation of Remote Loopback TestS3-7 and S3-8 Antistream Control Setting the Jumpers on the Interface ModuleFour interface modules Jumper locations Line Interface Line Shield Connection to Frame Ground JB2 Summary of Interface-Module Jumper FunctionsJB5 Serial Interface Signal Ground and Frame Ground JB4MicroRacks An Overview InstallationMicroRacks’ Power Supply Installing the Multi-Function LD Card in the MicroRack Pinout of the 10-Pin RJ Interface RS-232 Serial Cables and ConnectorsPinout of the RS-232 Interface Modem-to-Modem Line Cables and Connectors AT&T standard modular color codes Line-Cable PinoutsMultipoint Applications Two-pair star wiring for host and slave CardsStatus LEDs Operation and DiagnosticsRTS and CD Indicators Diagnostic Testing Using the Error LED Power-Up V.54 and V.52 Diagnostic Tests Remote Digital Loopback RDL Using the V.52 Bert Test Independently Shipping and Packaging TroubleshootingCalling Your Supplier Appendix Cable Recommendations Wire Gauge Capacitance ResistanceMULTI-FUNCTION LD Card Copyright 1995. Black Box Corporation. All rights reserved