Black Box ME758C-RJ11, ME758C-RJ45, ME759C-RJ45, May-95 manual Introduction, Overview, Features

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MULTI-FUNCTION LD CARD

2. Introduction

2.1 Overview

The Multi-Function LD Card is a short-range modem on a dual rack card (it has a main [front] module and an interface [rear] module). The Card operates across two wires (half-duplex) or four wires (full- or half-duplex), communicating synchronously or asynchronously, up to a maximum range of 20 miles (32.2 km). You can set the Card to any of twelve data rates from 1.2 to 57.6 kbps. Local and remote modems on Multi-Function LD Cards always communicate with each other synchronously. When connected to an asynchronous RS-232 device, the Card performs synchronous↔asynchronous conversion.

The Card has several features that enhance its overall performance, including automatic equalization, automatic gain control, an antistreaming timer, transformer isolation, and Silicon Avalanche Diode surge protection. The Card also has strong diagnostics: It features V.52-compliant bit-error-rate (BERT) pattern tests and two V.54 test modes. With the Card’s 11 easy-to-read front-panel LEDs, you can easily monitor the status of data transmission and diagnostic testing.

The Multi-Function LD Card is fabricated using the latest surface-mount technology, so you get high-quality short-range-modem performance on a convenient rack card. The Card is available with either DB25 or 10-pin RJ-style serial-interface connectors, and either RJ-11 or RJ-45 line-interface connectors, on its interface (rear) module. It fills one function-card slot in our MicroRacks (RM202, RM204, RM208, or RM216).

2.2 Features

•Convenient rack-card design

•Synchronous or asynchronous communication

•Data rates up to 57.6 kbps, distances up to 20 miles (32.2 km)

•2-wire/half-duplex or 4-wire/full- or half-duplex operation

•Point-to-point or multipoint operation

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Contents Multi-Function LD Cards FCC Statements MULTI-FUNCTION LD Card NOM Statements Contents Specifications Indicators DiagnosticsConnectors Temperature PowerWeight FuseFeatures IntroductionOverview Introduction Main-module switches Setting the Switches on the Main ModuleSwitch S1 Summary On and OFF settings of the DIP switchesS1 Positions 1 through 4 Data-Rate Setting S1 Positions 5 and 6 Clock SourceS1 Position 7 Protocol Switch S2 Summary S2 Position 2 2-Wire vs -Wire OperationS1 Position 8 Carrier-Control Method 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 RS-232 Serial Cables and Connectors Pinout of the RS-232 InterfacePinout of the 10-Pin RJ 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 Troubleshooting Calling Your SupplierShipping and Packaging Appendix Cable Recommendations Wire Gauge Capacitance ResistanceMULTI-FUNCTION LD Card Copyright 1995. Black Box Corporation. All rights reserved
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