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Black Box ME758C-RJ45, ME759C-RJ45, May-95, ME759C-RJ11 manual Operation and Diagnostics, Status LEDs

Models: ME758C-RJ11 ME759C-RJ11 ME759C-RJ45 May-95 ME758C-RJ45

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CHAPTER 5: Operation and Diagnostics

5. Operation and Diagnostics

Once you have configured each Multi-Function LD Card and connected the cables, you are ready to operate the units. This chapter describes the Card’s LEDs, the power-up procedure, and diagnostic testing.

5.1 Status LEDs

The Multi-Function LD Card features 11 front-panel status LEDs (shown in Figure 5-1 below) that indicate the condition of the modem and the communication link.

	Power
	TD
	RD
	RTS
	CD
Test	Error
Remote	Analog
511/E	511

Figure 5-1. The Card’s front panel.

5.1.1THE TD AND RD INDICATORS

The TD and RD indicators (one red and one green LED for each signal) blink when data activity occurs: The red LEDs indicate a low RS-232 logic level, while the green LEDs indicate a high RS-232 logic level. Also, since RS- 232 devices idle in a low state, the red LED will be steadily lit if the connections are correct and the RS-232 device is in an idle state.

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Black Box ME758C-RJ45, ME759C-RJ45, May-95, ME759C-RJ11, ME758C-RJ11 manual Operation and Diagnostics, Status LEDs

Contents

Multi-Function LD Cards FCC Statements MULTI-FUNCTION LD Card NOM Statements Contents Specifications Indicators DiagnosticsConnectors Weight PowerTemperature Fuse Features IntroductionOverview Introduction Setting the Switches on the Main Module Main-module switches On and OFF settings of the DIP switches Switch S1 Summary S1 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 S2-6 Signaling-Rate Range S2 Position 3 V.52 and V.54 Diagnostic TestingS2 Positions 4 and 5 RTS/CTS Delay S2-7 and S2-8 Word Length Switch S3 Summary S3-1 and S3-2 Input Impedance S3-5 DTE RS-232 Initiation of Local Loopback Test Recommended Impedance SettingsS3-4 Mode Selection S3-6 DTE RS-232 Initiation of Remote Loopback Test Setting the Jumpers on the Interface Module S3-7 and S3-8 Antistream Control Four interface modules Jumper locations Summary of Interface-Module Jumper Functions Line Interface Line Shield Connection to Frame Ground JB2 Serial Interface Signal Ground and Frame Ground JB4 JB5 Installation MicroRacks An Overview MicroRacks’ 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 Line-Cable Pinouts AT&T standard modular color codes Two-pair star wiring for host and slave Cards Multipoint Applications Operation and Diagnostics Status LEDs RTS 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 Wire Gauge Capacitance Resistance Appendix Cable Recommendations MULTI-FUNCTION LD Card Copyright 1995. Black Box Corporation. All rights reserved