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

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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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Contents Multi-Function LD Cards FCC Statements MULTI-FUNCTION LD Card NOM Statements Contents Specifications Indicators DiagnosticsConnectors Weight PowerTemperature FuseFeatures IntroductionOverview Introduction Setting the Switches on the Main Module Main-module switchesOn and OFF settings of the DIP switches Switch S1 SummaryS1 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 LengthSwitch S3 Summary S3-1 and S3-2 Input ImpedanceS3-5 DTE RS-232 Initiation of Local Loopback Test Recommended Impedance SettingsS3-4 Mode Selection S3-6 DTE RS-232 Initiation of Remote Loopback TestSetting the Jumpers on the Interface Module S3-7 and S3-8 Antistream ControlFour interface modules Jumper locations Summary of Interface-Module Jumper Functions Line Interface Line Shield Connection to Frame Ground JB2Serial Interface Signal Ground and Frame Ground JB4 JB5Installation MicroRacks An OverviewMicroRacks’ 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 codesTwo-pair star wiring for host and slave Cards Multipoint ApplicationsOperation and Diagnostics Status LEDsRTS 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 RecommendationsMULTI-FUNCTION LD Card Copyright 1995. Black Box Corporation. All rights reserved