Paradyne 727 manual DSU or Internal Network Loopback, Send V.54 Up/Down Sequences

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Testing

DSU or Internal Network Loopback

DSU loopback is an internal loopback that is located as closely as possible to the customer interface serving the DTE.

"Procedure

To run a DSU loopback:

1.Position the cursor at the Start command next to DSU Loopback on the Network Tests screen.

2.Press Enter.

3.The Start command is changed to Stop. If you want to manually stop the test, verify that the cursor is positioned at the Stop command.

4.Press Enter. The duration of the test is displayed.

DTE Port

DSU

CSU

Aggregate

DTE

Interface

DDS

Network

Port

DSU Loopback

496-15160

Send V.54 Up/Down Sequences

The local DSU can send an ITU-T V.54 Up or Down sequence to request the activation or termination of a DSU (digital) loopback of a remote unit. This is the same as the DSU Loopback shown above except the test is activated remotely.

The DSU can send:

￿In-band V.54 Up (activation) code to request a Remote DSU Loopback (V.54 Loop 2) at the remote DSU or

￿In-band V.54 Down (deactivation) code to request the termination of a Remote DSU Loopback (V.54 Loop 2) at the remote DSU

"Procedure

To start or stop a remote DSU loopback:

1.Position the cursor at the Send command next to Send V.54 Up or Send V.54 Down on the Network Tests screen.

2.Press Enter.

Sending appears in the Status column followed (after 3 seconds) by Command Complete at the bottom of the screen.

Refer to Running Network Tests for an example of the Network Tests screen.

7510-A2-GB20-00

March 1997

5-5

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Contents Area Code Change Model 7510 DSU Copyright  1997 Paradyne Corporation All rights reserved Contents Monitoring the DSU Technical Specifications Glossary Index Document Summary About This GuideDocument Purpose and Intended Audience Product-Related Documents Model 7510 DSU Startup InstructionsModel 7510 DSU Features About the DSUFrame Typical DSU ConfigurationsRouter Router Relay NetworkModem User InterfacesRear Panel Interfaces TerminalUsing the Asynchronous Terminal Interface Connecting to the Terminal PortMain Menu Initiating an ATI SessionSelect What Affects Screen Displays Status Test Configuration Control Load FromScreen Format Types Use the screen formatScreen Work Areas Data Port OptionsPress Navigating the ScreensKeyboard Keys Screen Function Keys For the screen Select Press Return to FunctionNetwork Tests Switching to the Screen Function Key AreaExample Ending an ATI Session Main Menu → Control → Device Name Customizing the DSUIdentifying the Device and System Device NameSaving Configuration Options If you select ThenAccessing and Displaying Configuration Options Configuring the DSUConfiguration Option Areas Configuration Option Area Configuration Option SetMonitoring the DSU What to MonitorSystem and Test Status Health and Status SELF-TEST Results Viewing System and Test StatusMain Menu → Status → System and Test Status Health and Status HhhmmssSelf-Test Results Self-Test Results Messages What Message Indicates What To DoTest Status Messages Test Status Messages MeaningViewing Network Interface Status Main Menu → Status → Network Interface StatusViewing Network Performance Statistics Network Performance StatisticsMain Menu → Status → Display LEDs Alarm Test DM OOS OOF NS TXD RXD RTS CTS DTRMonitoring the LEDs Display Leds System NetworkAlarm System LEDsNS ± No Signal DM ± Data ModeOOS ± Out of Service Network LEDsPort LEDs Main Menu → Test TestingAccessing the Test Menu TestDevice Messages Loopback Type Initiated By Network Interface Options , Table A-2Running Network Tests Main Menu → Test → Network TestsCSU or External Network Loopback DSU or Internal Network Loopback Send V.54 Up/Down SequencesTest Pattern for the Network Data Port Tests Running Data Port TestsMain Menu → Test → Data Port Tests Local Loopback Test Pattern for the DTERunning the Lamp Test Main Menu → Test → Lamp TestEnding an Active Test Responding to Device Messages Messages and TroubleshootingMessages and Troubleshooting Device Messages 1 What Message Indicates What To DoDevice Messages 2 What Message Indicates What To Do Troubleshooting Troubleshooting 1 Symptom Possible Cause SolutionsMain Menu → Control → Reset Device Resetting the DSUTroubleshooting 2 Symptom Possible Cause Solutions Displaying DSU Identity InformationOverview Configuration Option TablesSelect To Access To Configure Status Load Edit/Display TestSystem Options Menu Operating ModeLads Timing Possible Settings Internal, External, Receive Table A-1. System Options 1Lads Line Rate Kbps Test TimeoutTable A-1. System Options 2 Test Duration minNetwork-initiated DSU Loopback 64K CC Network Interface Options MenuTable A-2. Network Interface Options Data Scrambling 64K CCInvert Transmit Clock Data Port Options MenuTable A-3. Data Port Options 1 Bilateral LoopbackRlsd Control Table A-3. Data Port Options 2Carrier Control by RTS Table A-3. Data Port Options 3 Inactivity TimeoutTerminal Port Options Table A-4. Terminal Port Options 1Table A-4. Terminal Port Options 2 Disconnect TimeminutesWorksheets Configuration WorksheetsConfiguration Option Settings Network Interface Cables and Pin Assignments Terminal Port EIA-232 Connector Signal Direction Pin #Direction Pin Socket Connector User Data Port ConnectorSignal Standard EIA-232-D Crossover Cable PinRJ48S DDS Network Interface Cable Functions Circuit Pin # LAN Adapter Converter and CableModular RJ48S DDS Network Interface Cable Cable Plug to Modular Jack LAN AdapterTechnical Specifications Table D-1. Model 7510 DSU Technical Specifications 1Network Compatibility Table D-1. Model 7510 DSU Technical Specifications 2Network Interface DTE Data Port InterfaceGlossary Excessive BPV Factory defaultsEIA-232 Frame relayNode ResetMultiplexing Non-latchingIndex NumbersIN-2 IN-3

727 specifications

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