ADC HDSL4, H4TU-C-319 List 1 Line Unit user manual Testing

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Testing

LTPH-UM-1031-03, Issue 3

 

 

To perform the A5LB test procedures:

1Send the inband Arming and NI LPBK code 11000 to the H4TU-C for at least 5 seconds.

2Monitor the output of the H4TU-C for the return of the pattern. Return of the pattern indicates one of the following:

The H4TU-R has looped up (if the SMJK Loopback option is enabled).

An external NID has looped up (if the SMJK Loopback option is disabled), and the H4TU-C and H4TU-R have been armed.

3Verify, if possible, that the H4TU-R Loopback LED is either flashing yellow at four times per second (indicating that the system is armed), or is a steady yellow (indicating that it is both armed and in SMJK loopback). The H4TU-C Status LED also flashes yellow when the system is armed.

If the Arming code is not returned after 5 seconds, the system may be armed, but there is no active loopback.

4Once armed, the H4TU-C can be looped back by sending Intelligent Office Repeater (IOR) LPBK activation code 1101-0011-1101-0011 (D3D3) for at least 5 seconds. You should observe the following activation response pattern in the order presented:

2 seconds of AIS (all ones pattern)

2 seconds of returning data pattern

231 logic errors (including the frame bit) occurring in the returned pattern comprising:

10 errors, if ILR-1 (Doubler 1) was sent

200 errors, if ILR-20 (Doubler 2) was sent

20 errors, if ILR-2 (H4TU-R) was sent

Normal looped data

This error pattern repeats every 20 seconds as long as the IOR loopback pattern is being sent. This also applies to ILR, Time-Out Override, and Query commands.

Some Intelligent Repeater (IR) test sets do not count frame errors as bit errors when the test pattern is framed and the H4TU-C-319 is set to the Auto framing mode. To improve compatibility with those test sets, the H4TU-C generates 231 (NLOC and CREM) ID bit errors. As a result, the H4TU-C may indicate one more or one less bit error, depending on the test set type and the number of frame bits contained in the block of errored bits. To avoid this uncertainty, ADC recommends sending unframed IR commands.

The H4TU-C is now in logic loopback if the IOR NLOC loopback command was sent. The Time-Out Override command or a Loopdown command can override the selection made for the loopback time-out (see “Setting the Loopback Time-Out Option (LBTO)” on page 48). If the Time-Out Override code

1101-0101-1101-0110 (D5D6) is received after activating a loopback, then the automatic timed expiration of the loopback is inhibited. If this Time-Out Override is sent, then the only way to loop the H4TU-C down is to do one of the following:

Issue the IR (Intelligent Repeater) LPDN (loopdown) code 1001-0011-1001-0011 (9393).

Issue the NI LPDN and Disarm inband code 11100 or the ESF-DL code (FF24).

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September 12, 2003

H4TU-C-319 List 1

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Contents HDSL4 H4TU-C-319 List 1 Line Unit2001 Initial release March 15 IssueDate Revisions Made September 12Using this Manual Inspecting ShipmentInspecting Shipment Table of Contents Appendix B Functional Operation Config Menu List of FiguresNavigational Keys for the Maintenance Terminal Screens List of TablesFeatures OverviewApplications Front Panel H4TU-C-319 List 1 Front PanelBRG Front-Panel Feature FunctionFront-Panel Description LineFront-Panel Display Messages Message Full Name DescriptionSystem Information Messages a Diagnostic MessagesLoopback Messages Code Line Code AMI, B8ZS Marg Margin Current margin threshold setting measured in dBFRM Frame SF, ESF, Unfr Substitution B8ZSInstallation Installing the H4TU-C-319 List 1 into a ShelfVerification with a Downstream Device VerificationVerification without a Downstream Device Provisioning Using the Mode and SEL PushbuttonsSetting Options through Mode and SEL Disabling an Alarm Resetting to Factory DefaultDisplaying System Parameter Settings Loopback ModesNavigational Keys for the Maintenance Terminal Screens Using a Maintenance TerminalConnecting to a Maintenance Terminal Logon ScreenPress this key Menu FunctionsPress this key To access this menu Menu Functions Setting Date and Time Provisioning TasksSetting Circuit ID Numbers Inventory ScreenConfiguring the System Config MenuConfig Menu Standard Options defaults shown 38 dB H4TU-C-319 List 1 Standard Config Menu Options60 min AutoDIS H4TU-C-319 List 1 ADC Config Menu OptionsADC Config Menu Screen Selection Description Options DEFLpbk HDSL4 BER HberNone ALM ENADS1/DSX-1 24-Hour PM Threshold ParameterResetting to Factory Defaults Clearing the History, Alarm, and Event Log Screens Config Menu Master ClearSystem Overview Using the Monitor Screen to View System ActivityMonitoring System Activity and Performance MAL Monitor Screen DescriptionsField Description PRM InslLPF Using the Performance Screens to View Performance Data Performance History at the DS1 InterfaceH4TU-C DS1 25-Hour Performance History H4TU-R DS1 Current Statistics Acronyms Used on the DS1 Performance History Screens Acronym DescriptionPerformance History at the HDSL4 Interface H4TU-C Hdsl Loop 1/Loop 2 31-Day Performance HistoryH4TU-C Hdsl Loop 1/Loop 2 25-Hour Performance History UAS Acronyms Used on the HDSL4 Performance History ScreensSES LoswsUsing the Performance Screens to View Alarm Data Alarm History at the DS1 InterfaceRAI Rrai Screen Alarm Front-PanelDescription H4TU-C DS1 Alarms onH4TU-R DS1 Alarms on this PRM-NE PrmnAlarm History at the HDSL4 Interface HDSL4 Alarms at the H4TU-C onlyUsing the Event LOG to Track System Events System Event LogPRM-FE Event Log Entry Messages ListEvent Log Messages Using the Report Menu Report Menu Full ReportReport Types Type Contains the following informationFront-Panel System Alarms TestingSystem Alarms Front-Panel Alarm Description To Inhibit Message aFront-Panel Alarm Description PrmnAlarm Option for DLC Feed Retiring System AlarmsOCT55 Test Pattern with AMI Line Code Remote LOS and AIS ResponseLoopback Operation Loopback SummaryGeneric Loopback Commands Special Loopback CommandsSetting the Loopback Time-Out Option Lbto Manual Loopback SessionLoopback Test Procedures General Troubleshooting TipsLoopback Modes Loopback Code Description Test Set Craft Port Gnlb Test ProceduresSummary of HDSL4 Loopback and Activation Codes MODE/SELName A3LB Test ProcedureA3LB Addressable Repeater Loopback Commands A5LB Test Procedure A5LB Addressable Repeater Loopback CommandsTesting LTPH-UM-1031-03, Issue Bert Signal Pattern Testing with H4TU-C Bert GeneratorBert Signal Generator Option DescriptionTesting with H4TU-R Bert Generator H4TU-R Bert Generator ScreenAppendix a Specifications HDSL4Wideband Jitter Looped UI maximum Narrowband Jitter Looped One-way DS1 Delay 700 µs Wander LoopedSystem H4TU-C Power Parameters Power ConsumptionMaximum Power Dissipation Loop ATTENUATION, Insertion LOSS, and Reach HDSL4 Reach ChartMaximum Current Drain 196 KHz dB/kftFuse Alarm Network Management Control BusSystem Alarm Output Pin Craft PortAppendix B Functional Operation Ground Fault DetectionSpectrum Issues TimingAppendix C Compatibility Systems Integration Appendix D Product SupportSales Assistance Online Technical Support Online Technical PublicationsAppendix E Abbreviations Lbpv LaisLatt LbtoLTPH-UM-1031-03, Issue Certification and Warranty FCC Class a Compliance Limited WarrantyWorld Headquarters For Technical Assistance