ADC H4TU-C-319 List 1 Line Unit A5LB Test Procedure, A5LB Addressable Repeater Loopback Commands

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LTPH-UM-1031-03, Issue 3

Testing

 

 

A5LB Test Procedure

Using the codes listed in Table 18, a network tester can activate NLOC or NREM loopbacks (or SMJK, if enabled). A tester at the customer premises can activate CLOC or CREM loopbacks.

Table 18. A5LB Addressable Repeater Loopback Commands

Name

Binary Code (a) (Hexadecimal Equivalent)

Description

ARMING or NI LPBK (inband)

11000-11000 ...

Arming code

 

 

 

ARMING or NI LPBK (ESF Data Link)

1111-1111-0100-1000 (FF48)

Arming code

 

 

 

IR LPDN or DISARM (inband)

11100-11100 ...

Disarming code

 

 

 

IR LPDN or DISARM (ESF Data Link)

1111-1111-0010-0100 (FF24)

Disarming code

 

 

 

IOR LPBK (NLOC or CREM)

1101-0011-1101-0011 (D3D3)

H4TU-C loopup

230-232 bit errors

 

 

229-231 bit errors (b)

 

 

ILR-1 LPBK

1100-0111-0100-0001 (C741)

Doubler-1 loopup

(NDU1 and CDU1 10 bit errors)

 

 

 

 

 

ILR-20 LPBK

1100-0111-0101-0100 (C754)

Doubler-2 loopup

(NDU2 and CDU2 200 bit errors)

 

 

 

 

 

ILR-2 LPBK

1100-0111-0100-0010 (C742)

H4TU-R loopup

(NREM and CLOC 20 bit errors)

 

 

ILR-2 LPBK (NREM or CLOC) 20 bit errors (c)

NREM—DSX-1 signal is looped back to 1100-0111-0100-0010 (C742) the network at the H4TU-R.

CLOC—DS1 signal from customer is looped back to the customer at the H4TU-R.

IR LPDN

1001-0011-1001-0011 (9393)

Loopdown (H4TU-C or H4TU-R)

IR QUERY LPBK

1101-0101-1101-0101

(D5D5)

Query loopback

 

 

 

 

IR ALTERNATE QUERY LPBK

1101-0101-1110-1010

(D5EA)

Alternate query loopback

 

 

 

 

TIME-OUT OVERRIDE

1101-0101-1101-0110

(D5D6)

Loopback time-out override

 

 

 

 

IOR POWER DOWN (H4TU-C) (d)

0110-0111-0110-0111

(6767)

Removes HDSL4 line power

(a)The leftmost bit arrives first in all sequences. The detection algorithm functions reliably with a random 10-3BER on the facility. The entire arming and loopback sequence can also be initiated at the remote H4TU-R location.

(b)The H4TU-R identifies CREM (and the H4TU-C identifies NLOC) with 231 bit errors, including the frame bits. When framed data is being sent in the Auto framing mode, the number of the 231 bit errors detected by the test set varies from 229 to 231, depending on whether or not the test set counts frame errors as bit errors, and on the number of frame bits contained in the block of 231 error bits. The H4TU-R and H4TU-C generate this bit pattern in a series of discontinuous bursts containing 20-bit errors each, including frame bits. Those test sets that do not count frame error bits as data bit errors will indicate fewer bits than the H4TU-R and H4TU-C transmit for a CI and NI loopback.

(c)The H4TU-R is assigned the ILR-2 loopback code. It responds with 20 bit errors (excluding the frame bits).

(d)The IOR Power Down code must remain present for the duration of the power down mode. When this code is removed, the system returns to its normal unlooped and unarmed state.

H4TU-C-319 List 1

September 12, 2003

53

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Contents H4TU-C-319 List 1 Line Unit HDSL4Date Revisions Made Issue2001 Initial release March 15 September 12Inspecting Shipment Using this ManualInspecting Shipment Table of Contents Appendix B Functional Operation List of Figures Config MenuList of Tables Navigational Keys for the Maintenance Terminal ScreensOverview FeaturesApplications H4TU-C-319 List 1 Front Panel Front PanelFront-Panel Description Front-Panel Feature FunctionBRG LineMessage Full Name Description Front-Panel Display MessagesLoopback Messages Diagnostic MessagesSystem Information Messages a FRM Frame SF, ESF, Unfr Marg Margin Current margin threshold setting measured in dBCode Line Code AMI, B8ZS Substitution B8ZSInstalling the H4TU-C-319 List 1 into a Shelf InstallationVerification without a Downstream Device VerificationVerification with a Downstream Device Setting Options through Mode and SEL Using the Mode and SEL PushbuttonsProvisioning Displaying System Parameter Settings Resetting to Factory DefaultDisabling an Alarm Loopback ModesConnecting to a Maintenance Terminal Using a Maintenance TerminalNavigational Keys for the Maintenance Terminal Screens Logon ScreenMenu Functions Press this keyPress this key To access this menu Menu Functions Provisioning Tasks Setting Date and TimeInventory Screen Setting Circuit ID NumbersConfig Menu Configuring the SystemConfig Menu Standard Options defaults shown 60 min H4TU-C-319 List 1 Standard Config Menu Options38 dB AutoADC Config Menu Screen Selection Description Options H4TU-C-319 List 1 ADC Config Menu OptionsDIS DEFNone HDSL4 BER HberLpbk ALM ENAParameter DS1/DSX-1 24-Hour PM ThresholdResetting to Factory Defaults Config Menu Master Clear Clearing the History, Alarm, and Event Log ScreensMonitoring System Activity and Performance Using the Monitor Screen to View System ActivitySystem Overview Field Description Monitor Screen DescriptionsMAL LPF InslPRM Performance History at the DS1 Interface Using the Performance Screens to View Performance DataH4TU-C DS1 25-Hour Performance History H4TU-R DS1 Current Statistics Acronym Description Acronyms Used on the DS1 Performance History ScreensH4TU-C Hdsl Loop 1/Loop 2 31-Day Performance History Performance History at the HDSL4 InterfaceH4TU-C Hdsl Loop 1/Loop 2 25-Hour Performance History SES Acronyms Used on the HDSL4 Performance History ScreensUAS LoswsAlarm History at the DS1 Interface Using the Performance Screens to View Alarm DataH4TU-R DS1 Alarms on this Screen Alarm Front-PanelDescription H4TU-C DS1 Alarms onRAI Rrai PRM-NE PrmnHDSL4 Alarms at the H4TU-C only Alarm History at the HDSL4 InterfaceSystem Event Log Using the Event LOG to Track System EventsEvent Log Messages Event Log Entry Messages ListPRM-FE Report Menu Full Report Using the Report MenuType Contains the following information Report TypesSystem Alarms TestingFront-Panel System Alarms Front-Panel Alarm Description To Inhibit Message aPrmn Front-Panel Alarm DescriptionRetiring System Alarms Alarm Option for DLC FeedRemote LOS and AIS Response OCT55 Test Pattern with AMI Line CodeLoopback Summary Loopback OperationSpecial Loopback Commands Generic Loopback CommandsManual Loopback Session Setting the Loopback Time-Out Option LbtoGeneral Troubleshooting Tips Loopback Test ProceduresLoopback Modes Summary of HDSL4 Loopback and Activation Codes Gnlb Test ProceduresLoopback Code Description Test Set Craft Port MODE/SELA3LB Addressable Repeater Loopback Commands A3LB Test ProcedureName A5LB Addressable Repeater Loopback Commands A5LB Test ProcedureTesting LTPH-UM-1031-03, Issue Bert Signal Generator Testing with H4TU-C Bert GeneratorBert Signal Pattern Option DescriptionH4TU-R Bert Generator Screen Testing with H4TU-R Bert GeneratorHDSL4 Appendix a SpecificationsSystem One-way DS1 Delay 700 µs Wander LoopedWideband Jitter Looped UI maximum Narrowband Jitter Looped Maximum Power Dissipation Power ConsumptionH4TU-C Power Parameters Maximum Current Drain HDSL4 Reach ChartLoop ATTENUATION, Insertion LOSS, and Reach 196 KHz dB/kftNetwork Management Control Bus Fuse AlarmCraft Port System Alarm Output PinSpectrum Issues Ground Fault DetectionAppendix B Functional Operation TimingAppendix C Compatibility Sales Assistance Appendix D Product SupportSystems Integration Online Technical Support Online Technical PublicationsAppendix E Abbreviations Latt LaisLbpv LbtoLTPH-UM-1031-03, Issue FCC Class a Compliance Limited Warranty Certification and WarrantyFor Technical Assistance World Headquarters
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