User's manual g. Shdsl termination Unit Scorpio 1400 lcd




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5.3Maintenance


After the pressed the “Maintenance” item on the top of main menu, there are four items on this maintenance page, Alarm, Interface, SHDSL, and Test.


5.3.1 Maintenance-Alarm




  • Alarm severity class: Major, Minor, Warning or Clear

All TCA (Threshold Crossing Alert) are classified as WARNING. Table 5-1 and Table 5-2 show all SHDSL alarms and T1/E1 alarms, respectively. The Ds1/E1 alarm surveillance:

When “Loss of Signal Failure” is detected by either the STU-C, or the STU-R, a “loss of signal” alarm will be generated immediately, and the DS1/E1 signal will be replaced by the AIS signal towards the downstream locations and the RAI signal towards the upstream locations.

When the “loss of signal” of DS1/E1 status is occurred, an alarm will be generated.

When “Loss of Sync Defect (LOSW Defect)” or “Loss of Sync Word Failure (LOSW failure)” which defined in ITU-T G.991.2 section 9.2 is detected by either the STU-C or the STU-R, an “LOSW” alarm will be generated immediately.

When “LOSW” alarm occurs at the STU-C/STU-R locations, the STU-C/STU-R will replace the outgoing DS1/E1 signal towards the network/the customer by the AIS signal, respectively.

An SHDSL Loop Attenuation Defect or SNR Margin Defect alarm will be generated when the observed SHDSL Loop Attenuation Defect/ SNR Margin Defect is a level worse than the configured threshold.



Table 5 5 SHDSL Alarms Description

Alarm Type

Severity Class

Description

SHDSL_LOSW

MAJOR

Failure of LOSW

SHDSL_LOSWS_QTR_TRHD

WARNING

15-minute LOSW TCA

SHDSL_LOSWS_DAY_TRHD

WARNING

1-day LOSW TCA

SHDSL_ES_QTR_TRHD

WARNING

15-minute ES TCA

SHDSL_ES_DAY_TRHD

WARNING

1-day ES TCA

SHDSL_SES_QTR_TRHD

WARNING

15-minute SES TCA

SHDSL_SES_DAY_TRHD

WARNING

1-day SES TCA

SHDSL_UAS_QTR_TRHD

WARNING

15-minute UAS TCA

SHDSL_UAS_DAY_TRHD

WARNING

1-day UAS TCA

SHDSL_LOSWS_FE_QTR_TRHD

WARNING

15-minute FE LOSW TCA

SHDSL_LOSWS_FE_DAY_TRHD

WARNING

1-day FE LOSW TCA

SHDSL_ES_FE_QTR_TRHD

WARNING

15-minute FE ES TCA

SHDSL_ES_FE_DAY_TRHD

WARNING

1-day FE ES TCA

SHDSL_SES_FE_QTR_TRHD

WARNING

15-minute FE SES TCA

SHDSL_SES_FE_DAY_TRHD

WARNING

1-day FE SES TCA

SHDSL_UAS_FE_QTR_TRHD

WARNING

15-minute FE UAS TCA

SHDSL_UAS_FE_DAY_TRHD

WARNING

1-day FE UAS TCA

SHDSL_ATN_TRHD

WARNING

Attenuation TCA

SHDSL_FE_ATN_TRHD

WARNING

FE Attenuation TCA

SHDSL_SNM_TRHD

WARNING

SNR Margin TCA

SHDSL_FE_SNM_TRHD

WARNING

FE SNR Margin TCA


Table 5 6 T1/E1 Alarms Description

Alarm Type

Severity Class

Description

DSX1_LOS

MAJOR

Failure of LOS

DSX1_LOF

MAJOR

Failure of LOF

DSX1_AIS

MAJOR

Failure of AIS

DSX1_RAI

MINOR

Failure of RAI

DSX1_LOS_FE

MAJOR

Failure of FE LOS

DSX1_LOF_FE

MAJOR

Failure of FE LOF

DSX1_AIS_FE

MAJOR

Failure of FE AIS

DSX1_RAI_FE

MINOR

Failure of FE RAI

DSX1_ES_QTR_TRHD

WARNING

15-minute ES TCA

DSX1_ES_DAY_TRHD

WARNING

1-day ES TCA

DSX1_SES_QTR_TRHD

WARNING

15-minute SES TCA

DSX1_SES_DAY_TRHD

WARNING

1-day SES TCA

DSX1_UAS_QTR_TRHD

WARNING

15-minute UAS TCA

DSX1_UAS_DAY_TRHD

WARNING

1-day UAS TCA

DSX1_ES_FE_QTR_TRHD

WARNING

15-minute FE ES TCA

DSX1_ES_FE_DAY_TRHD

WARNING

1-day FE ES TCA

DSX1_SES_FE_QTR_TRHD

WARNING

15-minute FE SES TCA

DSX1_SES_FE_DAY_TRHD

WARNING

1-day FE SES TCA

DSX1_UAS_FE_QTR_TRHD

WARNING

15-minute FE UAS TCA

DSX1_UAS_FE_DAY_TRHD

WARNING

1-day FE UAS TCA


Up to 200 alarm logs can be stored in device. While using UNMS, it can save more in Database. User can clear all previous alarm logs by “Clear Alarm Log” function.




5.3.2Maintenance-Interface

5.3.2.1Maintenance-Interface-SHDSL




The Common item of SHDSL in maintenance menu shows the current line status and configuration of SHDSL interface includes: Please refer to previous Section Configuration-Interface-SHDSL for the other parameters.



Line Status: The possible SHDSL operational states are “Idle_State", "Handshaking", "Training", "Sync Hunting", "Connected", "Disconnect", "Analog _Loopback", "Remote_Digital_Loopback", "Digital_Loopback", "Analog_ Loopback_fail", “Remote_Digital_Loopback_fail", "Digital_Loopback_fail", "Port _disable", "Port_Has_Been_Reset", "Unknown_State".





Users can view any historical performance by selecting either port1 or port2 no matter near end or far end.



The PM count can be cleared whenever desired. By PM Clear item, selects ether near or far end and select time interval by current quarter, current day, history quarter or history day. Then select ports with confirmation “YES” to clear PM counts.







  • Current Quarter: The PM parameter count in seconds of the current 15-minute period.

  • Current Day: The PM parameter count in seconds of current 1-day period.

  • History Quarter: Stores up to the 96 of the latest 15-minute PM parameter count records.

  • History Day: Store up to the 7 of the latest one-day PM parameter count records.

5.3.2.2Maintenance-Interface-T1


The Maintenance-interface-T1 and Maintenance-interface-E1 have similar description as Maintenance-interface-SHDSL. Please refer to previous topic Maintenance-interface-SHDSL for detail.


5.3.2.3Maintenance-Interface-E1



5.3.3Maintenance-SHDSL


The Maintenance-SHDSL items help user to check the device version information, Modem status and the front panel LED status.




5.3.4Maintenance-test

5.3.4.1Maintenance-Test-Loopback


For test and diagnostic purpose the S1400 system provides various Loopback paths, which are depicted in Figure 5-1 and Figure 5-2. They are Near End Loopback, Local Loopback, Remote Loopback and Remote Payload Loopback.

The NLB (Near End Loopback) capability will be set up inside STU-C/STU-R as close as possible to the network side /customer side interfaces. The NLB is capable of control (activation and deactivation) by UNMS and CID. An all one’ signal, or AIS, or the received signal will be sent to the loop during the NLB is activated.

The local loopback capability will be set up inside STU-C/STU-R as close as possible to the loop interfaces. The local loopback is capable of control (activation and deactivation) by UNMS and CID. A framed all ones pattern, other codes, or the received signal will be sent to the loop during local loopback.

The RLB (Remote Loopback) is able to be activated and deactivated through EOC via CID and UNMS interfaces. This loopback is used for checking the loop and transceiver units of STU-C/STU-R. A suitable signal will be sent towards the customer side /network side interface during the RLB loopback.

The PLB (Remote Payload Loopback) is able to be activated and deactivated through EOC via CID and UNMS, and be set up inside STU-C/STU-R as close as possible to the network side customer side interfaces. A suitable signal will be sent towards the customer side/network side during the PLB loopback. The PLB of V.35 interface can also be activated and deactivated by in band signal and the procedure and codewords will comply with ITU-T V.54.

For V.35 interface STU-R, the ITU-T V.54 in band activated and deactivated loopback codewords provided by S1400 for end-to-end loopback function.

For each STU-C and STU-R, the built-in PRBS (11-stage or higher) generation and detection will be provided for loopback performance test on a per channel basis. Test results will be displayed.

The S1400 has push buttons that provide interface for control loopback defined as above and display the historical log of alarm, performance information, provisioning parameters and loopback test status on front panel LCD.




Figure 5 7 STU-C Side Activated Loopback



Figure 5 8 STU-R Side Activated Loopback





  • Loopback Test:

Loopback type at CO

Loopback type at CPE

Normal

1. CO Local Loopback

2. CO Local PayLoad Loopback

3. RT Remote Loopback

4. (N/A) RT Remote PayLoad Loopback

5. (N/A) RT Local Loopback

6. RT Local PayLoad Loopback

7. CO Remote Loopback

8. CO Remote PayLoad Loopback


Normal

1. (N/A) CO Local Loopback

2. CO Local PayLoad Loopback

3. RT Remote Loopback

4. RT Remote PayLoad Loopback

5. RT Local Loopback

6. RT Local PayLoad Loopback

7. CO Remote Loopback

8. (N/A) CO Remote PayLoad Loopback


** Where the “(N/A)” items are not selectable when device stands for CO or CPE.

5.3.4.2Maintenance-Test-pattern test




  • Test Pattern: Generate test pattern. Possible values are 2E11-1, 2E15-1, QRSS, 2E20-1 and 2E23-1.

  • Test Direction: The direction the pattern is sent to. Possible values are SHDSL and Interface.

  • Test Period: The period unit is second, User can set to 99999999 sec.

  • Test Start: To start or stop sending the test pattern. Possible values are START and STOP.

5.3.4.3Maintenance-Test-V.54 Test


In addition to loopback test function described in Figure 5-1 and Figure 5-2 the S1000 / S1400 supports V.54 in-band signal to activate and deactivate PLB. The sophisticated addressing capability enables network operator to isolate trouble node by node and from end to end. The procedure and code words comply with ITU-T V.54.

There are various testing methods supported by the S1000 / 1400 as depicted in Figure 5-3. Each node in the T1/E1 traffic path has a unique address, which is configured by the system operator, so the node to be looped back can be identified. Testing pattern can be generated after the loopback is activated. The test result can be notified on the CID or UNMS as “V54 Loopback Test (Address 0x03) OK!!” or “V54 Loopback Test (Address 0x03) FAIL!!”



Figure 5 9 Testing Methods of V.54 Loopback Control



  • V.54 Mode: Disable or Enable ITUT

  • V.54 Action: None Loopback, Stop Loopback, or Start Looppback



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