Troubleshooting - ADTRAN HTU-C NB Installation And Maintenance Practice

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice

TROUBLESHOOTING

Table 15 is a troubleshooting guide for the HTU-C NB/WB for Litespan.
Condition
At power up, all front
panel indicators are off.
The FAIL LED remains on.
The FAIL LED is off, but
the HDSL LED remains
red.
The FAIL LED is off, but
the HDSL LED remains
yellow.
30
Table 15. Troubleshooting Guide
Solution
1. Verify that the channel bank or ONU BPS power LEDs are on.
2. Make sure that the unit is fully and correctly inserted into the channel
bank or ONU.
3. If step 1 fails, contact Alcatel-Lucent customer service (refer to
"Appendix B, Warranty"). If step 1 passes, but step 2 fails, replace the
HTU-C.
1. Verify that the channel bank or ONU BPS FAIL LEDs are off.
2. Verify that the equipment type for the HTU-C NB/WB for Litespan
slot is AHT1U. Using TL1, equipment type is shown with the com-
mand rtrv-eqpt::AID, where AID is the access identifier
(i.e., cot-1-15).
3. If step 1 fails, contact Alcatel-Lucent customer service (refer to
"Appendix B, Warranty"). If step 1 and step 2 pass, replace the HTU-
C. If step 1 passes but step 2 fails, delete the equipment record
(i.e., dlt-eqpt::cot-1-15 with TL1) and reinsert the card, or equip the
slot with the currently reserved equipment type.
1. Check that neither HDSL loop is open.
2. Check that neither or both HDSL loops are shorted.
3. Verify the loop conforms to CSA guidelines and is not too long. Loop
loss at 200 kHz should be less than 35.25 dB.
4. Verify that both HDSL loops have acceptable noise limits (refer to
"HDSL Deployment
5. Verify that tip and ring of each HDSL loop belongs to the same
twisted pair.
6. If steps 1 through 5 pass, but the HDSL LED remains red, replace the
HTU-C.
7. If step 6 fails, replace the HTU-R and the HRE.
1. Check that the framing and line coding are set appropriately for T1
data at the HTU-R and for cross-connected T1 data coming to the
HTU-C.
2. Check that the DS1 LED at the HTU-R is green.
3. If step 1 fails, change the appropriate framing and line coding (refer
to "Provisioning"). If step 1 passes, but step 2 fails, a problem may
exist at the HTU-R T1 interface. If the problem does not exist at the
T1 interface, replace the HTU-C.
Guidelines").
61247002L1-5A