Troubleshooting Guide; Testing; Table 11. Litespan H2Tu-C Troubleshooting Guide - ADTRAN H2TU-C Installation And Maintenance Practice

TROUBLESHOOTING GUIDE

Table 11. Litespan H2TU-C Troubleshooting Guide

Condition
At power up, all front panel
indicators are off
The LED remains Red.
STAT
The LED is off, but the
STAT
LED remains Red.
The LED is off, but the
STAT
LED remains Red.
RLOS

TESTING

"Appendix B, Litespan H2TU-C Provisioning Tutorial"
remote testing of the HDSL2 circuit and associated hardware by using performance
monitoring data, loopback commands, and alarm analysis.
61221002L1-5F
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 customer service at 800-848-
0333. If step 1 passes, but step 2 fails, replace the Litespan
H2TU-C.
1. Verify that the channel bank or ONU BPS power LEDs are on.
2. Verify that the equipment type for the Litespan H2TU-C slot is
AHDSL2. Using TL1, the equipment type is shown with the
command rtrv-eqpt::AID, where AID is the access identifier
(i.e., cot-1-15).
3. If step 1 fails, contact Alcatel customer service. If step 1 and
step 2 pass, replace the Litespan H2TU-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 line card, or equip the slot with the
currently reserved equipment type.
1. Confirm that the HDSL2 loop is not open.
HLOS
2. Confirm that the HDSL2 loop is not shorted.
3. Verify the loop conforms to CSA guidelines and is not too long.
Loop loss at 196 kHz should be less than 35 dB.
4. Verify that the HDSL2 loop has acceptable noise limits.
5. Verify that tip and ring of each HDSL2 loop belongs to the
same twisted pair.
6. If steps 1 through 5 pass, but the HLOS LED remains red,
replace the Litespan H2TU-C.
7. If step 6 fails, replace the Litespan H2TU-C.
1. Check that the framing and line coding are set appropriately
for T1 data at the H2TU-R.
2. Check that the RLOS LED at the H2TU-R is off.
3. If step 1 fails, change the appropriate framing and line coding.
If step 1 passes, but step 2 fails, a problem may exist at the
H2TU-R T1 interface. If the problem does not exist at the T1
interface, replace the H2TU-C.
provides the command structure for
Troubleshooting Guide
15