18
Section 61245002L6-5, Issue 3
61245002L6-5C
10. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within
ten years from the date of shipment if it does not meet
its published specifications or fails while in service
(see ADTRAN Equipment Warranty, Repair, and
Return Policy and Procedure).
Return Material Authorization (RMA) is required
prior to returning equipment to ADTRAN.
Table I. Troubleshooting Guide
Condition
At powerup, 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
.
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 DSC customer service (see subsection 10 of this practice). 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 Litespan HTU-C slot is AHT1U. Using TL1,
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 DSC customer service (see subsection 10). 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 lops 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 (see subsection 6).
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 (see Control Port
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.
For service, RMA requests, or further information,
contact one of the following numbers.
ADTRAN Customer Service:
ADTRAN Telco Technical Support ........ (800) 726-8663
Standard support hours ............................. Monday-Friday
7 a.m. - 7 p.m. CST
Emergency support .................. 7 days/week, 24 hours/day
Sales .......................................................... (800) 827-0807
RMA (repair service) ............................... (256) 963-8722
Repair and Return Address:
ADTRAN, Inc.
Customer and Product Support (CAPS) Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
