Troubleshooting Procedures; Maintenance; Product Specifications; Warranty And Customer Service - ADTRAN DDM Plus HTU-C Installation And Maintenance Manual

7. TROUBLESHOOTING PROCEDURES

Table 10 is a troubleshooting guide for the
ADTRAN DDM Plus HTU-C.
Table 10. Troubleshooting Guide
Condition:
Front panel indicator is off.
Solution:
1. Verify that -48 Vdc power is properly connected to the
shelf.
2. Inspect the fuse (F1) and verify that it is not blown.
3. Insert the HTU-C into a known good slot and check for
on condition of the STATUS indicator.
4. If Steps 1 and 2 pass, but Step 3 fails, replace the
HTU-C.

8. MAINTENANCE

The ADTRAN DDM Plus HTU-C requires no
routine maintenance. In case of equipment
malfunction, use the faceplate-mounted DB-9
RS-232 terminal interface to help in troubleshooting
the source of the problem.
ADTRAN does not recommend that repairs be
performed in the field. Repair services may be
obtained by returning the defective unit to the
ADTRAN Customer and Product Support (CAPS)
Department.
18

9. PRODUCT SPECIFICATIONS

Product specifications are detailed in Table 11.

10. WARRANTY AND CUSTOMER SERVICE

ADTRAN will replace or repair this product within
10 years from the date of shipment if it does not
meet its published specifications or fails while in
service (see ADTRAN Carrier Networks Equipment
Warranty, Repair, and Return Policy and
Procedure, document 60000087-10).
Contact Customer and Product Service (CAPS)
prior to returning equipment to ADTRAN.
For service, CAPS requests, or further information,
contact one of the following numbers
ADTRAN Sales
Pricing/Availability
(800) 827-0807
ADTRAN Technical Support
Presales Applications/Post-sale Technical Assis-
tance
(800) 726-8663
Standard hours: Monday-Friday, 7 a.m. - 7 p.m.
CST
Emergency hours: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for Repair/Upgrade
(256) 963-8722
Repair and Return Address
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
Section 61245003L6-5, Issue 5 61245003L6-5E