61223424L2-5A Issue 1, December 2003 19
8. MAINTENANCE
The T200 H4TU-R requires no routine maintenance for
normal operation. In case of equipment malfunction,
use the front panel bantam jack connectors to help
locate the source of the problem. Verification of
possible trouble indications may be accomplished using
the Troubleshooting Guide in Table 9.
ADTRAN does not recommend that repairs be
attempted in the field. Repair services may be obtained
by returning the defective unit to ADTRAN. Refer to
the Warranty and Customer Service section for further
information.
9. SPECIFICATIONS
Specifications for the T200 H4TU-R are detailed in
Table 10.
10. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within the
warranty period if it does not meet its published specifi-
cations or fails while in service. Warranty information
can be found at www.adtran.com/warranty
.
U.S. and Canada customers can also receive a copy of
the warranty via ADTRAN’s toll-free faxback server at
877-457-5007.
• Request document 414 for the U.S. and Canada
Carrier Networks Equipment Warranty.
• Request document 901 for the U.S. and Canada
Enterprise Networks Equipment Warranty.
Refer to the following subsections for sales, support,
CAPS requests, or further information.
ADTRAN Sales
Pricing/Availability:
800-827-0807
ADTRAN Technical Support
Pre-Sales Applications/Post-Sales Technical
Assistance:
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
Contact Customer and Product Service (CAPS) prior to
returning equipment to ADTRAN.
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
Table 9. Troubleshooting Guide
Condition: All front panel indicators are off.
Solutions:
1. Make sure the H4TU-R is properly seated in the housing.
2. Verify that the enclosure is delivering sufficient voltage to the unit.
If steps 1 and 2 pass and front panel indicators remain off, replace the H4TU-R.
Condition: DSL 1/DSL 2 LED is red.
Solutions:
1. Verify that loss (attenuation) on Detailed System Status screen is < 32 dB on the first segment of the circuit and
< 28 dB on the second and third segments of the circuit.
2. Verify that the loop meets requirement stated in the HDSL4 Deployment Guidelines section of this practice.
3. Verify that noise on the HDSL4 loops is within acceptable limits.
If steps 1-3 pass and LED is red, replace the H4TU-R.
