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61212075L1-5C Section 61212075L1-5, Issue 3 5
5. TESTING
The NIU3 is compatible with standard test equipment.
Digital testing is accomplished with the T-BERD 310
or equivalent. The test device at the CO inserts a DS3
NIU FEAC loop up code (C-bit parity framing only)
toward the NIU3. The NIU3 then performs a network
loopback. The loopback is terminated by a DS3 NIU
FEAC loop down code. The loopback command can
also be enabled or terminated with the front panel
LBK pushbutton.
Timeout
After a loopback is initiated, unless terminated
manually, a time out returns the loop to normal
operation after 120 minutes. The timer is reset at any
point by sending the FEAC loop up code.
6. MAINTENANCE
The DS3 NIU does not require routine maintenance
for normal operation.
7. SPECIFICATIONS
See Table 2 for specifications and part numbers.
8. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within
ten (10) years from the date of shipment if it does not
meet its published specifications or fails while in
service. Refer to ADTRAN U.S. and Canada Carrier
Networks Equipment Warranty, 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
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
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807