ADTRAN DS3 NIU3 PM, Installation And Maintenance Practice

Page: 28 / 30

28 Issue 5, February 2011 61213075L2-5E
Time Out
After a loopback or pattern test is initiated, unless termi-
nated manually, a time out returns the loop to normal
operation after 20 minutes, 60 minutes, 120 minutes, or
24 hours. The timer is reset at any point by sending the
FEAC loop up code. The test time out can be disabled
through the RS-232 craft interface.
NOTE
When conducting a terminal session always
select VT100 mode in the
Settings
menu prior
to making the RS-232 craft interface
connection.
6. MAINTENANCE
The NIU3 PM does not require maintenance for normal
operation. ADTRAN does not recommend field repairs.
For repair services, refer to
Warranty and Customer
Service .
Relay Replacement
A failed relay can be identified by a process of elimi-
nation. If there is no data transmission during a
malfunction, power loss, or removal of the NIU3 circuit
card, or during a flash upgrade, a failed relay is
indicated. A Relay Replacement Kit (P/N: 1212072L1)
is available from ADTRAN.
CAUTION
Relay prongs are fragile. Take extreme care
when removing and replacing relays so prongs
are not bent or broken.
To remove a relay, perform the following steps:
1. Insert a jumper strap on the posts immediately
adjacent to the suspect relay. This provides a signal
path, bypassing the relay.
2. Using an appropriately-sized IC extractor tool, lift
the relay off its socket.
3. Take note of prong configuration to match polarity
of the replacement relay.
4. Carefully align and insert the replacement relay
until fully seated.
5. Remove the jumper strap.
6. Verify data transmission.
7. SPECIFICATIONS
Specifications for the NIU3 PM are detailed in Table 6
on page 29.
8. 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 .
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