Adtran Total Access 750 Manuale Utente
5
61175012L1-5D
Section 61175012L1-5, Issue 4
TEST
+5 V
GND
64 kHz
8 kHz
1
2
3
4
5
6
7
8
9
Figure 3. DB-9 Connector Pinout
T1 Loopbacks
The TA 750 supports several T1 loopbacks via the
craft interface. These loopbacks include:
craft interface. These loopbacks include:
•
Initiating a remote payload or line loopback
command (ESF mode only).
command (ESF mode only).
•
Responding to a remote payload or line
loopback command (ESF mode only).
loopback command (ESF mode only).
•
Responding to a remote CSU loopback
command.
command.
Figure 2 displays where the various loopbacks occur
in the TA 750 BCU circuitry.
in the TA 750 BCU circuitry.
Self Test
The BCU goes into self test when inserted into an
active TA 750 chassis. The self test checks internal
BCU circuitry. A failed test causes the faceplate
Network T1 LED to blink red.
active TA 750 chassis. The self test checks internal
BCU circuitry. A failed test causes the faceplate
Network T1 LED to blink red.
5. SPECIFICATIONS
Refer to Table 5 for TA 750 BCU specifications.
Table 5. Specifications
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6. MAINTENANCE
The TA 750 BCU does not require routine
maintenance for design operation.
maintenance for design operation.
ADTRAN does not recommend that repairs be
attempted in the field. Repair services are obtained
by returning the defective unit to ADTRAN Customer
Service department.
attempted in the field. Repair services are obtained
by returning the defective unit to ADTRAN Customer
Service department.
7. 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: 60000087-10A).
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: 60000087-10A).
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:
to returning equipment to ADTRAN. For service,
CAPS requests, or further information, contact one of
the following numbers:
Part Number
1175012L1
ADTRAN Sales
Pricing/Availability
(800) 827-0807
(800) 827-0807
ADTRAN Technical Support
Presales Applications/Postsales Technical Assistance
(888) 4-ADTRAN
(888) 4-ADTRAN
Standard hours: Monday-Friday, 7 a.m. - 7 p.m. CST
Emergency hours: 7 days/week, 24 hours/day
Emergency hours: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for Repair/Upgrade
(256) 963-8722
(256) 963-8722
Repair and Return Address
ADTRAN, Inc.
CAPS
CAPS