2
Section 61244065L1-5, Issue 1
61244.065L1-5A
5.
TEST SETUPS
When using the TAC to test pairs, consideration must be given
to the configuration setup for the type of test being performed
to ensure a valid test. Available access is detailed in Table A.
To loopthru the CO pairs to the field pairs, put SW1 in the
LOOPTHRU position as indicated on the card (see Figure 3).
This bridges the circuit pairs.
For test access using the TAC, insert the TAC into the repeater
housing. For the single slot housing, the print on the TAC
should face away from the pole or wall. For the four-slot
housing, the print on the TAC should face the label of the
position you are testing.
Testing the CO Pairs
To loopback the circuit, put SW1 in the LOOPBACK position
as indicated on the card (see Figure 2). This loops the circuit
back to the CO and to the field.
Table A. Available Access
Label
P7
P13
P5
P15
P41
P47
P55
P49
P17
P1
P11
P35
Description
LOOP1 Transmit towards NET
LOOP1 Receive towards CUST
LOOP1 Transmit towards CUST
LOOP1 Receive towards CUST
LOOP2 Transmit towards NET
LOOP2 Receive towards NET
LOOP2 Transmit towards CUST
LOOP2 Receive towards CUST
-48 RET
Frame Ground
Frame Ground
-48 volts
Figure 2. SW1 Loopback Configuration
To short the CO pairs, put SW1 in the SHORT position as
indicated on the card (see Figure 4). This connects transmit to
receive on each loop.
Figure 3. SW1 Loopthru Configuration
To open the circuit, put SW1 in the OPEN position as indicated
on the card (see Figure 5). This allows for a voltage measurement
across pairs.
Figure 4. SW1 Short Configuration
6.
MAINTENANCE
The ADTRAN T400 TAC requires no routine maintenance.
ADTRAN does not recommend that repairs be performed in
the field. Repair services may be obtained by returning the
defective unit to ADTRAN.
7.
WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within five years
from the date of shipment if it does not meet its published
specifications or fails while in service (see ADTRAN Equipment
Warranty, Repair, and Return Policy and Procedure).
Return Material Authorization (RMA) is required prior to returning
equipment to ADTRAN.
For service, RMA requests, or further information, contact one
of the following numbers:
ADTRAN Technical Support ............. (800) 726-8663
Standard support hours, Monday-Friday, 7am-7pm CST
Emergency Support: 7 days/week, 24 hours/day
ADTRAN Sales ................................... (800) 827-0807
ADTRAN Repair/RMA ........................ (800) 963-8722
Repair and Return Address
ADTRAN, Inc.
Customer Service Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
Figure 5. SW1 Open Configuration
LOOP BACK
LOOP 1
LOOP 2
P7
T
P13 R
P41 T
P47 R
T
P5
R P15
T
P55
R P49
CUST
NET
LOOP THRU
LOOP 1
LOOP 2
P7
T
P13 R
P41 T
P47 R
T
P5
R P15
T
P55
R P49
CUST
NET
SHORT
LOOP 1
LOOP 2
P7
T
P13 R
P41 T
P47 R
T
P5
R P15
T
P55
R P49
CUST
NET
OPEN
LOOP 1
LOOP 2
P7
T
P13 R
P41 T
P47 R
T
P5
R P15
T
P55
R P49
CUST
NET
