Maintenance; Figure 4. Position Switch Settings At Network Locations - ADTRAN Total Access 750 U-BR1TE Installation And Maintenance Manual

When the Test Initiate Voltage is removed, the test
tone is subsequently removed, the active test status
indication to the bank controller is removed, and the
Return to Normal MP-EOC message is sent to the
LULT. The channel unit then begins re-synchronization
of the U-interface between the LUNT and the ISDN
switch.
Channel Test (LULT Mode)
Upon receipt by the LULT of the MP-EOC message,
the following events occur:
• The channel unit notifies the SCU that an MLT
test is underway.
• The LULT connects the bypass pair. This
connects the customer drop to the common
equipment through TEST_R and TEST_T. The
set-up sequence is complete.
• Upon completion of the automatic test the bypass
relay de-energizes.
• The channel unit then attempts to re-synchronize
the U-interface between the LULT and the NT1.
Total Access 1500/750
2-Wire
HD-10 BRI Mux HD-10 BRI Mux HD-10 BRI Mux
1181200L1 1181200L1 HD-10 BRI Mux HD-10 BRI Mux QFC-C
POWER 1181200L1 1181200L1 1181200L1 1181300L1
POWER PWR
DSX DSX DSX #1
LBK LBK
DSX #2
DSX #3
LBK DSX #4
TST
ALM
Adjacent to
ISDN
SWITCH
Total Access 750
2-Wire
PSU BCU FXS
FXS FXS
1181200L1 1181200L1 1181300L1 1181300L1 1181300L1
C
R PWR PWR PWR
F A
T DSX #1 DSX #1 DSX #1 DSX
DSX #2 DSX #2 DSX #2 DSX
DSX DSX #3 DSX #3 DSX #3 DSX
LBK DSX #4 DSX #4 DSX #4 DSX
POWER
Adjacent to
Switch

Figure 4. Position Switch Settings at Network Locations

61180020L1-5B
T Carrier
QFC-C QFC-C QFC-C T1-OR T1-OR T1-OR T1-OR HTU-C
1181300L1 1181300L1 1181300L1 1181310L1 1181310L1 1181310L1 1181310L1 1181101L1 HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C
PWR PWR PWR PWR PWR PWR PWR 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1
DSX #1 DSX #1 DSX DSX DSX PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR
#1 DSX DSX DSX DSX DSX DSX DSX DSX DSX DSX DSX
DSX #2 DSX #2 DSX #2 LBK LBK LBK LBK TST TST TST TST DSX DSX DSX DSX DSX
DSX #3 DSX #3 DSX #3 LP LP LP LP TST TST TST TST TST TST TST TST TST TST
DSX #4 ALM LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1
DSX #4 DSX #4 ALM ALM ALM LP2 LP2 LP2 LP2 LP2 LP2 LP2 LP2 LP1
TST TST TST + + + ALM ALM ALM LP2 LP2 LP2 LP2 LP2 LP2
ALM ALM ALM T R T R T R + T R ALM ALM ALM ALM ALM ALM ALM ALM ALM ALM ALM
6V 6V 6V 6V
– X X – X X – X X – X X
Switch
Total Access 750
T Carrier
PSU BCU
FXS FXS FXS FXS FXS
FXS FXS NX64 1181200L1 1181200L1 1181300L1
C 1181300L1 1181300L1 1181300L1 1181310L1
1181300L1 1181310L1 1181310L1 R PWR PWR PWR PWR PWR
PWR PWR A
T F DSX #1 DSX #1 DSX #1 DSX #1 DSX
#1 DSX PWR
DSX #2 DSX #2 DSX #2 DSX #2 LBK
#2 LBK DSX
DSX DSX #3 DSX #3 DSX #3 DSX #3 LP
#3 LP LBK
LBK DSX #4 DSX #4 DSX #4 DSX #4 ALM
#4 ALM LP
ALM POWER
Tandem Office
(Source)/U-Repeater
61180020L1-5, Issue 2
Figure 4 is an illustration of the switch settings at the
network location.

5. MAINTENANCE

The ADTRAN U-BR1TE does not require
maintenance for normal operation.
ADTRAN does not recommend that repairs be
performed in the field. Repair services may be obtained
by returning the defective unit to ADTRAN. Refer to
Warranty and Customer Service section for further
information.
Total Access 1500/750
HD-10 BRI Mux HD-10 BRI Mux HD-10 BRI Mux
1181200L1 1181200L1 HD-10 BRI Mux HD-10 BRI Mux QFC-C QFC-C QFC-C QFC-C T1-OR T1-OR T1-OR T1-OR HTU-C
POWER 1181200L1 1181200L1 1181200L1 1181300L1 1181300L1 1181300L1 1181300L1 1181310L1 1181310L1 1181310L1 1181310L1 1181101L1 HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C HTU-C
POWER PWR PWR PWR PWR PWR PWR PWR PWR 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1 1181101L1
DSX DSX DSX #1 DSX #1 DSX #1 DSX DSX DSX PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR PWR
LBK LBK #1 DSX DSX DSX DSX DSX DSX DSX DSX DSX DSX DSX
DSX #2 DSX #2 DSX #2 DSX #2 LBK LBK LBK LBK TST TST TST TST DSX DSX DSX DSX DSX
DSX #3 DSX #3 DSX #3 DSX #3 LP LP LP LP TST TST TST TST TST TST TST TST TST TST
LBK DSX #4 DSX #4 ALM LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1 LP1
DSX #4 DSX #4 ALM ALM ALM LP2 LP2 LP2 LP2 LP2 LP2 LP2 LP2 LP1
TST TST TST TST + + + ALM ALM ALM LP2 LP2 LP2 LP2 LP2 LP2
ALM ALM ALM ALM T R T R T R + T R ALM ALM ALM ALM ALM ALM ALM ALM ALM ALM ALM
6V 6V 6V 6V
– X X – X X – X X – X X
Adjacent to
Customer
Total Access 750
2-Wire
PSU
NX64 BCU FXS FXS FXS FXS FXS
1181200L1 1181200L1 NX64
1181310L1 1181300L1 1181300L1 1181300L1 1181300L1 1181310L1 1181310L1
C R PWR PWR
A PWR PWR PWR
PWR F DSX #1 DSX #1 DSX #1 DSX #1 DSX PWR
T
DSX DSX #2 DSX #2 DSX #2 DSX #2 LBK DSX
LBK DSX DSX #3 DSX #3 DSX #3 DSX #3 LP LBK
LP LBK DSX #4 DSX #4 DSX #4 DSX #4 ALM LP
ALM ALM
POWER
Tandem
Office (Sink)
Note:
Customer
NT1
2-Wire
Total Access 750
T Carrier
PSU BCU FXS FXS FXS FXS
1181200L1 1181200L1 FXS NX64
1181300L1 1181300L1 1181300L1 1181300L1 1181310L1 1181310L1
C R
A PWR PWR PWR PWR PWR
F DSX #1 DSX #1 DSX #1 DSX #1 DSX PWR
T
DSX #2 DSX #2 DSX #2 LBK DSX
DSX #2
DSX #3 DSX #3 DSX LP LBK
DSX #3 DSX #3
DSX #4 DSX #4 ALM LP
LBK DSX #4 DSX #4
ALM
POWER
Adjacent to
Customer
Refer to bottom of Table 1 to
interpret switch settings
Customer
NT1
2-Wire
9