ISDN Interfaces
ISDN Testing and Troubleshooting
Strata CTX I&M 10/02
5-31
ISDN Inte
rface
s
## BUU LOOP BACK TEST ##
SLOT=ss CIRCUIT=m B1:OK B2:OK D:OK
The above response indicates the test was passed and that the B1, B2 and D channels and the
wire connections for the tested device are operating properly.
If the Strata CTX responds with:
TEST FAIL
The test failure could be caused by:
•
U-terminal is in busy state when the test was started.
•
U-terminal is in TQ/ACB/ACD mode when the test was started
•
The Strata CTX BRI PCB slot or circuit number was not entered correctly.
•
U-terminal can not support loop back testing U-terminal, BRI PCB, or wiring is defective.
If The Strata CTX responds with:
TEST EXIT
Test exit could be caused by:
•
The Strata CTX processor did not get test results from the BRI circuit within 5 second from
start of the test.
•
U-terminal or BRI circuit was unplugged during the test.
•
User made the exit request during testing
RPTU Loop-back Test
The RPTU has loop-back test jumpers that enable physical connections (cables/jacks/plugs)
between the RPTU, CSU, and the network PRI line to be tested (see
Figure 5-28
). The tests check
that the CSU receives and transmits the PRI signal properly in both directions. The test signals,
generated by the Network PRI provider, pass through the CSU and loop around the RPTU. The
RPTU sends the received test signal back through the CSU to the Network and the Network
detector checks for a valid signal.
Figure 5-28
Loop-back Test
CO ISDN
PRI Test
Signal
ISDN PRI
CSU
ISDN PRI
(RJ45)
JP1
(LB-ON)
JP2
(LB-ON)
1.5MHz
line
Interface
LSI
Demarcation Point
2756
RPTU
Network
Jack
RJ48C
or RJ48X
Содержание Strata CTX100
Страница 16: ...Introduction Related Documents Media xii Strata CTX I M 10 02 ...
Страница 94: ...Strata CTX100 Installation Installing the CTX100 Cabinet 2 24 Strata CTX I M 10 02 ...
Страница 150: ...Strata CTX670 Installation Remote Expansion Cabinet Unit 3 56 Strata CTX I M 10 02 ...
Страница 188: ...PCB Installation Network Requirements 4 38 Strata CTX I M 10 02 ...
Страница 238: ...T1 Loop Back Testing 6 12 Strata CTX I M 10 02 ...
Страница 310: ...Station Apparatus 2000 series Telephones 8 48 Strata CTX I M 10 02 ...
Страница 342: ...Peripheral Installation Station Message Detail Recording SMDR 9 32 Strata CTX I M 10 02 ...