Remote loopback and remote self-test
The remote loopback and the remote self-test are performed manually per loop (or per system
card).
Remote loopback
The RLBK C command puts the DTI/PRI into loopback toward the far end so a remote self-
test can be performed on equipment at the far end.
Note:
The DTI/PRI loop (card) being tested must be disabled.
Remote loopback test
The remote self-test, also called the external loopback test, checks the integrity of the DTI/PRI
through an external T-1 loopback. If the Remote Loopback command (RLBK) is executed at
the far-end system prior to executing the Remote self-test command (RMST) at the near end,
the integrity of the DS-1 facility is tested from end-to-end.
Note:
The DTI/PRI channel or loop (card) being tested must be disabled.
Coordinating the tests
1.
When a technician at the far end requests a remote loopback on the local system:
a. Enter the following command in LD 96 to disable the DCHI (for PRI DCHL
or BCHL):
DIS DCH N
b. Enter the following command in LD 60 to disable the DTI/PRI card and
activate remote loopback mode:
DISL C
RLBK C
2. To run the remote self-test (external loopback test) through a loopback on the far-
end system:
a. Call a technician at the far end. Ask for remote loopback mode on the
facility to be tested.
b. When loopback mode at the far end is confirmed, enter the following
command in LD 96 to disable the DCHI (for PRI DCHL or BCHL):
DIS DCH N
c. Enter the following command in LD 96 to disable the DTI/PRI card and
run loopback test:
1.5 Mb DTI/PRI maintenance
110 ISDN Primary Rate Interface Maintenance November 2011
Comments? infodev@avaya.com
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