Nortel Communication Server 1000 Maintenance Manual page 105

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DISL C
RLBK C
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:
DISL C
RMST C
Note: The Remote self-test (external loopback test) can be
run through any loopback that is external to the DTI/PRI card.
The loopback can range from a loopback connector plugged
into the NTBK04 cable to a remote loopback on the far-end
DTI/PRI, or at any point in between on the DS-1 facility.
Figure 18 "DTI/PRI link diagnostic and remote loopback tests"
(page 106) shows the relationship between the remote loopback
test and the link diagnostic test.
Nortel Communication Server 1000
ISDN Primary Rate Interface Maintenance
NN43001-717 03.01
11 May 2009
DTI/PRI maintenance tools 105
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