Nortel Meridian 1 Option 11C Manual page 83

Far End Trunk loopback test
The far end trunk loopback test checks the integrity of the 2.0 Mb link from
the far end to the carrier interface of the 2.0 Mb DTI (it does not test the 2.0
Mb DTI card). Either a per-loop or per-channel test may be run, with the near
end device placed in the respective mode of remote loopback. Refer to
Figure 10.
The procedures for per-loop loopback tests follow:
Procedure: near-end
Disable the 2.0 Mb DTI card
Place the 2.0 Mb DTI card in
remote per-loop loopback
Procedure: far-end
Disable the 2.0 Mb DTI
channel
Place the 2.0 Mb DTI
channel in remote loopback
DTI Maintenance
Overlay Command
LD 60 DISL L
LD 60 RLBK L
Overlay Command
LD 60 DSCH L CH
LD 60 RLBK L CH
Option 11C
Page 83 of 126
2.0 Mb DTI/PRI