Nortel Meridian 1 Option 11C Manual page 72

Page 72 of 100 DTI/PRI Maintenance
553-3011-310 Standard 13.00
There are three frame alignment thresholds set in LD 73. When a maintenance
or out of service threshold is reached, a DTA message is output as shown
below.
DTA019
DTA020
Figure 11
Frame alignment thresholds
DTA 019--maintenance threshold
A warning message is printed
LFAL 1-(17)-10240
LFAC 0-(3)-128
24 hour out-of-service limit.
Maximum number of times a PRI can be taken out of service
(DTA 020) in 24 hours. When this count is reached, the
PRI will not be restored to service automatically.
When LFAC is set to zero, the PRI will not be taken out-of-service.
January 2002
Fame alignment maintenance limit
Frame alignment out of service limit
1-(511)-10240
DTA 020--out-of-service threshold
The PRI is taken out of service and
red alarm (local alarm) is raised.
A red alarm due to DTA 020 must be cleared
manually.