Nortel Meridian 1 Option 11C Manual page 68

Page 68 of 100 DTI/PRI Maintenance
553-3011-310 Standard 13.00
Figure 8
Frame slip tracking thresholds
DTA 015--maintenance threshold
A warning message is printed
SRTK
1-(5)-24
January 2002
1-(30)-3600
DTA 016--out-of-service threshold.
The PRI is taken out of service and
red alarm (local alarm) is raised.
The Slip Rate Improvement monitoring
(SRIM and SRMM) will be invoked. A loop
in the improvement state is always in
non-tracking mode even if it was in trackin
mode before frame slippage exceeded the
out of service threshold.