Avaya CS 1000 Maintenance Manual page 116

1.5 Mb DTI/PRI maintenance
Figure 22: Frame slip non-tracking thresholds
Frame slippage improvement timers
Once the frame slip out-of-service threshold has been reached, the DTI/PRI software invokes
a Slip Rate Improvement mechanism to monitor the slippage and return the DTI/PRI card to
service if a specific criterion has been met. The criterion used to determine that the slip rate
has improved enough to return a DTI/PRI card to service is that the maintenance threshold is
exceeded less than M (the LD 73 prompt SRMM defines M) times in N (the LD 73 prompt SRIM
defines N).
It is important to realize that this monitoring applies to both tracking and non-tracking modes.
Note that a DTI/PRI card in the Slip Rate Improvement state is always in non-tracking mode,
even if it was in tracking mode before frame slippage exceeded the out-of-service threshold.
There are two thresholds set in LD 73 as described in
timers on page 117.
Table 53: LD 73 - SRIM and SRMM prompts
Prompt
SRIM
SRMM
116 ISDN Primary Rate Interface Maintenance
Response
(1)-127 Slip Rate Improvement time in minutes.
After the tracking or non-tracking mode frame slippage
out-of-service threshold is exceeded, the slip rate is
monitored for improvement. If the non-tracking
maintenance threshold exceeds SRMM or fewer times
in the duration of this timer, then the trunks are
returned to service. Otherwise, this timer is reset and
monitoring continues.
1-(2)-127 Slip Rate exceeded maintenance limit.
Number of times the Slip Rate exceeds the
maintenance limit while waiting for Slip Rate
Improvement during the time window specified at the
SRIM prompt.
Comments? infodev@avaya.com
Table 54: Frame slip improvement
Description
November 2011