Avaya CS 1000 Maintenance Manual page 117

Prompt
Table 54: Frame slip improvement timers
SRIM
SRMM
Frame alignment
Loss of frame alignment occurs when the DTI/PRI card stops receiving the framing pattern on
the DS-1 byte stream for a pre-defined period of time (three seconds). See
alignment thresholds
condition can occur as a result of the far end of the T1 span going completely out-of service
or any other reason resulting in losing the incoming DS-1 pulse stream.
Loss of frame alignment thresholds DTI/PRI hardware detects out-of-frame conditions.
Running the midnight routines prints the number of occurrences when frame alignment was
lost and clears the counters.
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 in
thresholds
Table 55: DTA message output
DTA019
DTA020
ISDN Primary Rate Interface Maintenance
Response
DTA 026 - Frame slip out-of-service limit has been reached while
monitoring frame slip improvement. Trunks remain out-of-service, and
improvement timer is restarted.
DTA 028 - Frame slip maintenance limit has been reached while
monitoring frame slip improvement. Trunks remain out-of-service, and
improvement timer is restarted.
DTA 029 - Frame slip improvement timer has expired, Slip Rate
Improvement Criteria has been met. Trunks are being returned to
service.
1-(2)-127
on page 118 and
on page 118.
Frame alignment maintenance limit.
Frame alignment out of service limit.
Description
While waiting for Slip Rate Improvement one of three
DTA messages is output as shown in
slip improvement timers
(1)-127
Figure 24: Loss of frame alignment
DTI/PRI maintenance tools
Table 54: Frame
on page 117.
Figure 23: Frame
on page 118. This
Figure 23: Frame alignment
November 2011 117