Avaya CS 1000 - Page 117

Prompt Response Description
While waiting for Slip Rate Improvement one of three
DT
A messages is output as shown in
Table 54: Frame
slip improvement timers on page
117.
Table 54: Frame slip improvement timers
SRIM (1)-127
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.
SRMM 1-(2)-127
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 Figure 23: Frame
alignment thresholds on page 1
18 and
Figure 24: Loss of frame alignment on page
118. This
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
Figure 23: Frame alignment
thresholds on page 1
18.
Table 55: DTA message output
DTA019 Frame alignment maintenance limit.
DTA020 Frame alignment out of service limit.
DTI/PRI maintenance tools
ISDN Primary Rate Interface Maintenance November 2011 117