This attribute displays whether the Trail Trace Mismatch (TTM)
alarm state has been entered. The TTM alarm state is entered when
TTM defects have been observed and accumulated for a period of
2.5 seconds +/- 0.5 seconds. The TTM defect is reported when the
trail access point identifier contained in the Trail Trace (TR) field in
the received frame fails to agree with the expected identifier. If the
TTM defects are intermittently occurring, the TTM defect
accumulator is decremented at a rate of 1/10 of the incrementing
rate (alarm integration ratio of 1/10), with all measurements based
on a 200 ms polling cycle.
The TTM alarm is cleared when the trail access point identifier in
the received frame agrees with the expected identifier for a period of
10 seconds +/- 0.5 seconds.
The trailTraceMismatch attribute is always set to off when the E3
component has been locked and left offline.
Both the expected trail access identifier and the transmitted trail
access identifier are provisionable attributes of the G832
component.