Number of degraded minutes (DMs).
Gauge
Read-only
p.7.1.10.n, where n = the index number of the DS1 interface.
A degraded minute is one in which the estimated error rate exceeds 1E-6 but does not exceed 1E-3 (see CCITT Specifications Volume III, Recommendation G.821).
Degraded minutes are determined by the following process:
Collecting all of the available seconds.
Removing any severely errored seconds.
Grouping the result in 60-second long groups.
Counting a 60-second long group as degraded if the cumulative errors during the seconds present in the group exceed 1E-6.
Available seconds are those seconds that are not unavailable seconds (dsx1CurrentUASs).