The alarm suppression mode. When alarms are suppressed, no
alarms will be generated if a fault situation is detected on
the trail termination point (TTP). Failures will still be
shown by the object itsSnkTtpFailure.
notSupported(0). Suppress alarms is not supported by the
interface. This value can not be written.
none(1). No alarms are suppressed. All alarms are reported.
warning(2). Suppress alarms of severity warning only.
all(3). All transmission alarms are suppressed.