This read-only CoriantTypesEnableSwitch value reports whether a detected TIM (Trace Identifier Mismatch) defect will cause the NE to insert AIS (Alarm Indication Signal) downstream, defaulting to disabled. Enabling this determines whether a trace mismatch is just reported as an alarm or actively propagated downstream as a consequent-action AIS, which affects how far the fault visibly spreads through the network. For example, with oduTimAct enabled, a genuine TIM defect on this ODU would cause downstream equipment to also see AIS, clearly signalling the fault beyond just the local alarm.