This read-write Integer32 (250-65535 milliseconds) sets the hangover time for Voice Activity Detection on an AAL2 SVC/PVC: after voice inactivity is detected, the gateway waits this long before actually activating silence suppression, and the value is only used when the call agent's CRCX does not override it. An admin cares because too short a hangover can clip the tail end of speech as false silence, while too long delays the bandwidth savings from silence suppression. For example, an operator noticing clipped word endings on calls might increase this timer so silence suppression activates less aggressively.