By initiating a timer to hold the call state information the H.323 Trunk Link Recovery feature results in fewer call failures caused by IP network failures or disruptions.
Communication Manager preserves calls and starts a timer at the onset of network disruption (signaling socket failure):
If the signaling channel recovers before the timer expires, all call state information is preserved and the signaling channel is recovered.
If the signaling channel does not recover before the timer expires, the system
raises an alarm against the signaling channel
maintains all connections with the signaling channel
discards all call state information about the signaling channel
