hi,

We have a Top-Down based Route Group configured with two SIP trunks for Recording Servers. It takes approx 5 seconds for the second Recording Server to get a SIP INVITE if the first computer in the Route Group is powered off. This happens for all calls while the first computer is down and results in the first 5 seconds of every call not being recorded. We are able to adjust the duration by modifying the SIP TCP Timer in the Service Parameters. We are not sure if adjusting this timer is a good idea, considering that it is a system wide configuration and affects all trunks.
 
It looks like the Call Manager always tries the first trunk first regardless of whether the first trunk is up or not. Desired behavior would be that the Call Manager detects the failure on the first call; and send subsequent INVITEs to the second server until the first server was back up and running.
 
Is this behavior configurable or is there a recommended approach to handling this scenario so that we don¿t lose recording the first few seconds of a call?

Thanks.