We have CVP comprehensive setup with side A and Side B in different geographical location namely Side A in Baroda and Side B in Bangalore.
Side A has separate Voice Gateways, CVP and Communication Manager Cluster Side B has separate Voice Gateways, CVP and Communication Manager Cluster
Please find the attached doc to understand the call flow.
Bangalore CVP is down at this time call should go to Baroda CVP i.e., the call has to go from Side B Voice Gateway to Side A CVP It is taking nearly 30s for changing dial-peer preference 1 to preference 2.
Is there any possibility to reduce the delay in CVP failover calls.
what you need to make sure is you turn down the retries in the SIP user agent. I use the following:
retry invite 1
retry response 1
retry bye 1
retry cancel 1
timers expires 60000
The default is 6 - you can see these INVITES on the wire. It's doing all those retries until it determines that the SIP B2BUA on CVP1 is not responding and then it goes to your second preference dial peer.
I'm surprised you deployed this without a pair of SIP proxies. The proxy will handle this in a slightly better way because it is alternating CVPs anyway, so only half the calls need to detect a "no response" to the INVITE and flip to the other. But retries must be turned down in the proxy too.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...