[asterisk-ha-clustering] Active/Standby call interruption durring failover

[Marcin J. Kowalczyk]

C. Mylonas (Mr VoIP) pisze:
> I wondered about this as well - the way I thought it could happen is 
> if there was a voip gatway/proxy where all the media was passing 
> through, and to detect the hangup on the near-end server before 
> hanging up the remote end.
I wonder if there is way to do clustering as siemens does in 
hiQ4200/8000 soft switch. Siemens uses Active/Active ha (Veritas cluster 
or Prime Cluster depending on SW release). Both nodes are running two 
sip proxy managers - one active second standby (sip manager process). In 
case of failover running node takes IP of failed one and spare sip 
manager process takes care about all trafic. No calls are terminated 
durring failover.
Is it possible to have same solution with asterisk or asterisk + openser?