On Nov 17, 2009, at 9:42 PM, Sam Acosta <acosta.sam at gmail.com> wrote: > Hello guys, > > We've been having some problem setting up the High Availability for > Vicidial and Asterisk with CentOS 5.3. > > The VoIP quality are degraded and systems becomes so unstable. > > Are there are other better options. Maybe the poor quality is due to network congestion? You didn't say what you were using now for HA. I have heard of people using Xen with PCI pass-through as a way to provide high-availability to Asterisk. Have 2 Xen boxes with identical hardware, but that can be problematic. Probably the best way is to have multiple physical (small 1u boxes) Asterisk gateways and a central Asterisk router in a VM. Each gateway is expendible as long as one remains standing, the router will route calls to the best available gateway. If the router goes down, it can be brought up in another virtual server. Just need to make sure the virtualization technology can handle the throughput with as little additional latency as possible. Xen should be able to as long as you give the domU enough scheduler credits. There are many ways to skin this cat. -Ross