SIP Dial Peer - Detect Failure?

[norman.croft]

Hi

There is an existing solution with a SIP PSTN Trunk coming into a router running CUBE. This is configured with SIP dial peers to route incoming calls across to another voice gateway with links to a TDM switch. The question is, if we were to put in a second voice gateway connecting to the TDM switch, with a second choice SIP dial peer configured on the CUBE router pointing to it, would a failure of the first choice voice gateway be detected such that the second choice SIP dial peer would then be used?

Thanks

Norman

[hattingh]

Yes, you can do this. There are multiple ways of achieving it.

1) You could just do 2 equal preference dial-peers on CUBE pointing to the 2 TDM GWs and calls will randomly load balance over them.

2) You could set up 2 dial-peers with different preferences and which case all calls will go to the primary dial-peer TDM GW and only if that one fails will calls be routed to the secondary dial-peer TDM GW.

3) You can set up an OOD SIP Options ping (keepalive) from CUBE to the TDM GWs so that the trunks between them are monitored and if the trunk to one GW goes down, the dial-peer will be busied out and calls will go to the other GW (for which the turnk is up).

CH