[SR-Users] how to route to new URI on failure

I'm trying to route failed calls to a voicemail URI. The failure route couldn't be simpler: failure_route[FAIL_ONE] { if (t_is_canceled()) { exit; } if( t_check_status("486|408") { append_branch( "sip:foo@2.2.2.2"); t_relay(); } } But, it doesn't work. For example, let's say the initial INVITE resolves to a local device "me(a)1.1.1.1".1.1". This works fine, and the phone rings. After a timeout, the failure_route executes. The branch "foo(a)2.2.2.2" gets appended, and kamailio sends a new INVITE, but instead of determining the correct proxy for the new address, it sends the INVITE, with the new URI, to the device that original received the INVITE, "me(a)1.1.1.1".1.1". Obviously, this doesn't work. I've been able to force kamailio to route the call correctly by modifying failure_route[ to use t_relay_to_udp() as follows: failure_route[FAIL_ONE] { if (t_is_canceled()) { exit; } if( t_check_status("486|408") { append_branch( "sip:foo@2.2.2.2"); t_relay_to_udp( "2.2.2.2", "5060"); } } But, it seems like kamailio should figure what where to send the new INVITE itself. What am I doing wrong? -- Mark Sidell Partner Forte, Inc. 919-942-7068 fax 919-969-2844 www.forteinc.com