I'm playing with branch and i'm using this simple route (copied from kamailio website) route { seturi("sip:a@example.com"); append_branch("sip:b@example.com"); append_branch("sip:c@example.com"); t_relay(); break; } A B & C rings at the same time. If B or C aren't registered, and the caller send a CANCEL, it receives also a 404 messsage because for example B wasn't online. Is it possible that Kamailio "absorb" this 404? I don't want that my caller receive it :) Marino Maria Mileti marino.mileti(a)alice.it --- Questa e-mail è stata controllata per individuare virus con Avast antivirus. https://www.avast.com/antivirus