2009/4/9 Joao Gomes Pereira gomespereira@startel.pt:
If calls are placed through a Cisco Router (connected to Asterisk) Kamailio answers: "513 Message too big" ( ex: Cisco VoIP client -> Cisco Router -> Asterisk -> Kamailio )
Also, the destination phone rings, but the calling party is disconnected because of this 513 message.
Most probably you are getting into loops. Check with ngrep the SIP flow and you'll realize that Kamailio is sending requests to *itself*.