[SR-Users] IMS and SIP over WebSocket 500/Error

DURECU, OLIVIER (OLIVIER) olivier.durecu at alcatel-lucent.com
Tue Apr 1 12:02:45 CEST 2014

Hello all,

I have installed Kamailio 4.1.2 in IMS configuration (3 Kamailio instances to run in P/I/S-CSCF modes)

Everything works fine with Native IMS clients (Boghe)

I want now to introduce Web clients using WebSockets. I have added to the P-CSCF Kamailio.cfg the websockets parts
Registration is Ok but I can't manage placing a call.

With SIPoWS, the contact header is sip:olivier at 132.invalid. So when the P-CSCF receives a terminating INVITE, its destination URI is sip:olivier at 132.invalid , it tries to make a DNS resolution of 312.invalid and it doesn't forward to the client saying the domain is unknown and can't be routed

I guess that something is missing in my configuration around aliases/nathelper/outbound but didn't find what...

Thanks for any help

Olivier DURECU
Bell Labs / IP Platform Research
Villarceaux Center
Tel: +33(0) 130772759
GSM: +33(0) 683776482

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