Boghe receiving INVITE without any SDP

[ghost]

Hello!

We are testing Boghe IMS client in our SIP environment (our Call Server)

When Boghe receives INVITE without any SDP it rings and when user answers it sends SDP offer in 200 OK response. Call Server sends SDP answer in the ACK request and the call is established. Like the flow from RFC 3725 (4.1. Flow I). Up to here everything ok.

But then Call Server sends another INVITE without SDP or regular INVITE with SDP but with other SDP RTP data (different RTP IP address and IP port)  Boghe rings again as it received another call. The user must press the Answer button again. Call-ID, From tag, To tag attributes are all OK.

When the first request received by Boghe is INVITE with SDP and second one is INVITE without SDP then everything OK. Boghe does not rings again. The problem is when the first request received by BOGHE is INVITE without SDP.

Anyone can help?

Thanks