Hi Daniel. I have try. Now "180 ringing" is sending to SBC by kamailio. But kamailio adds "Contact" header to forwarded message. Can you look, please?
Linphone to kamailio ``` SIP/2.0 180 Ringing Via: SIP/2.0/TLS 1.2.3.4:5061;branch=z9hG4bK460b.6e02acd9418a5aae97a9d5f79aeffc53.0 From: sip:1111@1.2.3.4:5061;tag=14003117305244 To: sip:2222@5.6.7.8:5061;transport=tls;user=phone;tag=S7nIf9Z Call-ID: 0KaR2073911201UQbcGhEfDeMek CSeq: 669313 INVITE User-Agent: LinphoneAndroid/4.0.1 (belle-sip/1.6.3) Supported: replaces, outbound Content-Length: 0 ```
kamailio to SBC ``` SIP/2.0 180 Ringing From: sip:1111@1.2.3.4;tag=14003117305244 To: sip:2222@5.6.7.8;tag=S7nIf9Z Call-ID: 0KaR2073911201UQbcGhEfDeMek CSeq: 669313 INVITE Content-Length: 0 Via: SIP/2.0/UDP 1.2.3.4:5060;rport=5060;received=10.56.63.10;branch=z9hG4bK00000005167007511555 Contact: sip:atpsh-5bf3d61d-2547-1@10.56.42.33 Record-Route: sip:KITS1.MSS.LIFE.COM:5060;transport=UDP;lr
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