Hello I've tested it. It works. Kamailio is now sending the ACK for the 487.
Bellow traces. <==[387 bytes]==[2024-11-14 19:03:58.592143] 10.192.117.6:5030 => 10.192.117.6:5084 ==== SIP/2.0 487 Request Terminated Via: SIP/2.0/UDP 10.192.117.6:5084;branch=z9hG4bKfb0b.dc0ab912000000000000000000000000.0 To: sip:369@sip.osp.com;tag=3c8f91806f39ae2b From: sip:+336111111111@fqfn-incoming.com;tag=b291f786bf408b0f265ca920d0aa6550 CSeq: 1 INVITE Call-ID: 7435065-b67a4410e25bc515 Server: test#4011 Content-Length: 0
=================>
<==[384 bytes]==[2024-11-14 19:03:58.605263] 10.192.117.6:5084 => 10.192.117.6:5030 ==== ACK sip:369@sip.osp.com SIP/2.0 Via: SIP/2.0/UDP 10.192.117.6:5084;branch=z9hG4bKfb0b.dc0ab912000000000000000000000000.0 To: sip:369@sip.osp.com;tag=3c8f91806f39ae2b From: sip:+336111111111@fqfn-incoming.com;tag=b291f786bf408b0f265ca920d0aa6550 CSeq: 1 ACK Call-ID: 7435065-b67a4410e25bc515 Max-Forwards: 70 Content-Length: 0