No.     Time        Source                Destination           Protocol Info
   7550 0.030716    111.222.333.100         111.222.333.132         SIP      Request: ACK sip:111.222.333.132

Frame 7550 (703 bytes on wire, 703 bytes captured)
Linux cooked capture
Internet Protocol, Src: 111.222.333.100 (111.222.333.100), Dst: 111.222.333.132 (111.222.333.132)
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: ACK sip:111.222.333.132 SIP/2.0
    Message Header
        From: "012345678" <sip:012345678@gw.domain.at:5060;user=phone>;tag=ds-c6d-4135d6bb59c3b
        To: <sip:+43720123456@111.222.333.132:5060;user=phone>;tag=0277900c
        Call-ID: 48997948-1dd2-11b2-ba18-d21e7ec28d30@ot1-1
        CSeq: 21932 ACK
        Content-Length: 0
        Route: <sip:111.222.333.130:5084;lr>
        Route: <sip:111.222.333.129;lr;ftag=ds-c6d-4135d6bb59c3b>
        Route: <sip:0720620001@111.222.333.129:5060;x-orig=192.168.0.65:8864;x-orig-nat=192.168.0.65:8864;rinstance=5b57cca07d0b573c>
        Max-Forwards: 70
        Via: SIP/2.0/UDP 111.222.333.100:5060;branch=z9hG4bK489a5d0e-1dd2-11b2-bbdc-cf24c8f139cb
        Contact: <sip:CallAgent@gw.domain.at;transport=udp>

No.     Time        Source                Destination           Protocol Info
   7551 0.000305    111.222.333.132         111.222.333.130         SIP      Request: ACK sip:0720620001@111.222.333.129:5060;x-orig=192.168.0.65:8864;x-orig-nat=192.168.0.65:8864;rinstance=5b57cca07d0b573c

Frame 7551 (892 bytes on wire, 892 bytes captured)
Linux cooked capture
Internet Protocol, Src: 111.222.333.132 (111.222.333.132), Dst: 111.222.333.130 (111.222.333.130)
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 5084 (5084)
Session Initiation Protocol
    Request-Line: ACK sip:0720620001@111.222.333.129:5060;x-orig=192.168.0.65:8864;x-orig-nat=192.168.0.65:8864;rinstance=5b57cca07d0b573c SIP/2.0
    Message Header
        Record-Route: <sip:111.222.333.132;ftag=ds-c6d-4135d6bb59c3b;lr>
        From: "012345678" <sip:012345678@gw.domain.at:5060;user=phone>;tag=ds-c6d-4135d6bb59c3b
        To: <sip:+43720123456@111.222.333.132:5060;user=phone>;tag=0277900c
        Call-ID: 48997948-1dd2-11b2-ba18-d21e7ec28d30@ot1-1
        CSeq: 21932 ACK
        Content-Length: 0
        Route: <sip:111.222.333.129;lr;ftag=ds-c6d-4135d6bb59c3b>
        Route: <sip:0720620001@111.222.333.129:5060;x-orig=192.168.0.65:8864;x-orig-nat=192.168.0.65:8864;rinstance=5b57cca07d0b573c>
        Max-Forwards: 69
        Via: SIP/2.0/UDP 111.222.333.132;branch=0
        Via: SIP/2.0/UDP 111.222.333.100:5060;branch=z9hG4bK489a5d0e-1dd2-11b2-bbdc-cf24c8f139cb
        Contact: <sip:CallAgent@gw.domain.at;transport=udp>
        P-hint: rr-enforced