No.     Time        Source                Destination           Protocol Info
    945 23.739312   192.168.1.15          192.168.1.10          SIP      Status: 200 OK    (1 bindings)

Frame 945 (360 bytes on wire, 360 bytes captured)
Linux cooked capture
Internet Protocol, Src: 192.168.1.15 (192.168.1.15), Dst: 192.168.1.10 (192.168.1.10)
User Datagram Protocol, Src Port: sip (5060), Dst Port: sip (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
    Message Header
        Via: SIP/2.0/UDP 192.168.1.10;branch=z9hG4bK87461228c4133a6f
        From: <sip:+41215501111@192.168.1.15>;tag=a5870404e4bd88ff
        To: <sip:+41215501111@192.168.1.15>
        Contact: <sip:+41215501111@192.168.1.10>
        Call-ID: 25e54494742378e1@192.168.1.10
        CSeq: 101 REGISTER
        Server: PrimiSIP
        Content-Length: 0