Frame 16 (706 bytes on wire, 706 bytes captured)
Internet Protocol, Src Addr: 10.250.250.201 (10.250.250.201), Dst Addr: 10.250.250.201 (10.250.250.201)
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request line: ACK sip:5550101@10.250.250.201:5060;maddr=10.250.250.201 SIP/2.0
        Method: ACK
    Message Header
        Via: SIP/2.0/UDP 10.250.250.201:5060;branch=d11e86256992d90f966e9df4a6c67951.2
        Via: SIP/2.0/UDP 10.250.250.101:5060
        To: <sip:5550101@vocal2.engdomain.com>;tag=25836
        From: <sip:1017@vocal2.engdomain.com>;tag=2c18069
        Date: Wed, 15 Jan 2003 22:42:55 GMT
        Call-ID: call-1042670570-91@10.250.250.101
        CSeq: 1 ACK
        Proxy-Authorization: Basic VovidaClassXSwitch
        Max-Forwards: 69
        Route: <sip:95550101@10.250.250.201:5065;maddr=10.250.250.201>,<sip:95550101@10.250.250.104;user=phone>
        Contact: sip:1017@10.250.250.101
        Accept-Language: en
        User-Agent: Pingtel/2.1.3 (VxWorks)
        Content-Length: 0