tcpdump: listening on fxp1, link-type EN10MB (Ethernet), capture size 65535 bytes
13:28:12.020631 IP (tos 0xb8, ttl  64, id 29150, offset 0, flags [none], proto: UDP (17), length: 876) 10.30.0.201.5060 > 10.30.0.1.5060: SIP, length: 848
        INVITE sip:102@10.30.0.1:5060;user=phone SIP/2.0
        Via: SIP/2.0/UDP 10.30.0.201;branch=z9hG4bKca812dbb5FBFF96C
        From: "Richard Metivier" <sip:201@10.30.0.1>;tag=70A67B29-25E620E0
        To: <sip:102@10.30.0.1;user=phone>
        CSeq: 1 INVITE
        Call-ID: 4e904855-55e6decf-37748ab6@10.30.0.201
        Contact: <sip:201@10.30.0.201>
        Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
        User-Agent: PolycomSoundPointIP-SPIP_501-UA/1.6.7.0098
        Supported: 100rel,replaces
        Allow-Events: talk,hold,conference
        Max-Forwards: 70
        Content-Type: application/sdp
        Content-Length: 246

        v=0
        o=- 978314400 978314400 IN IP4 10.30.0.201
        s=Polycom IP Phone
        c=IN IP4 10.30.0.201
        t=0 0
        a=sendrecv
        m=audio 10036 RTP/AVP 0 8 18 101
        a=rtpmap:0 PCMU/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:18 G729/8000
        a=rtpmap:101 telephone-event/8000

13:28:12.020980 IP (tos 0xbf,CE, ttl  64, id 43578, offset 0, flags [none], proto: UDP (17), length: 390) 10.30.0.1.5060 > 10.30.0.201.5060: SIP, length: 362
        SIP/2.0 404 Not Found
        Via: SIP/2.0/UDP 10.30.0.201;branch=z9hG4bKca812dbb5FBFF96C
        From: "Richard Metivier" <sip:201@10.30.0.1>;tag=70A67B29-25E620E0
        To: <sip:102@10.30.0.1;user=phone>;tag=3b97142eb5709fa977390862b1dc7b6a.734c
        CSeq: 1 INVITE
        Call-ID: 4e904855-55e6decf-37748ab6@10.30.0.201
        Server: OpenSER (1.2.0-notls (i386/freebsd))
        Content-Length: 0


13:28:12.059028 IP (tos 0xb8, ttl  64, id 29152, offset 0, flags [none], proto: UDP (17), length: 558) 10.30.0.201.5060 > 10.30.0.1.5060: SIP, length: 530
        ACK sip:102@10.30.0.1:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.30.0.201;branch=z9hG4bKca812dbb5FBFF96C
        From: "Richard Metivier" <sip:201@10.30.0.1>;tag=70A67B29-25E620E0
        To: <sip:102@10.30.0.1;user=phone>;tag=3b97142eb5709fa977390862b1dc7b6a.734c
        CSeq: 1 ACK
        Call-ID: 4e904855-55e6decf-37748ab6@10.30.0.201
        Contact: <sip:201@10.30.0.201>
        Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
        User-Agent: PolycomSoundPointIP-SPIP_501-UA/1.6.7.0098
        Max-Forwards: 70
        Content-Length: 0