Something

Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        [Resent Packet: True]
        [Suspected resend of frame: 10]
    Message Header
        Via: SIP/2.0/UDP 64.251.19.190;branch=z9hG4bKd70b.b52a4f32.0;received=64.251.19.190
            Transport: UDP
            Sent-by Address: 64.251.19.190
            Branch: z9hG4bKd70b.b52a4f32.0
            Received: 64.251.19.190
        Via: SIP/2.0/UDP 64.251.19.147:5060;branch=z9hG4bK16295d2c;rport=5060
            Transport: UDP
            Sent-by Address: 64.251.19.147
            Sent-by port: 5060
            Branch: z9hG4bK16295d2c
            RPort: 5060
        Record-Route: <sip:64.251.19.190;lr;ftag=as087bb765>
        From: "Leif Madsen" <sip:proxy_server@64.251.19.147>;tag=as087bb765
            SIP Display info: "Leif Madsen"
            SIP from address: sip:proxy_server@64.251.19.147
            SIP tag: as087bb765
        To: <sip:lmadsen5#lmentinc@switch1-mia.mixnetworks.net>;tag=as47ed4bbc
            SIP to address: sip:lmadsen5#lmentinc@switch1-mia.mixnetworks.net
            SIP tag: as47ed4bbc
        Call-ID: 3ce137fc5101ef3400c2a6ea3cebf05c@64.251.19.147
        CSeq: 102 INVITE
            Sequence Number: 102
            Method: INVITE
        User-Agent: Asterisk PBX
        Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
        Supported: replaces
        Contact: <sip:s@74.100.134.250>
            Contact Binding: <sip:s@74.100.134.250>
                URI: <sip:s@74.100.134.250>
                    SIP contact address: sip:s@74.100.134.250
        Content-Type: application/sdp
        Content-Length: 242
    Message body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): root 7413 7413 IN IP4 74.100.134.250
                Owner Username: root
                Session ID: 7413
                Session Version: 7413
                Owner Network Type: IN
                Owner Address Type: IP4
                Owner Address: 74.100.134.250
            Session Name (s): session
            Connection Information (c): IN IP4 74.100.134.250
                Connection Network Type: IN
                Connection Address Type: IP4
                Connection Address: 74.100.134.250
            Time Description, active time (t): 0 0
                Session Start Time: 0
                Session Stop Time: 0
            Media Description, name and address (m): audio 13852 RTP/AVP 0 101
                Media Type: audio
                Media Port: 13852
                Media Proto: RTP/AVP
                Media Format: ITU-T G.711 PCMU
                Media Format: 101
            Media Attribute (a): rtpmap:0 PCMU/8000
                Media Attribute Fieldname: rtpmap
                Media Format: 0
                MIME Type: PCMU
            Media Attribute (a): rtpmap:101 telephone-event/8000
                Media Attribute Fieldname: rtpmap
                Media Format: 101
                MIME Type: telephone-event
            Media Attribute (a): fmtp:101 0-16
                Media Attribute Fieldname: fmtp
                Media Format: 101 [telephone-event]
                Media format specific parameters: 0-16
            Media Attribute (a): silenceSupp:off - - - -
                Media Attribute Fieldname: silenceSupp
                Media Attribute Value: off - - - -
            Media Attribute (a): ptime:20
                Media Attribute Fieldname: ptime
                Media Attribute Value: 20
            Media Attribute (a): sendrecv




Session Initiation Protocol
    Request-Line: ACK sip:s@74.100.134.250 SIP/2.0
        Method: ACK
        [Resent Packet: False]
    Message Header
        Record-Route: <sip:64.251.19.190;lr;ftag=as087bb765>
        Via: SIP/2.0/UDP 64.251.19.190;branch=z9hG4bKd70b.b52a4f32.2
            Transport: UDP
            Sent-by Address: 64.251.19.190
            Branch: z9hG4bKd70b.b52a4f32.2
        Via: SIP/2.0/UDP 64.251.19.147:5060;branch=z9hG4bK79b473b9;rport=5060
            Transport: UDP
            Sent-by Address: 64.251.19.147
            Sent-by port: 5060
            Branch: z9hG4bK79b473b9
            RPort: 5060
        From: "Leif Madsen" <sip:proxy_server@64.251.19.147>;tag=as087bb765
            SIP Display info: "Leif Madsen"
            SIP from address: sip:proxy_server@64.251.19.147
            SIP tag: as087bb765
        To: <sip:lmadsen5#lmentinc@switch1-mia.mixnetworks.net>;tag=as47ed4bbc
            SIP to address: sip:lmadsen5#lmentinc@switch1-mia.mixnetworks.net
            SIP tag: as47ed4bbc
        Contact: <sip:proxy_server@64.251.19.147>
            Contact Binding: <sip:proxy_server@64.251.19.147>
                URI: <sip:proxy_server@64.251.19.147>
                    SIP contact address: sip:proxy_server@64.251.19.147
        Call-ID: 3ce137fc5101ef3400c2a6ea3cebf05c@64.251.19.147
        CSeq: 102 ACK
            Sequence Number: 102
            Method: ACK
        User-Agent: MixNetworks SWITCH-MIA08
        Max-Forwards: 69
        Remote-Party-ID: "Leif Madsen" <sip:proxy_server@64.251.19.147>;privacy=off;screen=no
        Content-Length: 0
        P-hint: rr-enforced