SIP fails

Session Initiation Protocol
    Request-Line: INVITE sip:[email protected] SIP/2.0
        Method: INVITE
        Request-URI: sip:[email protected]
            Request-URI User Part: 3000
            Request-URI Host Part: pbx.my-domain
        [Resent Packet: False]
    Message Header
        Via: SIP/2.0/UDP 10.0.1.6:5060;rport;branch=z9hG4bKPj16a58c1b-7ba7-4114-abd7-292e82c00e06
            Transport: UDP
            Sent-by Address: 10.0.1.6
            Sent-by port: 5060
            RPort: rport
            Branch: z9hG4bKPj16a58c1b-7ba7-4114-abd7-292e82c00e06
        Max-Forwards: 70
        From: <sip:[email protected]>;tag=19110468-6a56-4206-967d-00849ab9bd11
            SIP from address: sip:[email protected]
                SIP from address User Part: 2000
                SIP from address Host Part: pbx.my-domain
            SIP tag: 19110468-6a56-4206-967d-00849ab9bd11
        To: <sip:[email protected]>
            SIP to address: sip:[email protected]
                SIP to address User Part: 3000
                SIP to address Host Part: pbx.my-domain
        Contact: <sip:[email protected]:5060>
            Contact Binding: <sip:[email protected]:5060>
                URI: <sip:[email protected]:5060>
                    SIP contact address: sip:[email protected]:5060
        Call-ID: 85766e83-44df-4632-b426-0ad4b64910ff
        CSeq: 4630 INVITE
            Sequence Number: 4630
            Method: INVITE
        Allow: PRACK, SUBSCRIBE, NOTIFY, REFER, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, REGISTER, O$
        Supported: replaces, 100rel
        Content-Type: application/sdp
        Content-Length:   298