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Calls failling from Mitel phones to Office Communicator 2007 RRS feed

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    We've setup a Mitel system to OCS/Exchange UM. Exchange UM is working ok, bothway.

    The mediation server integration (SIP trunk from Mitel to mediation server) is not working properly. Calls from the OC softphone to a Mitel phone work ok, BUT calls from a Mitel phone to the OC softphone fail?

     

    Mitel system: 192.168.1.64

    OCS server: 192.168.1.62

    Mediation server: 192.168.1.66

    IP phone: 2003

    OC client: 4000 (in ADS setup as tel:+4000)

     

    Some trace info on the call from OC client to IP phone:

    INVITE sip:+2003@192.168.1.64;user=phone SIP/2.0
    FROM: <sipTongue Tiedoftphone@demo.lan>;epid=329B45BE68;tag=0895c26e7
    TO: <sip:+2003@192.168.1.64;user=phone>
    CSEQ: 22 INVITE
    CALL-ID: c94adf01-8224-4f09-9d96-6fec17427cb9
    MAX-FORWARDS: 70
    VIA: SIP/2.0/TCP 192.168.1.66:1517;branch=z9hG4bK2eb93781
    CONTACT: <sip:mitelocs4.demo.lan:5060;transport=Tcp;maddr=192.168.1.66;ms-opaque=1afdd1f22931fe18>
    CONTENT-LENGTH: 302
    SUPPORTED: 100rel
    USER-AGENT: RTCC/3.0.0.0 MediationServer
    CONTENT-TYPE: application/sdp; charset=utf-8
    ALLOW: UPDATE
    ALLOW: Ack, Cancel, Bye,Invite

    Below the trace on the call that fails from IP phone 2003 to OC client 4000

    The invite piece of the trace:

    INVITE sip:+4000@192.168.1.66:5060;transport=tcp SIP/2.0
    Via: SIP/2.0/TCP 192.168.1.64:5060;branch=z9hG4bK508309936-59782244
    Max-Forwards: 70
    Allow: INVITE,BYE,CANCEL,ACK,INFO,PRACK,COMET,OPTIONS,SUBSCRIBE,NOTIFY,MESSAGE,REFER,REGISTER,UPDATE
    Supported: timer,replaces
    From: "G.Borsboom" <sip:+2003@192.168.1.64>;tag=0_508309936-59782245
    To: <sip:+4000@192.168.1.66>
    Call-ID: 508309936-59782243@192.168.1.64
    CSeq: 1 INVITE
    Contact: "G.Borsboom" <sip:+2003@192.168.1.64:5060;transport=tcp>
    Content-Type: application/sdp
    User-Agent: Mitel-3300-ICP 8.0.7.16_2
    Content-Length: 268

     

    Than we get the error from mediation server:

    SIP/2.0 400 Invalid Contact information
    FROM: "G.Borsboom"<sip:+2003@192.168.1.64>;tag=0_508309936-59782245
    TO: <sip:+4000@192.168.1.66>;tag=61e7c82c6
    CSEQ: 1 INVITE
    CALL-ID: 508309936-59782243@192.168.1.64
    VIA: SIP/2.0/TCP 192.168.1.64:5060;branch=z9hG4bK508309936-59782244
    CONTENT-LENGTH: 0
    SERVER: RTCC/3.0.0.0 MediationServer

    I know there are a lot of things to check, on which we tried numerous things on the SIP trunk, mediation setup, voice properties etc. Does someone have any idea on what we could check to get around this? The OC client has number +4000.

     

    Any help appreciated.

    Thursday, January 17, 2008 7:09 PM