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  1. #1
    Regular Contributor
    Join Date
    Apr 2007
    Posts
    50

    415 and then 480 response, RTP/AVP media type problem

    Hi,

    I'm developing VOIP client application for S60 devices and having a problem in registering RTP/AVP Media type.INVITE request is failing as i'm getting "415, unsupported media type". I spent good time in googling and found the mentioned below workaround at Nokia technical Library site.


    Workaround:-

    One can use a unique Accept-Contact header (but the same RTP/AVP media type) in the SIP message. Ideally, the Accept-Contact header is a better way of resolving the client as it can always be unique. This will route the messages to the correct applications. The problem that can arise from using this workaround solution is that a non-standard SIP message is being used.

    What i've done:

    Now Accept-Contact header is included in INVITE request and my opaque_data setting in resolve plugin is like this ....

    "<SIP_CLIENT ALLOW_STARTING=\"YES\">\
    <SIP_HEADERS>\
    <ACCEPT value=\"application/sdp\"/>\
    <ACCEPT value=\"SIP/InstantMessage\"/>\
    <ACCEPT-CONTACT value=\"*;media=audio\"/>\
    </SIP_HEADERS>\
    <SDP_LINES>\
    <LINE name=\"m\" value=\"audio 0 RTP/AVP 8\"/>\
    </SDP_LINES>\
    </SIP_CLIENT>"

    The response has been changed to "480 temporary unavailable" please let me know what i'm still missing and how can i able to register media type audio in the media description fied of SDP.



    Thanks in advance,

    Haroon

  2. #2
    Nokia Developer Expert
    Join Date
    Dec 2006
    Location
    Mountain View, CA
    Posts
    197

    Re: 415 and then 480 response, RTP/AVP media type problem

    Element "<LINE name=\"a\" value=\"rtpmap:98 telephone-event/8000/1\"/>\" in the original XML is invalid.
    Here is the corrected XML:

    <SIP_CLIENT ALLOW_STARTING=\"YES\">\
    <SIP_HEADERS>\
    <ACCEPT_CONTACT value=\"*;mobility=mobile;media=audio\"/>\
    <ALLOW_EVENTS value=\"telephone-event\"/>\
    <ACCEPT value=\"audio/basic\"/>\
    <ACCEPT value=\"application/sdp\"/>\
    </SIP_HEADERS>\
    <SDP_LINES>\
    <LINE name=\"m\" value=\"application 0 TCP SIP\"/>\
    <LINE name=\"m\" value=\"audio 30000 RTP/AVP 98\">\
    <MEDIA_ATTRIBUTE value=\"rtpmap:98 telephone-event/8000/1\"/>\
    </LINE>\
    </SDP_LINES>\
    </SIP_CLIENT>

  3. #3
    Regular Contributor
    Join Date
    Apr 2007
    Posts
    50

    Re: 415 and then 480 response, RTP/AVP media type problem

    it is solved here...

    http://discussion.forum.nokia.com/fo...d.php?t=111831


    Haroon Azmat

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