No, "unsupported media" generally means that the message content is
not understood by the request recipient.
Here are some relevant RFC3261 sections:
1. If a 415 (Unsupported Media Type) response is received (Section
21.4.13), the request contained media types not supported by the UAS.
The UAC SHOULD retry sending the request, this time only using
content with types listed in the Accept header field in the response,
with encodings listed in the Accept-Encoding header field in the
response, and with languages listed in the Accept-Language in the
response.
2. Assuming the UAS understands any extensions required by the client,
the UAS examines the body of the message, and the header fields that
describe it. If there are any bodies whose type (indicated by the
Content-Type), language (indicated by the Content-Language) or
encoding (indicated by the Content-Encoding) are not understood, and
that body part is not optional (as indicated by the Content-
Disposition header field), the UAS MUST reject the request with a 415
(Unsupported Media Type) response.
3.
21.4.13 415 Unsupported Media Type
The server is refusing to service the request because the message
body of the request is in a format not supported by the server for
the requested method. The server MUST return a list of acceptable
formats using the Accept, Accept-Encoding, or Accept-Language header
field, depending on the specific problem with the content. UAC
processing of this response is described in Section 8.1.3.5.
>>When UAC is request for some codec in the INVITE and none of them is
>>supported by UAS then UAC will get "415" response.
In the case of unsupported codecs, a "488 Not Acceptable Here" should
be used with one of the following "Warnings":
304 Media type not available: One or more media types contained in
the session description are not available.
305 Incompatible media format: One or more media formats contained
in the session description are not available.
Regards,
Attila
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Sarkar,
Uttam
Sent: 12 April 2007 16:16
To: Sambit Pooja; [EMAIL PROTECTED]
Subject: Re: [Sip-implementors] 415 Unsupported media
When UAC is request for some codec in the INVITE and none of them is
supported by UAS then UAC will get "415" response.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Sambit
Pooja
Sent: Thursday, April 12, 2007 11:08 AM
To: [EMAIL PROTECTED]
Subject: [Sip-implementors] 415 Unsupported media
In which scenarios switch can send 415 Unsupported media
Thanx in advance
Sam
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