
SIP Blog - Page 7
SIP method invite re-invite
From the SIP RFC: …This modification can involve changing addresses or ports, adding a media stream, deleting a media stream, and so on. This is accomplished by sending a new INVITE request within the same dialog that established…
Read More »SIP method cancel
From the SIP RFC: The CANCEL request, as the name implies, is used to cancel a previous request sent by a client. Specifically, it asks the UAS to cease processing the request and to generate an error response…
Read More »SIP method options
From the SIP RFC: The SIP method OPTIONS allows a UA to query another UA or a proxy server as to its capabilities. This allows a client to discover information about the supported methods, content types, extensions, codecs,…
Read More »SIP redirect server
From the SIP RFC: Redirect Server: A redirect server is a user agent server that generates 3xx responses to requests it receives, directing the client to contact an alternate set of URIs. In some architectures it may be…
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