SIP 302 Moved Temporarily vs 606 Not Acceptable
SIP 302 (Moved Temporarily) is a 3xx Redirection response, while 606 (Not Acceptable) is a 6xx Global Failure response. 302 indicates that the callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests. In contrast, 606 means that the user's agent was contacted successfully but some aspects of the session description (SDP) are not acceptable. Unlike 488, this is a global failure — no other server can satisfy this request.
Description
The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
Quand vous le voyez
When a user is temporarily reachable at a different location, such as when traveling or using a different device.
Comment résoudre
Redirect the current call to the Contact URI provided, but keep the original URI for future requests.
Description
The user's agent was contacted successfully but some aspects of the session description (SDP) are not acceptable. Unlike 488, this is a global failure — no other server can satisfy this request.
Quand vous le voyez
When the callee definitively cannot accept any of the offered media types or codecs. Different from 488 which is location-specific.
Comment résoudre
Check the Warning header or response body for which session parameters are unacceptable. Modify the SDP offer to use compatible codecs and media types.
Différences clés
302 is a 3xx Redirection response, while 606 is a 6xx Global Failure response.
SIP 302: The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
SIP 606: The user's agent was contacted successfully but some aspects of the session description (SDP) are not acceptable. Unlike 488, this is a global failure — no other server can satisfy this request.
You encounter 302 when when a user is temporarily reachable at a different location, such as when traveling or using a different device.
You encounter 606 when when the callee definitively cannot accept any of the offered media types or codecs. Different from 488 which is location-specific.
Quand utiliser lequel
For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests. For 606 (Not Acceptable): Check the Warning header or response body for which session parameters are unacceptable. Modify the SDP offer to use compatible codecs and media types.