SIP 301 Moved Permanently vs 606 Not Acceptable
SIP 301 (Moved Permanently) is a 3xx Redirection response, while 606 (Not Acceptable) is a 6xx Global Failure response. 301 indicates that the user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header. 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.
Beschreibung
The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
Wann Sie es sehen
When a user has permanently changed their SIP address. All future calls should be directed to the new URI.
Wie man es behebt
Update your address book or routing tables to use the new Contact URI provided in the response.
Beschreibung
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.
Wann Sie es sehen
When the callee definitively cannot accept any of the offered media types or codecs. Different from 488 which is location-specific.
Wie man es behebt
Check the Warning header or response body for which session parameters are unacceptable. Modify the SDP offer to use compatible codecs and media types.
Wesentliche Unterschiede
301 is a 3xx Redirection response, while 606 is a 6xx Global Failure response.
SIP 301: The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
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 301 when when a user has permanently changed their SIP address. All future calls should be directed to the new URI.
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.
Wann welchen verwenden
For 301 (Moved Permanently): Update your address book or routing tables to use the new Contact URI provided in the response. 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.