SIP 182 Queued vs 606 Not Acceptable
SIP 182 (Queued) is a 1xx Provisional response, while 606 (Not Acceptable) is a 6xx Global Failure response. 182 indicates that the called party is temporarily unavailable but the server has decided to queue the call rather than reject it. The call will be attempted when the callee becomes available. 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.
คำอธิบาย
The called party is temporarily unavailable but the server has decided to queue the call rather than reject it. The call will be attempted when the callee becomes available.
เมื่อคุณพบเห็น
In call center or queuing scenarios where the callee is busy but the system holds the call in a queue.
วิธีแก้ไข
Wait for the call to be dequeued. If queuing is not desired, configure the server to reject calls instead of queuing them.
คำอธิบาย
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.
เมื่อคุณพบเห็น
When the callee definitively cannot accept any of the offered media types or codecs. Different from 488 which is location-specific.
วิธีแก้ไข
Check the Warning header or response body for which session parameters are unacceptable. Modify the SDP offer to use compatible codecs and media types.
ความแตกต่างหลัก
182 is a 1xx Provisional response, while 606 is a 6xx Global Failure response.
SIP 182: The called party is temporarily unavailable but the server has decided to queue the call rather than reject it. The call will be attempted when the callee becomes available.
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 182 when in call center or queuing scenarios where the callee is busy but the system holds the call in a queue.
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.
ควรใช้อันไหนเมื่อไร
For 182 (Queued): Wait for the call to be dequeued. If queuing is not desired, configure the server to reject calls instead of queuing them. 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.