SIP 182 Queued vs 400 Bad Request
SIP 182 (Queued) is a 1xx Provisional response, while 400 (Bad Request) is a 4xx Client 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, 400 means that the request could not be understood due to malformed syntax. The client should not repeat the request without modifications.
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 request could not be understood due to malformed syntax. The client should not repeat the request without modifications.
เมื่อคุณพบเห็น
When the SIP message has syntax errors, missing required headers, or invalid header values.
วิธีแก้ไข
Review the SIP message for syntax errors. Check required headers (To, From, Call-ID, CSeq, Via, Max-Forwards) and ensure proper formatting.
ความแตกต่างหลัก
182 is a 1xx Provisional response, while 400 is a 4xx Client 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 400: The request could not be understood due to malformed syntax. The client should not repeat the request without modifications.
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 400 when when the SIP message has syntax errors, missing required headers, or invalid header values.
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 400 (Bad Request): Review the SIP message for syntax errors. Check required headers (To, From, Call-ID, CSeq, Via, Max-Forwards) and ensure proper formatting.