SIP 182 Queued vs 493 Undecipherable
SIP 182 (Queued) is a 1xx Provisional response, while 493 (Undecipherable) 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, 493 means that the request body was encrypted with S/MIME but the server cannot decrypt it. The server may lack the necessary key or certificate.
Mô tả
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.
Khi bạn thấy mã này
In call center or queuing scenarios where the callee is busy but the system holds the call in a queue.
Cách khắc phục
Wait for the call to be dequeued. If queuing is not desired, configure the server to reject calls instead of queuing them.
Mô tả
The request body was encrypted with S/MIME but the server cannot decrypt it. The server may lack the necessary key or certificate.
Khi bạn thấy mã này
When using S/MIME encryption for SIP message bodies and the recipient does not have the corresponding decryption key.
Cách khắc phục
Ensure the recipient has the correct S/MIME certificate and private key. Consider using TLS for transport-layer encryption instead.
Sự khác biệt chính
182 is a 1xx Provisional response, while 493 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 493: The request body was encrypted with S/MIME but the server cannot decrypt it. The server may lack the necessary key or certificate.
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 493 when when using S/MIME encryption for SIP message bodies and the recipient does not have the corresponding decryption key.
Khi nào dùng cái nào
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 493 (Undecipherable): Ensure the recipient has the correct S/MIME certificate and private key. Consider using TLS for transport-layer encryption instead.