SIP 182 Queued vs 437 Unsupported Certificate
SIP 182 (Queued) is a 1xx Provisional response, while 437 (Unsupported Certificate) 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, 437 means that the server was unable to validate the certificate referenced by the Identity-Info header. The certificate may be self-signed or from an untrusted CA.
説明
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.
このコードが表示される場合
In call center or queuing scenarios where the callee is busy but the system holds the call in a queue.
解決方法
Wait for the call to be dequeued. If queuing is not desired, configure the server to reject calls instead of queuing them.
説明
The server was unable to validate the certificate referenced by the Identity-Info header. The certificate may be self-signed or from an untrusted CA.
このコードが表示される場合
When the signing certificate for SIP Identity validation is not trusted by the verifying server.
解決方法
Use a certificate from a trusted Certificate Authority. Ensure the certificate chain is complete and not expired.
主な違い
182 is a 1xx Provisional response, while 437 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 437: The server was unable to validate the certificate referenced by the Identity-Info header. The certificate may be self-signed or from an untrusted CA.
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 437 when when the signing certificate for SIP Identity validation is not trusted by the verifying server.
どちらをいつ使うか
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 437 (Unsupported Certificate): Use a certificate from a trusted Certificate Authority. Ensure the certificate chain is complete and not expired.