SIP 182 Queued vs 505 Version Not Supported
SIP 182 (Queued) is a 1xx Provisional response, while 505 (Version Not Supported) is a 5xx Server 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, 505 means that the server does not support the SIP protocol version that was used in the request. Currently only SIP/2.0 is standardized.
Descripción
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.
Cuándo lo verás
In call center or queuing scenarios where the callee is busy but the system holds the call in a queue.
Cómo solucionarlo
Wait for the call to be dequeued. If queuing is not desired, configure the server to reject calls instead of queuing them.
Descripción
The server does not support the SIP protocol version that was used in the request. Currently only SIP/2.0 is standardized.
Cuándo lo verás
Extremely rare. Would occur if a client sends a request with a SIP version other than 2.0.
Cómo solucionarlo
Ensure your UA uses SIP/2.0 in the request line. This is the only standardized version.
Diferencias clave
182 is a 1xx Provisional response, while 505 is a 5xx Server 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 505: The server does not support the SIP protocol version that was used in the request. Currently only SIP/2.0 is standardized.
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 505 when extremely rare. Would occur if a client sends a request with a SIP version other than 2.0.
Cuándo usar cada uno
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 505 (Version Not Supported): Ensure your UA uses SIP/2.0 in the request line. This is the only standardized version.