SIP 200 OK vs 405 Method Not Allowed
SIP 200 (OK) is a 2xx Success response, while 405 (Method Not Allowed) is a 4xx Client Failure response. 200 indicates that the request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully. In contrast, 405 means that the method specified in the Request-Line is not allowed for the address identified by the Request-URI.
Descripción
The request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
Cuándo lo verás
When a call is answered (INVITE 200 OK), a registration succeeds (REGISTER 200 OK), or a subscription is accepted (SUBSCRIBE 200 OK).
Cómo solucionarlo
No fix needed — this is a success response. The caller should send an ACK to complete the three-way handshake for INVITE transactions.
Descripción
The method specified in the Request-Line is not allowed for the address identified by the Request-URI.
Cuándo lo verás
When sending a SIP method (e.g., MESSAGE, PUBLISH) that the server does not support for the target URI.
Cómo solucionarlo
Check the Allow header in the response to see which methods are supported. Use a supported method instead.
Diferencias clave
200 is a 2xx Success response, while 405 is a 4xx Client Failure response.
SIP 200: The request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
SIP 405: The method specified in the Request-Line is not allowed for the address identified by the Request-URI.
You encounter 200 when when a call is answered (INVITE 200 OK), a registration succeeds (REGISTER 200 OK), or a subscription is accepted (SUBSCRIBE 200 OK).
You encounter 405 when when sending a SIP method (e.g., MESSAGE, PUBLISH) that the server does not support for the target URI.
Cuándo usar cada uno
For 200 (OK): No fix needed — this is a success response. The caller should send an ACK to complete the three-way handshake for INVITE transactions. For 405 (Method Not Allowed): Check the Allow header in the response to see which methods are supported. Use a supported method instead.