SIP 301 Moved Permanently vs 487 Request Terminated
SIP 301 (Moved Permanently) is a 3xx Redirection response, while 487 (Request Terminated) is a 4xx Client Failure response. 301 indicates that the user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header. In contrast, 487 means that the request was terminated by a BYE or CANCEL. The original request was cancelled before it could be completed.
Descripción
The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
Cuándo lo verás
When a user has permanently changed their SIP address. All future calls should be directed to the new URI.
Cómo solucionarlo
Update your address book or routing tables to use the new Contact URI provided in the response.
Descripción
The request was terminated by a BYE or CANCEL. The original request was cancelled before it could be completed.
Cuándo lo verás
When the caller hangs up before the callee answers (CANCEL sent for pending INVITE). This is normal call abandonment.
Cómo solucionarlo
No fix needed — the caller intentionally terminated the request. This is normal behavior.
Diferencias clave
301 is a 3xx Redirection response, while 487 is a 4xx Client Failure response.
SIP 301: The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
SIP 487: The request was terminated by a BYE or CANCEL. The original request was cancelled before it could be completed.
You encounter 301 when when a user has permanently changed their SIP address. All future calls should be directed to the new URI.
You encounter 487 when when the caller hangs up before the callee answers (CANCEL sent for pending INVITE). This is normal call abandonment.
Cuándo usar cada uno
For 301 (Moved Permanently): Update your address book or routing tables to use the new Contact URI provided in the response. For 487 (Request Terminated): No fix needed — the caller intentionally terminated the request. This is normal behavior.