A Cisco collaboration engineer is troubleshooting unexpected SIP call disconnect. Which three responses corresponding to the 5xx range? (Choose Three)

SIP 403 'Forbidden' is a 4xx client-error status code, indicating the server understood the request but refuses to authorize it.

SIP 401 'Unauthorized' is a 4xx client-error status code, indicating the client needs to authenticate itself to get the requested response.

SIP 408 'Request Timeout' is a 4xx client-error status code, indicating the server timed out waiting for the request.

SIP 503 'Service Unavailable' indicates the server is temporarily unable to handle the request, often due to overload or maintenance.

SIP 502 'Bad Gateway' means the server, acting as a gateway, received an invalid response from an upstream server.

SIP 500 'Internal Server Error' is a generic error message indicating an unexpected condition on the server when no more specific message is suitable.