Home » Cisco » 400-051 » Which out-of-dialog SIP OPTIONS ping response put dial-peer tag 1111 into its current operational state?
Refer to the exhibit.
Which out-of-dialog SIP OPTIONS ping response put dial-peer tag 1111 into its current operational state?
A. 501 Not Implemented
B. 504 Server Time-out
C. 408 Request Timeout
D. 486 Busy Here
E. 503 Service Unavailable
Correct Answer: E
Explanation/Reference:
Explanation:
SIP 503 Service Unavailable is commonly seen in a VoIP network when a SIP device (such as a SIP server) is knowingly unable to process a call. Typically when this happens the endpoint that originated the Invite will try the next available host it receives in the SIP Contact header.
