Cisco 400-051 Exam
Refer to the exhibit. The exhibit shows an outgoing SIP 401 response message from Cisco Unified Communications Manager to a SIP VoIP service provider gateway. Which action can the Cisco Unified Communications Manager systems administrator use to change the response to “200 OK”?
- A. Make sure the gateway IP address of the SIP VoIP service provider is defined correctly in Cisco Unified Communications Manager SIP trunk.
- B. Enable OPTIONS ping on Cisco Unified Communications Manager SIP trunk.
- C. Disable OPTIONS ping on Cisco Unified Communications Manager SIP trunk.
- D. Create an SIP response alias to force outgoing 401 messages to “200 OK”.
- E. Disable digest authentication on Cisco Unified Communications Manager SIP trunk.