Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 55

The SIP session refresh timer allows the RTP session to stay active during an active call. The Cisco UCM sends either SIP-INVITE or SIP-UPDATE messages in a regular interval of time throughout the active duration of the call. During a troubleshooting session, the engineer finds that the Cisco UCM is sending SIP-UPDATE as the SIP session refresher, and the engineer would like to use SIP-INVITE as the session refresher. What configuration should be made in the Cisco UCM to achieve this?

Answer options

• A. Change Session Refresh Method on the SIP profile to INVITE.
• B. Increase Retry INVITE to 20 seconds on the SIP profile.
• C. Enable Send send-receive SDP in mid-call INVITE on the SIP profile.
• D. Enable SIP Rel1XX Options on the SIP profile.

Correct answer: A

Explanation

The correct answer is A, as changing the Session Refresh Method on the SIP profile to INVITE directly instructs the Cisco UCM to use SIP-INVITE for session refreshing. The other options do not modify the session refresh method and therefore would not achieve the desired result.