Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 130

A company is experiencing an issue where calls from the Cisco UCM via Cisco Unified Border Element to the ITSP fail with a “500 server internal error” right after a 183 session in progress is sent back from the ITSP. What must be enabled to resolve the issue?

Answer options

• A. delayed offer on Cisco UCM
• B. early offer at the CUBE
• C. delayed offer on CUBE
• D. early offer at the ITSP

Correct answer: B

Explanation

Enabling the early offer at the CUBE allows the CUBE to send the session description in the initial INVITE, which helps maintain compatibility with the ITSP's expectations. The other options, such as delayed offers, do not address the specific signaling requirements of the ITSP, which is crucial for successful call establishment.