Which statement about the Linux OS for IP Office is true?

Which feature of IP Office is necessary to trigger screen pops, where the caller ID prompts the computer to display a record associated with that number?

When creating a Short Code to connect to a Voicemail Pro start point, which Short Code feature should you use to ensure correct execution?

A customer is running an IP Office 500 V2, one-X Portal, Voicemail Pro, and CCR supporting 50 users, of which 10 are CCR agents. They are currently on software version 8.0 and would like to upgrade to version 9.1.
What application changes will they need to make during the upgrade?

A customer has a requirement to restrict users from dialing international numbers. What is the most efficient way to enforce this policy?