The calling search space was changed for a phone with extension x4827. That phone used a shared line.
What must be done to make that change to all the other devices that use that shared line?

A.
You cannot change a calling search space on a device with a shared line.

B.
All devices using that shared line must have their calling search space changed.

C.
All devices using that shared line must be disconnected from the network and reattached to register the changes.

D.
Nothing needs to be done because a calling search space device change on one device rolls forward to all devices using that shared line.

Explanation:
Page 368 – CIPT Student Guide 3.3
If you change the Calling Search Space, Call Waiting, or Call Forward and Pickup settings on any device that uses the shared line, the changes are applied to all of the devices that use the shared line.