Refer to the exhibit.

When users press the “messages” button on their IP phones to check voice mail, they are hearing a
busy signal. What is causing the issue?

A.
The Directory Number field is misconfigured.

B.
The Port Name field is misconfigured.

C.
The Device Name Prefix field is misconfigured.

D.
The Calling Search Space field is misconfigured.

E.
The Partition field is misconfigured.