You have to tell the phone system that a mailbox exists in the voice mail system, and to send unanswered calls there.

This is done through "coverage". There are 30 different coverage groups in Merlin systems, and it could be any one of them. However the most commonly used coverage group for voice mail is number 30.

Try this if you are familiar with programming the phone system

Menu
System Program
Exit
Extensions
More
Coverage
30
Enter
(Extension Number)
Enter
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