Help with Custom Extension on Freepbx 16.

FreePBX Configuration
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1

Hello. I need help with Custom Extension on Freepbx 16.
I need froward call to announcement if extensions in ring groups are not registered.
How i can check it with custom extension?
Thanks.

2

In the ring group at the bottom you set the Destination if no answer to wherever you want the call to go if no extensions can answer the call.

3

If no answer, i used another destination. I need check registered extensions.

4

There’s a method outlined here where you can branch a call based on the device state of a single extension

If you have a list of extensions, you would modify the Asterisk expression to check them all.