How to Apply a Pre-Call Announcement to All Extensions at Once

I have around 200 extensions. I want all of them to play an announcement before calling another person. But if I do this manually for each extension, it will be very tiring work. I want it to be applied to all of them at once, and when I want, I should be able to disable the announcement for all of them at once.
How should I do this?

Multi-posted as How to Apply a Pre-Call Announcement to All Extensions at Once - Asterisk Dialplan - Asterisk Community and already answered there. It failed to mention that this was for FreePBX.

Is this the same topic you posted before under a a MUSIC ON HOLD question ? It looks identical in your description of having 200+ extensions and not wanting to update them but playing music on hold.

Yes, This is almost the same question you asked at : How to manage Music on Hold for all Extensions?

Sorry, but you need to better explain what you are trying to do, and stay focused, and better explain the problems or complications you are running into and give us more feedback other than “it not worked”

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