How to build a keep alive on asterisk (freePBX)?

Hi, I’m new on Asterisk and I am working on a server on asterisk 18 with some extensions. One of them is a main extension for us in wich we can see all reachable extensions. How should I build a keep alive correctly? I wish that when an extension is unreachable, the server notifies to our main extension. I should use AMI or I should work on extensions_custom.conf ? Help!

This forum is for questions about raw Asterisk. Asterisk doesn’t have an extension_custom.conf and uses the term “extension” in a different way from FreePBX. You probably want

I think you will need AMI to monitor, but there are various ways of making the calls.

Thanks! I wrote there too. I’m working with AMI now.

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