Changing major Asterisk version on the fly

Note: Make sure you back up your existing PBX configuration before making any major changes to our PBX

FreePBX has a simple script that lets you change the major Asterisk version that you are using. To change the Asterisk version simply SSH into your PBX (as root) and run:

asterisk-version-switch

On current FreePBX versions, you’ll see a menu like this:

Current version:  Asterisk 22.3.0 is running

	(LTS) = Long Term Support | (EOL) = End of Life | (S) = Standard

	Press 1 for  Asterisk 18 (LTS)
	Press 2 for  Asterisk 18 (Certified)
	Press 3 for  Asterisk 20 (LTS)
	Press 4 for  Asterisk 20 (Certified)
	Press 5 for  Asterisk 21 (S)
	Press 6 for  Asterisk 22 (LTS)

	Press q to exit and not change your Asterisk Version

Choose the Asterisk version you need by pressing the corresponding number. Note that Asterisk 20 is the last version to support chan_sip, so if you choose a newer one, make sure all your endpoints have been migrated.

Once The change has been completed FreePBX will re-write all configuration files and reload Asterisk. This will stop calls for around 5-10 minutes.