Any wayto upgrade a freepbx 16 to 17?

[musa116 (Moussa)]

I think you have to change all extensions and trunks look at this link:

New tool to assist converting from SIP to PJSIP | FreePBX - Let Freedom Ring

There have been more discussions here:

Backup+Restore from SNG7 from 16.0.40.7 to new Debian 12 with up2date install non working trunks?

I recommend changing that to PJSIP in advanced settings. Use fwconsole convert2pjsip to convert your extensions from chan_sip to pjsip. And rebuild your trunks as pjsip. It sounds like a lot but should probably take very little time.