In 2020 when RedHat took over CentOS, many predicted it was with the intent of destroying it, being derived from RHEL it was a direct competitor, some say those people have been vindicated, as that's exactly what RedHat did, and its short life-span replacement, CentOS Stream, is just another Fedora, this left FreePBX devs in a bind.
Asterisk and FreePBX allow for a myriad of customisations, some of these however need hand editing asterisk files as well as some FreePBX configuring (due to how FreePBX uses its database and overwrites some asterisk files), so some things you just can't entirely do from within FreePBX, or in asterisk (when using FreePBX that is), like set up Lenny, or provide a Weather service.
Not all VoIP or SIP providers, also known as VSP's or Voice Service Providers, are equal. In recent years there has been a number of new VoIP providers appearing to take advantage of the move from POTS to VoIP in the populous areas serviced by NBN, some of these recent ventures claim they have been selling services for years, but it quickly becomes apparent who are honest, and who are full of it.
Before I continue, let me reassure you the UCM's do work, the devices are just restrictive, hardware and configurability wise, one of the most common complaints I hear is with Music On Hold, in our markets, the most popular method is streaming, be it a plug-in radio, or remote stream, and the UCM's can't do it.
(Original post February 14 2021 updated)
By default, ChanSpy, a supervisor function that allows you to monitor
other peoples calls, is enabled and can be used by anyone, yes, anyone, who's phone is logged in to a FreePBX system that has this feature enabled.
Sangoma don't allow you to secure it out of the box, instead, they try sell you some commercial module (that's about AU$145) that allegedly sets a PIN. But you can do it for free!
We all (hopefully) backup our PBX's - our config files, databases, even system audio and logs, some of this can be backed up hourly, daily, or weekly, so in all likelihood, you will have at least two backup processes probably more, but where do you back them up to?
Local storage? It's fair to say nearly everyone uses this, but is that the only place you have them? What if your disks fail? A lot of good those backups are now you can't access them!