It is pretty frustrating learning FreePBX with almost nonexistent documentation. Wiki on Sangoma site is more placeholder that having useful content.
Searching Internet gives lots of links to resources that are obsolete and most of them actually lead to FreePBX wiki, but it seems it was old site that does not exist any more.
Even most of posts of this forum contain links to resources that do not exist, primarily old Wiki site.
Is there some actually useful documentation we can use to learn?
This is a very common problem; unfortunately the documentation has been poor for quite some time. I would say that the most helpful resource would be this community, though you shouldn’t have to rely on that in a perfect world.
Have you tried this:
Or this ?: Help.sangoma.com AI updates
The old wiki used to be pretty good for reference material, but it was destroyed out of the blue for reasons unknown. The information was transferred at an agonizingly slow rate to a new wiki. (Which is why all the links to the old one are broken.) Not even sure if all the articles / pages have made it over to the new site, even though it’s been probably a year or more since the original was broken. Really wish I’d have known it was going to be destroyed ahead of time - would’ve crawled the site and downloaded the entire thing so that I would have the information that used to be in it. 
No use lamenting what could’ve been though - just have to move forward with whatever resources are available.
As far as learning FreePBX, I suggest snagging Chris Sherwood’s video series on utoob (he posts as Crosstalk Solutions). His videos takes you through everything step-by-step, Chris is easy to understand, and explains things very well.
Have you tried the Wayback Machine?
“…all of the old PBX wiki content is currently present and available via the local site search.”
Following last week’s upgrades, the content - including updated information eg. for v17 - is also now available via an AI-assisted search at help.sangoma.com, with summary answers at the top of the search and deep links to source materials.
check this out…
Do you really expect any non artificially intelligent entity to accept this crap?
Try this. While an older version, this is what I used to start to learn how to do most of what I know today.
FreePBX101 from Cross Talk Solutions
Dude! Never thought of using Wayback Machine to get it… and that’s an EXCELLENT idea - thank you @david55 !!! (Think I just found a new project that just skipped to the top of the list of what I’m going to be doing tomorrow. 
)
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I have checked out the ai site a couple times and like most ai powered stuff, have found that it generates far more garbage than help. (Could tell right away when staples enabled ai on their site… I searched for ‘17" laptop’ one Thanksgiving coming home from dinner at a family member’s house and first hits were garbage bags, candy, and drafting pencils. 
) IMO, ai is more something companies shove down our throats whether or not it works, just to say they have/use ai. From what I’ve seen, the non-ai repositories of information work better >98% of the time.
Would have been far better to leave the existing wiki & build the ai layer on top so that a- links all over the forums / internet don’t break & b- people could use what works best for them. (Or at least copy it & slowly replace pages with symbolic links that forward visitors to the new URLs.) Had some serious issues a couple months after the old wiki got nuked & stupidly hadn’t printed or saved the articles - someone at Sangoma (now gone 
) was nice enough to manually copy / paste the information to the new one for me so I could get the commands I needed to save my servers. Completely effed up formatting, but at least I got the information.
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@HawaiianHopeOrg ‘s link is one of Chris’ videos I mentioned - also taught me a lot and is why I felt comfortable enough to tell my boss I could handle our phones myself and invested ~$10k in PBXact. (Maybe I should be cursing Chris instead? 
) With how YT has been, I suggest downloading the series so you’ll have them.
I agree. I feel odd that I have to ask for help for every single issue I stumble on, even dumb ones, because there is no documentation that could help.
Luckily there are good and patient people here that are willing to help.
Except there is documentation as it has been pointed out.
I already watched whole series. It was really helpful.
To bad it was not continued. It stopped just when it got to advanced stuff.
That was a joke, right? All I get when I click on a tab is " * There’s nothing in this folder yet."
What tab? None of the of the links or menus work? Are you looking in the right place?
Oh I see, you clicked on like the first few and ignored the rest. Here’s some direct links to those in the menu.