Yeah. It works. There's some specific admin/different ways of doing things that's documented - like on a J phone you don't get a login and a logout key, it's a toggle, stuff like that.

Where can I find specific implementation?

We have a few working on 9641GS. They seem to work. The only thing that I am unable to figure out is how to status the station. Looked all over Session Manager but can't find anything. When you do it from CM you can't see if the phone is on call forward or send all calls is activated. You can see what state they are in the skills though. Not sure if anyone has figured out how to do this but would love to know.

https://downloads.avaya.com/css/P8/documents/10103...

That's a good start!