I had a webinar with Poly and our distributor this morning and they were showing off their new VVX X50 line of phones… I pushed the issue with them about not being certified or supported with FreePBX. They said they are “looking into it”. We shall see.
What’s kind of weird to me is that the Poly Obi ATAs like the Obi300 have zero-touch provisioning through Poly’s PDMS-SP and they work with FreePBX’s EPM. So why not all the other devices and phones that has the same/similar Obi provisioning template?
As far as provisioning friendly phones I’ll first consult the wiki (https://wiki.freepbx.org/display/FPG/Phone+Apps-Supported+Devices) to check if a brand is EPM compatible… and then see if that brand has their own re-direction or zero-touch provisioning service.
I know Sangoma, Mitel/Aastra, Yealink, Konftel, Grandstream, and Snom/Vtech offer such services.
(not sure about the others you mentioned since I don’t have much experience with those brands).
Then lastly PhoneApps (because my clients really see the value add in the PhoneApps module), I looks for PhoneApps supported devices… which leaves Sangoma, Mitel/Aastra and Yealink.
(I wish Digium phones had a redirection or zero-touch provisioning service because those phones are kind of awesome too… fully supported in EPM and you get “free” PhoneApps (via EPM managed DMPA).)