I have a few hundred VVX phones and I was pretty excited to move these from freepbx systems to 3CX, but as I'm hooking up the first one in the lab I find this page: https://www.3cx.com/sip-phones/polycom-vvx/ with the highlight next being: Limitations Note that these phones can not be used from a remote location or in combination with a 3CX in the cloud. Known limitations of Polycom VVX 101, 201, 300, 301, 311, 400, 401, 410, 411, 500, 501, 600 & 601 are: No PnP Support No STUN Support No SBC Support No Full CTI Support (Make Call Only) Manual DST Support Video possible but not support can be given on this function Distinctive Ringing works only for numbers not listed in directory No Speed Dial (including Profile and Queue status) or Shared Parking function keys This sucks. Specifically the no cloud note and #3, and #8! Any chance this is being worked on? I mean, this definitely isn't a platform limitation on the VVX, it supports various BLF functions with broadsoft, freeswitch, and asterisk. This makes these completely useless with 3CX (especially #8) as not even an on-prem will work. Please tell me this is a dated article and there is some change. These are very very popular phones and I'm inheriting them very often when taking over a Ringcentral or 8x8 site.