Cannot configure Polycom VVX 400

[D-Skinner]

I'm trying to configure my Polycom VVX 400 with 3CX hosted in the cloud. I've read and tried the guides available on provisioning and setting up a VVX 400 with 3CX but I'm at a loss since it just won't configure or let me get a line.

Update:

I've managed to get the phone to pull the directory from 3CX but I still can't make ore receive calls to the phone.

 

[JohnS_3CX]

Hi @D-Skinner

These are EOL models so we no longer test them for compatibility against the latest version of 3CX
They have limitations such as no PnP, you need to provision them using DHCP Option 66
Furthermore, for cloud installations, you need an SBC to get them to connect at all.
https://www.3cx.com/sip-phones/polycom-vvx-eol/#h.6chpwcv5ucba


Since they are EOL, we no longer test them for compatibility with the latest version of 3CX so your mileage may vary..

 

[D-Skinner]

I understand that they are EOL, I've now setup an SBC and I'm about to setup a DHCP server as well.

 

[BlueWaterNets]

Under the user / options: make sure to untick the setting "Disallow use of extension outside the LAN (Remote extensions using Direct SIP or STUN will be blocked)". That'll fix you right up. The SBC will work well too if you don't want to open 5060 to the world (if you do, at least ACL it)