Villa Doorstation VTO2311 with IP phone

[taz420nj]

Ok I finally have all the parts together to dump Ring, just got my package from Andy, and I'm having some issues. I have the BI demo running and all the cams talk to it (I'll probably have more setup questions about that later), but I can't get my IP phone (Grandstream GVX3370) to register on the VTO's SIP server. I've found very limited answers online that seem to say it can work, but I've tried I think every combination of settings and it won't register (under account status in the phone WebUI it says 403 forbidden). What do I need to put into each field to make it register? I've messed with FreePBX before but I'd prefer not to do that here if I don't have to. Thanks

 

[taz420nj]

Anybody? Because there's now a plot twist... I had only tried pressing the button on the doorbell, getting the "Calling, please wait" followed by "The call was not answered".... For shiggles I tried dialing 8001 from the phone, and it actually called - and I got audio and video... But the account on the phone still says "Unregistered", the account status still says 403 Forbidden, and the VTH account under the doorbell User List still shows Offline.......