VT White Wholesale Service - Requirements
From VTwiki
In order to utilize VTWhite for Origination and/or Termination services, aside from having basic knowledge of VoIP, you will need the following:
1. SIP compliant PBX. Keep in mind that you do not "register" with VTWhite as you do with ViaTalk. Instead, we authenticate your connection with us based on your IP address. Before signing up, you'll want to make sure your PBX is compatible with IP Authentication.
2. A static IP routed to your PBX - Because this is the only IP address VTWhite will allow traffic to and from.
3. SIP phone, soft phone or an ATA to make calls through your PBX with.

