We are trying to use the Impact Fax Broadcasting program using our internet phone system RingCentral. In the past, we used a land phone line plugged into the back of the computer, but we have changed offices and the new one uses the RingCentral VoIP system. The computer is connected to a Linksys E1000 router via ethernet, and the router is then connected to an Actiontec M1000 modem, which is then connected to the phone line from the wall.
The Fax Broadcast will work with VoIP lines if the VoIP line is fax grade. Most VoIP service providers, can provide a fax grade line on request or a device to be used with analog fax boards. Vonage provides fax grade VoIP lines for an extra fee.
Developer Support Team