Can I use a multi-line PRI telephone system?

With PRI, you normally connect the lines to a PBX system. So as long as the PBX system supports IP extentions, Voicent software can use these PRI lines through the PBX system. Basically, you creates SIP extensions on the PBX system, then configure Voicent software to use these SIP extensions. For more configuration details, please see Setup Voicent to Use Your PBX System

You can always test the free fully featured shareware version avalible here