Cut Costs, Not Profits with the 3CX Software Based Phone System. Using Two Port Supports SIP Trunk Telephone lines in the 3CX, Make calls from anywhere on you Android, iPhone, Tablet, Mac, and Windows Device. Local Calling in the US and Canada for only $23. per line. Download a free copy of the 3CX PBX to try it out! Click on the 3CX Partner icon to enter their site. Make sure to call Two Port Support, LLC for more information on purchasing and installation. Call Today!