“Chances are, if you ran a big company you'd have an expensive PBX (private branch exchange) system to juggle extensions, conference calls, and voice mail. For small businesses, a better solution is a virtual PBX, which doesn't require new hardware and is managed via the Web. You get a main number from the hosting company and then route all calls through it to other lines, be it a cell phone or a home-office phone abroad. You can also avoid long-distance charges by routing calls via VoIP.”
PC Magazine 11/01/06
VOIP EMERGENCY SERVICE DISCLAIMER