These top business phone system providers are our picks for small businesses looking for a platform to stay connected with employees, partners, and customers.

The primary IP telephony signaling protocols are H.323, SIP and MGCP/MEGACO. There are also proprietary protocols; for example, Cisco's Skinny is widely used. See IP telephony. THIS DEFINITION IS ...

The relative parity of PBX feature sets across providers is also contributing ... of voice-centric hosted Internet protocol (IP) telephony providers. Collaboration-centric decision-making in ...

The terms "IP telephony" and "voice over IP" (VoIP) are synonymous. However, the term VoIP is widely used for the actual services offered (see VoIP for details), while IP telephony often refers to ...

VoIP and IP telephony allows PC users to make phone calls over the Internet or other packet networks via gateways and standard telephones. VoIP is an abbreviation for voice over Internet protocol.