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 ...

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 ...

Many companies continue to rely on traditional phone systems, including trunk line telephone setups, to connect with clients ...

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.

Passive hubs do not amplify signals. Active hubs are used like repeaters to extend the cable that connects to a workstation. IP Phone IP phones use telephony technology to transmit calls over an IP ...

Using external microphone and speakers, the D22 supports bidirectional audio, records lip-synchronized sound and sends alarms to the user via integrated SIP-based IP telephony functions. It is powered ...