Session Initiation Protocol (SIP) is a communications protocol for controlling voice and video communication sessions . It is most commonly used in Internet telephony, video conferencing, and to send SMS messages over IP networks.
Essentially when referring to SIP phones we are talking on the more commonly known VoIP phones (Phones Over IP network), with SIP being a particular flavor of VoIP.
Sip phones can be either an actual phones or a software solution. An actual phone does not look any different than a regular phone, but is designed to handle calls over the Internet connection instead of a traditional phone lines. It can have both an Internet port (accepting a Ethernet cable) and a standard phone port, or just an Internet port. A software solution essentially allows a personal computer to function as a phone. Either solution requires a good broadband connection.
With TeleBroad you can implement either approach or combine them. Our PBXellent solution is completely software based including software solutions to handle all your calls, voicemails, messages, and faxes from a computer or a mobile device. We also offer user with the added convenience of a variety of hardware phones with range functions to suit all needs.