IP based telephony had been widely adopted by big multinational companies as they realize the advantage of having latest telephony technology in order to keep up with the challenges of the corporate world. The goals of IP based telephony communications system are to improve employee productivity and efficiency, simplify maintenance and reduce costs for the business. Traditional PBX telephony had their advantage, but the advent of internet and networks makes IP based phone systems superior in terms of manageability, lower cost of operational expense, dependable, can be scaled up when the business grows, and provides productive features like unified communications.
Voice over IP (VoIP) is a communications protocol for carrying voice calls and signals over an Internet Protocol network which is made possible though digitization and packet creation of the voice signal. IP Telephony uses VoIP to create a telephone system in which advance features such as advanced call routing, voice mail, barge-in, call recording and call monitoring for contact centers, can be applied.
Commonly used in the describing VoIP products for IP based telephony is SIP. VoIP alone could not provide all the standard for IP based telephony alone. Additional protocols works in line with VoIP to enable IP Based telephony. One of which is Session Initiation Protocol or SIP is a peer-to-peer, multimedia signaling protocol. SIP is ASCII-based and utilizes existing IP protocols like DNS and SDP to provide media setup. SIP has been widely adopted in the VoIP industry due to high interest in its application, and the industry believe that SIP will become the de facto standard for Voice communication.
List of Products offering IP based VoIP are shown below.
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