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A VoIP phone or IP phone uses voice over IP technologies for placing and transmitting telephone calls over an IP network, such as the Internet. [1] This is in contrast to a standard phone which uses the traditional public switched telephone network (PSTN).
3CX, Inc., is a software development company and developer of the 3CX Phone System. The 3CX Phone System is a software private branch exchange based on the SIP (Session Initiation Protocol) standard to allow calls via the public switched telephone network (PSTN) or via Voice over Internet Protocol (VoIP) services.
A Name Authority Pointer (NAPTR) is a type of resource record in the Domain Name System of the Internet. [1] [2]NAPTR records are most commonly used for applications in Internet telephony, for example, in the mapping of servers and user addresses in the Session Initiation Protocol (SIP).
Bicom Systems began researching and creating telecoms management software in 2003. [4] An Asterisk pioneer, [5] Bicom Systems launched the first ever open standards turnkey telephony system in 2004.
The FreePBX Distro supports a large number of phone models via open-source modules. [ 6 ] [ 7 ] Supported VoIP phone manufacturers include Aastra Technologies , Algo, AND, Audiocodes, Cisco Systems , Cyberdata, Digium , Grandstream, Mitel , Nortel / Avaya , Panasonic , Polycom , Sangoma , Snom , Xorcom and Yealink [ zh ] .
Iristel has performed various interoperability tests with the most important VoIP hardware & software manufacturers: Polycom, Mediatrix, Avaya, [7] [8] Grandstream, [9] Toshiba, [10] 3CX Phone System, [11] Snom [12] and Yealink . [13] In May 2012, Iristel became a major shareholder in Ice Wireless. [14]
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