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3. What are VoIP call protocols? |
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Voice over IP (VoIP) uses the Internet Protocol (IP) to transmit voice as packets over an IP network. Using VoIP protocols, voice communications can be achieved on any IP network regardless of whether it is Internet, Intranets or Local Area Networks (LAN). In a VoIP enabled network, the voice signal is digitised, compressed and converted to IP packets and then transmitted over the IP network. VoIP signalling protocols are used to set up and tear down calls, carry information required to locate users and negotiate capabilities. The key benefits of Internet telephony (Voice over IP) are their very low costs, the integration of data, voice and video on one network, the new services created on the converged network and simplified management of end user and terminals.
There are a number of protocols that may be employed in order to provide for VoIP communication services. Some of the most common ones are listed below:
• H323
• SIP
• MGCP |
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