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Written by: ShopForT1.net - Jul 4, 2008 Definition 1. - Voice over IP - that is, voice delivered using the Internet Protocol is a term used in IP telephony for a set of facilities for managing the delivery of voice information using the Internet Protocol (IP). In general, this means sending voice information in digital form in discrete packets rather than in the traditional circuit-committed protocols of the public switched telephone network (PSTN). A major advantage of VOIP and Internet telephony is that it avoids the tolls charged by ordinary telephone service. Definition 2. - VoIP (Voice over Internet Protocol) is a term used for voice being transported via the internet, intranet or data links to the internet regardless whether H.323, SIP or a proprietary standard is used. The data network involved might be the Internet itself, or a corporate intranet, or managed networks used by local or long distance carriers and ISPs. Who runs the network doesn't matter -- what does is the fact that you're taking voice (i.e., analog information) and encoding it digitally, converting it into packets, and then using a data network to move those packets along the most efficient path to their destination, where they get reassembled and delivered in the format they started in: voice. Definition 3. - A category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls. For users who have free, or fixed-price Internet access, Internet telephony software essentially provides free telephone calls anywhere in the world. To date, however, Internet telephony does not offer the same quality of telephone service as direct telephone connections. There are many Internet telephony applications available. Some, like Cooltalk and NetMeeting, come bundled with popular Web browsers. Others are standalone products. Internet telephony products are sometimes called IP telephony, Voice over the Internet (VOI) or Voice over IP (VoIP) products. Definition 4. - Voice Over IP VOIP needs the QoS - Quality of service. • In this example, based on Cisco hardware, the Call Manager behaves as a PBX. It can be placed anywhere on the WAN. • 11 KB is the minimum required for a phone conversation. • Both Analog phones or IP-phones can be used. • The Cisco Router can be plugged directly on a PBX or on an ISDN or Frame Relay or ADSL line. |
Definitions of VoIP