what is voip, how voip works
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What is voip and how voip works?

VoIP, Voice over Internet Protocol, is a general term for a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other packet-switched networks. Other terms frequently encountered and synonymous with VOIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, and broadband phone.

Internet telephony refers to communications services - voice, facsimile, and/or voice-messaging applications - that are transported via the Internet, rather than the public switched telephone network (PSTN). The basic steps involved in originating an Internet telephone call are conversion of the analog voice signal to digital format and compression/translation of the signal into Internet protocol (IP) packets for transmission over the Internet; the process is reversed at the receiving end.

VOIP systems employ session control protocols to control the set-up and tear-down of calls as well as audio codecs which encode speech allowing transmission over an IP network as digital audio via an audio stream. Codec use is varied between different implementations of VOIP and often a range of codecs are used; some implementations rely on narrowband and compressed speech, while others support high fidelity stereo codecs.

There are three methods of connecting to a VoIP network:

1. Using a VoIP telephone.

2. Using a "normal" telephone with a VoIP adapter.

3. Using a computer with speakers and a microphone.

There are types of VoIP Calls.

1. VoIP telephone calls can be placed either to other VoIP devices, or to normal telephones on the PSTN.

2. Calls from a VoIP device to a PSTN device are commonly called "PC-to-Phone" calls, even though the VoIP device may not be a PC.

3. Calls from a VoIP device to another VoIP device are commonly called "PC-to-PC" calls, even though neither device may be a PC.

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