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Internet Phone

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General Description

Voice over Internet Protocol VoIP, Voice over IP is a general term for a family of methodologies, communication protocols, and transmission technologies for delivery of voice communications and multimedia sessions over Internet Protocol IP networks, such as the Internet. 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 160 voice, facsimile, and or voice-messaging applications 160 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.

Voice over IP has been implemented in various ways using both proprietary and open protocols and standards. Examples of technologies used to implement Voice over IP include

The H.323 protocol was one of the first VoIP protocols that found wide-spread implementation for long-distance traffic, as well as local area network services. However, since the development of newer, less complex protocols, such as MGCP and SIP, H.323 deployments are increasingly limited to carrying existing long-haul network traffic. In particular, the Session Initiation Protocol SIP has gained widespread VoIP market penetration.

A notable proprietary implementation is the Skype protocol, which is in-part based on the principles of peer-to-peer networking.

Web Links : Internet Phone

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Voice over Internet Protocol - Wikipedia, the free encyclopedia - Voice over Internet Protocol VoIP, Voice over IP is a general term for a family of methodologies, communication protocols, and transmission technologies for delivery of voice
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World News : Internet Phone

Microsoft Readies Internet Explorer Beta 9 - A public beta of Internet Explorer 9 IE9 is scheduled to begin on September 15 but only for some Windows users. Internet Explorer - Internet Explorer 9 - Microsoft - Software release life cycle - browser
T-Mobile Announces G2, First HSPA Cell Phone In U.S. - T-Mobile officially announced its G2 smartphone Thursday, the first phone designed for its high-speed HSPA network and possibly the Googliest phone ever.
Reliable Internet Connection Is Almost As Important As A Comfy Hotel Bed - A slow, unreliable internet connection is a source of huge frustration for today s business traveller when staying in hotels, according to independent research of 1,000 UK business travellers conducted by Quadriga. 62 per cent of respondents found having a reliable internet connection was almost as important as a comfortable bed 70 per cent and decent bathroom facilities 68 per cent .
Phone And Web Move To Net Council 5m - The council plans to save 5.7m a year by reducing the number of people visiting Access Croydon services and dealing with taxpayers over the phone and on the internet.
Feature Capitol Hill, The Internet, And Broadband An Ars Technica Quarterly Report - Introduction The promises Table of Contents I. Internet privacy II. Cyber war and cybersecurity III. Copyright enforcement and security IV. Net neutrality A. Ancillary questions B. 535 wildcards V. Stimulus the FCC s national broadband plan A. Stimulus B. National planning C. AllVid D. Left Out VI. Mobile wireless broadband oversight A. Early termination fees
Internet Luring On The Rise RNC - The RNC s Child Exploitation Unit is dealing with a rise in internet luring complaints involving teenage girls in the St. John s region.
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Brattleboro Police Warn Of Phone And Internet Scams - State police warning public to be wary of phone scams
Phone Insurance Usually Isn T Worth Extra Money - If you ve purchased a cell phone recently, your head is probably still swimming.
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