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Voice over Internet Protocol (VoIP) 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.

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Wikipedia About Voip

Voice over Internet Protocol (VoIP) 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. thumb|Cisco VoIP phone

History

  • 1974 - The Institute of Electrical and Electronic Engineers (IEEE) published a paper entitled "A Protocol for Packet Network Interconnection."
  • 1981 - IPv4 is described in RFC-791.
  • 1985 - The National Science Foundation commissions the creation of NSFNET.
  • 1995 - VocalTec releases the first commercial Internet phone software.
  • 1996 -
  • ITU-T begins the standardization of VoIP initially with the H.323 standard.
  • US telecommunication companies ask the US Congress to ban Internet phone technology.
  • 1997 - Level 3 began development of its first softswitch (a term they coined in 1998).
  • 1999 -
  • The Session Initiation Protocol (SIP) specification RFC 2543 was released.
  • The first open source SIP PBX (Asterisk) is created by Mark Spencer of Digium.
  • 2004 - Commercial VoIP service providers proliferate.
  • 2009 - Skype releases a Wi-Fi only application for the iPhone

VoIP Implementations

Voice over IP has been implemented in various ways using both proprietary and open protocols and standards. Examples of available VoIP implementations include:

  • SIP/RTP
  • IMS
  • H.323
  • Skype

Further examples and comparisons are available from the following Wikipedia article: Comparison of VoIP software

Consumer market

Example of VoIP adapter setup in residential network A major development starting in 2004 has been the introduction of mass-market VoIP services over broadband Internet access services, in which subscribers make and receive calls as they would over the PSTN. Full phone service VoIP phone companies provide inbound and outbound calling with Direct Inbound Dialing. Many offer unlimited calling to the U.S., and some to Canada or selected countries in Europe or Asia as well, for a flat monthly fee as well as free calling between subscribers using the same provider. These services have a wide variety of features which can be more or less similar to traditional POTS.

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News about Voip

Recording VoIP Calls: Is it Legal?

ZDNetI was on an interview the other day and began thinking about how nice it would have been to record the rather long-winded engineer on the other end of the line. This got me thinking: are you allowed to record your VoIP calls without asking for permission first? Of course not, you say. After all a VoIP call is a telephone call (OK, half a telephone call, but you get the point), right? And we all .....http://blogs.zdnet.com/Greenfield/?p=335

Star Trek Communicator VOIP Handset

I4UStar Trek fans are probably frothing at the bit to see the movie that opens at midnight tonight in many markets. Hard core fans may be looking for build up their geek memorabilia kit in honor of the new films and we have found the VOIP handset for the true...http://www.i4u.com/article24631.html

Microsoft Bans VoIP From Its Mobile Marketplace

Salon.comMicrosoft has banned VoIP applications from its upcoming Windows Mobile Marketplace, according to PCWorld . The blocking move is part of a 12-point restriction on applications sold in the Redmond giant’s online marketplace, the opening timed to coincide with the introduction of Windows Mobile 6.5. But is the software giant fighting a rear-guard action against an inevitable future?http://www.salon.com/tech/giga_om/tech_insider/2009/05/06/mi...

Microsoft Bans VoIP, Rival Stores At Mobile Market

Slashdotnarramissic writes "Microsoft has identified 12 application types that won't be accepted at the MarketPlace for Mobile store. Among them: VoIP apps, programs that are larger than 10MB, and programs that change the default browser on a device. Overly restrictive? Maybe. But perhaps the clear set of rules (PDF) will prevent confusion similar to what's been encountered over Apple's policy for ...http://tech.slashdot.org/article.pl?sid=09/05/06/124239&from...

VoIP taking on traditional mobile operators

iTNewsMobile voice-over-IP (VoIP) is starting to gain traction, and will soon offer a direct challenge to traditional mobile operators, according to a recent report from analyst firm Gartner.http://itnews.com.au/newsstory.aspx?CIaNID=102607&r=rss

News about Voip

Fring iPhone VoIP Application Now Available

Voip- NewsWhen fringland ltd . previewed its VoIP application for the iPhone in April 2008 , the app followed most of the rules it was supposed to. In particular, it sent calls over wifi but not over the cellular data network. It also broke a rule, however, by ... http://www.voip-news.com/feature/fring-iphone-voip-100808/

Mobile VoIP: Peer to Peer Video Calling

Voip- NewsPeer-to-peer video calling and multi-point video conferencing is now available on mobile phones thanks to Global IP Solutions’ VideoEngine Mobile. The new solutions runs on the Windows Mobile platform. The company is using Marvell Technology to ... http://www.voip-news.com/blog/?p=1616

VoX Communications Partners with Unified Technologies Group to Provide ...

Consumer Electronics NetPVSP) IP-based communications service provider, today announced that it has signed an agreement to partner with privately-held Unified Technologies Group, Inc. (UTGI) to become the first to provide VoIP-enabled service to mobile phone customers across ... http://www.consumerelectronicsnet.com/articles/viewarticle.j...

Verizon Gets Smacked Down For Its VoIP Patent Suing Spree

Tech DirtVerizon was one of the last players to the VoIP party. Cable companies had been offering VoIP for years, and then Vonage, AT&T and a variety of other startups really built the market before Verizon even bothered to enter the space with an overpriced ... http://www.techdirt.com/articles/20081006/2246322473.shtml

Bandwidth.com Deploys Ditech Networks Solution to Support Web 2.0 and ...

Consumer Electronics Net ... voice quality solutions to the world's communications industry, today announced that Bandwidth.com, an innovative business communications provider, has purchased and installed Ditech's Packet Voice Processor (PVP) solution to support Web 2.0 and VoIP ... http://www.consumerelectronicsnet.com/articles/viewarticle.j...

Search results for Voip

VoIP Services and PC to Phone Service | MyVoipProvider.com

My VoIP Provider - Compare, review, rank, Broadband Phone and PC to Phone VoIP services (Voice over IP). Free VoIP directory and rate search.http://www.myvoipprovider.com/

VoIP and Internet Phone Providers and Service Plans Reviewed by ...

Reviews and Information on VoIP Phone and VoIP providers. Compare VoIP Service Providers.http://www.netphoneinfo.com/

VoIP News - VoIP for Business - VoIP News

Keep up to date on the latest news and views about VoIP, IP PBXes, converged networks, Hosted PBXes, and other business telephony solutions.http://www.voip-news.com/

VOIP Made Easy

VOIP is a word you will hear more and more in the future. It stands for Voice over Internet Protocol. This technology is poised to change the way we communicate.http://voipeasy.com

Voip Articles

Voip Articles. In-depth, intelligent up to the minute insight into the voip world. Experienced writers share their thoughts and research.http://www.voip.com/voip_articles.aspx

Wikipedia results for Voip

Voice over Internet Protocol - Wikipedia, the free encyclopedia

Voice over Internet Protocol (VoIP) is a general term for a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other ... http://en.wikipedia.org/wiki/Voip

VoIP User - Wikipedia, the free encyclopedia

VoIP User is a community driven and financed SIP based VoIP network. The projects aim is to introduce people to the concept of VoIP by allowing members to experiment with SIP and ... http://en.wikipedia.org/wiki/VoIP_User

VoIP recording - Wikipedia, the free encyclopedia

Voice over Internet Protocol (VoIP) recording is a subset of telephone recording or voice logging, first used by call centers and now being used by all types of businesses.http://en.wikipedia.org/wiki/VoIP_recording

VoIP VPN - Wikipedia, the free encyclopedia

A VoIP VPN combines Voice over IP and Virtual Private Network technologies to offer a method for delivering secure voice. Because VoIP transmits digitized voice as a stream of data ... http://en.wikipedia.org/wiki/VoIP_VPN

VoIP spam - Wikipedia, the free encyclopedia

VoIP spam, is the proliferation of unwanted, automatically-dialed, pre-recorded phone calls using Voice over Internet Protocol (VoIP). Some pundits have taken to referring to it as ... http://en.wikipedia.org/wiki/VoIP_spam
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Extending VoIP to Wireless LANs

Extending VoIP to Wireless LANsJimmy Ray and Robb dive into the technical side of taking your IP Telephony and extending it to your 802.11 wireless network. Should you do it? What do you need to know. Well tune...Flash - Video

Tux Droid VOIP_

Tux Droid VOIP_first Demo of Tux used as a wireless VOIP phone...Tux Droid VOIP Kysoh SkypeFlash - Video

VOIP Company Can Pay You For Being ...

VOIP Company Can Pay You For Being A Customer!You've heard of Vonage and Digital Phone Service from the Cable Companies Right? Well what if you could get paid monthly from those companies for being a customer? How about if...Flash - Video

Voip in iphone ( setup and instllat...

Voip in iphone ( setup and instllation)more voip tips please visit http://voip8.blogspot.comMPEG 4 - Video

Voip On A Stick

Voip On A StickThe PAL VOIP on a flash drive for internet phone communications anywhere in the world you have a computer and internet serviceFlash - Video

Answers for Voip

dfc849VoIP? ? ? ?dfc849yes skype download it and you just cant make internatsinal calls only us calls for free click link plz make me bast anwerteju666What is soft voip and how is it different from voip service like skype?teju666Here is a website that will help http://www.thedigest.com/ with the answers to your questions.AndreaDo anybody know a voip soft-phone able to manage different voip numbers at the same time?Andreano, sorry can not doe it, because each have a different SIP protocol....but, if you have an in/out number ( which is then premium) you could use GrandCentral to do it!!! I also use 5 different soft...saleemHow i do i trace someone who is calling by using voip raider software ?saleemThey cannot easily be traced - by the average person. But, I expect if the authorities got involved, they can trace back to the exchange that terminates the calls. Then, they will find out the calls...bad libertineI would like to educate myself about VOIP where to start?bad libertine- Be famaliar with the most commonly used Codecs, like G.711u/a, PCMU/PCMA, G.729a, GSM, etc. - Something about the 3 primary protocols: SIP, H323, IAX. - SIP is becomming dominant for stand-alone s...
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