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Last modified: Tuesday, February 08, 2005 

Short for Voice over Internet Protocol, a category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls by sending voice data in packets using IP rather than by traditional circuit transmissions of the PSTN. One advantage of VoIP is that the telephone calls over the Internet do not incur a surcharge beyond what the user is paying for Internet access, much in the same way that the user doesn't pay for sending individual e-mails over the Internet.

There are many Internet telephony applications available. Some, like CoolTalk and NetMeeting, come bundled with popular Web browsers. Others are stand-alone products. VoIP also is referred to as Internet telephony, IP telephony, or Voice over the Internet (VOI)

Also see the VoIP Meets WiFi article in the Did You Know? section of Webopedia.

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For pages about VoIP . Also check out the following links!

Related Links

CTI, IVR, and CallCenter resources 
A comprehensive directory with more than 600 links to industry sites and CTI information sources as well as Voice over Frame Relay, Voice over Internet and telephony standards pages.

MIT Internet Telephony Consortium 
Home page of The Internet Telephony Consortium, a neutral forum that integrates a unique diversity of perspectives, spanning a wide range of firm types and academic disciplines. This page provides a background on the organization, as well as links to news, software, equipment providers, regulations, standards, and other related Web resources.

Net2Phone home page
Home page of Net2Phone, a service that allows you to place a call to a phone anywhere in the world through the Internet. There are links to download a copy of Net2Phone, FAQs, an information center, and product and company information.

Netscape CoolTalk product page
Netscape CoolTalk is an Internet telephone tool that provides audio conferencing, whiteboard, and text-based communications. This page provides a product description, features, and a link to a Web-based phonebook.

The Virtual Voice
Contains information on Internet telephony products, software and emerging technologies.

VocalTec - The Internet Phone Company
This home page provides links to VocalTec's line of Internet phone and conference products, downloadable software, company and news information, and customer and technical support.

Voice on the Net Coalition home page
The mission of this group is to educate consumers and the media by monitoring and supporting present and newly developed telephony, video, and audio technologies that are specifically designed and manufactured for the Internet community. This home page provides news on the FCC, long distance carriers, and industry information.

What SMBs Need to Know About VoIP
Replacing existing internal phone systems with VoIP networks can cut costs, simplify administration and enable a variety of new applications that improve collaboration and productivity.

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ShoreTel: Business VoIP - Learn about business VoIP with a free 80 page IP Telephony Guide. ShoreTel provides full featured phone systems ideal for companies with 50+ phones.

Voicenext : VoIP - Don't buy your next Phone System. Voicenext Hosted PBX can save you up to 80% compared to a typical PBX. Great features without the box. Free Estimate

WebEx: IP Telephony and Web Conferencing - Offers interactive online meeting services that enable web conferencing, video conferencing and teleconferencing through its secure, global network.

Protus IP Solutions: IP Virtual Fax - Offers web-based IP fax services that allows users to send and receive faxes from email and the Web.

related categories

Internet Telephony


related terms

call detail record




IP faxing



jitter buffer

local loop

soft phone




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