Voice over Internet Protocol (VoIP) is a protocol optimized for the transmission of voice through the Internet or other packet switched networks. VoIP is often used abstractly to refer to the actual transmission of voice (rather than the protocol implementing it). VoIP is also known as IP telephony, internet telephony, broadband telephony, broadband phone and Voice over broadband. "VoIP" is pronounced voyp, IPA: /voip/.
 Companies providing VoIP service are commonly referred to as providers, and protocols which are used to carry voice signals over the IP network are commonly referred to as Voice over IP or VoIP protocols. They may be viewed as commercial realizations of the experimental Network Voice Protocol (1973) invented for the ARPANET providers. Some cost savings are due to utilizing a single network to carry voice and data, especially where users have existing underutilized network capacity that can carry VoIP at no additional cost. VoIP to VoIP phone calls are sometimes free, while VoIP to public switched telephone networks, PSTN, may have a cost that is borne by the VoIP user. VoiP phone companies offer unlimited voIp calling in USA, Australia, Brazil, Guatemala, Canada, France, Hong Kong, Italy, Japan, Taiwan, Korea, Mexico, Puerto Rico, Spain, Europe and UK.

PhonePower's residential voip phone services start at $8.33/month with incredibly low international rates. This ip telephone service offers free features such as find me - follow me, simultaneous ring, E911 service, block list, 811 service, fax enabled voicemail, speed dial list, call waiting id, remote click to call and many more. Click here for PhonePower voip phone service.

8x8 inc internet phone service and voip phone service cost just $24.99 per month for unlimited local and long distance calling in the US, Canada, Puerto Rico, Guam, US Virgin Islands, France, Italy, Ireland, Spain and United Kingdom, plus unlimited in-network calling to other Packet8 subscribers worldwide, low International calling rates outside of these 10 countries and powerful calling features. This voip phone service comes with many free features such as caller ID, voice mail, 3 way, call waiting, conference bridge, auto attendant, choose your own area code, very low international rates and many more. Click here for more 8x8 voip provider. 8x8 inc business voip or virtual office is a hosted internet PBX solution comprised of powerful business class features including a customizable auto attendant, hunt groups, 3 digit extension to extension dialing, business class voice mail, 3 way conferencing, conference bridge, multiple call handling that come with a superior business quality phone with feature rich controls and unlimited calling plans to the United States and Canada. Click here to learn more about 8x8 voip solution 

QT Talk is one of the many voip phone companies offering unlimited calling for only $12.95 per month for the first 3 months  then $19.95 thereafter with super low international rates. Click here for more information on QT Talk voip calls.

Lingo voip phone services start $9.95 for the first 3 months and just $21.95 per month there after with great international rates. Lingo offers unlimited calls in the U.S. and to 30 countries with over 20 popular calling features plus you get a FREE Linksys adapter. Click here for Lingo voip telephony