What is VOIP and How it work ?

Anyone know what is VOIP and How it work ? I am searching info on that for my college project if anyone know about VOIP plz provide me information.

Thanks

Voice Over IP (VOIP) has the potential to completely revolutionise the way the worlds phone systems operate. There are many VOIP service providers that have been around for a while, and are growing steadily. Now the worlds leading telecommunications operators are waking up to the endless possibilities of this new technology, setting up VOIP calling centres around the world and promoting the sales of Voice Over IP phone systems.

it like you would use any telephone. Simply pick up the phone, wait for the dial-tone, and then dial the telephone number of your choice. There are no extra numbers to dial and no special routines to follow. It's that simple. You don't have to be a tech wizard to VoIP service; you only need to be someone who would like great prices and great features provided by their phone company every day.

If you would like to surf the web and use your VoIP service at the same time, have no fear, because you can share your Internet connection with your computer. Talk on the phone and surf the net at the same time with ease (depending on your home network setup, this may require additional equipment). When going with a phone to phone setup most VoIP providers will provide you with a phone adapter. You can also use your computer and a headset to make VoIP phone calls through your computer with a simple piece of software and no additional equipment.

With VOIP phone systems it is possible to make a call in one of three ways:

ATA (gateway) – The simplest way to make a VOIP phone call is through the use of ATA’s (analogue telephone adaptor) sometimes called gateways. These devices enable you to make use of your existing standard analogue phones. You simply plug your standard handset into the ATA (gateway) then connect the ATA to your computer or your internet connection, enabling you to make VOIP calls.

IP Phones – These handsets look just like normal standard handsets. They have an RJ 45 Ethernet connector instead of the standard RJ 11 connectors. These phones have all the necessary software and hardware to handle VOIP calls already built in them. They connect directly to your router, providing a very fast and cost effective entry into the world of Voice Over IP.

Computer to computer – This is the easiest way to make use of the VOIP technology. There are many companies offering cost effective software that you can use for this type of VOIP. Usually the only charge you pay is the monthly one from your internet service provider, even for long distance calls. All you need is a microphone, speakers, a suitable sound card and a fast internet connection.

MTNL VoIP uses 'Voice over Internet Protocol' (VoIP) technology and it's just a great new way to make and receive phone calls using your broadband connection instead of your standard phone line. MTNL converts your phone calls into data that zips through your high-speed broadband connection just like email. It comes out the other end just like a regular phone call. Your callers are unlikely to know that it's any different since it sounds just like a regular phone call.

VOIP stands for “Voice Over Internet Protocol”, or “voice over IP”. If you have a VOIP phone, you can travel almost anywhere and receive your calls straight through an Internet connection. Internet phones offer you mobility. With a broadband Internet connection, you can get free Internet phone calls no matter where you travel. VOIP is also good to use as a home phone if you call long distance frequently. You will never again pay huge roaming fees on your cell phone again. Another major advantage of using VOIP services is that is generally works well and is highly functional.

VoIP refers to the set of technologies that are to pass telephone calls digitized IP packets. These technologies are used for several years now, and maybe without knowing your voice is digitized and transmitted in IP packets with your current phone somewhere in the network of the latter. The digitization of the voice is like recording your voice using a microphone on a PC in MP3 format. There is no charge for talking online.