what i need for Voip

You must have the Internet service and wide-ranging, for
Example service DSL or cable modem. According to the type of service
You are the joint, you might need a PC or modem
Or using a special VoIP phone or adapter to the phone or may not
You need to use special equipment.

To prepare a VoIP connection we need

1. Convert ADC to DAC
2. Now Tdgz packages must be on a good formula for transmission protocols, there are soldiers who can choose among them
3. Here should go into voice packets in data packets that use the system immediately (RTP over UDP over IP)
4. Hello, this all happens in real time because it can not wait that long to reach the sound.

Voice)) ADC - Compression Algorithm - Assembling RTP in TCP / IP
| <----
| ---->
Voice ((DAC - Decompress. Algorithm - Disass. RTP from TCP / IP

How Voip works

VoIP converts voice conversations into digital audio (ADC (analog to digital converter, and when you finish the transfer process the transfer of digital audio to a voice conversation (DAC (digital to analog converter of the VoIP works thus converts the sound to the numbers in the form of data packets, sends them and bring them back to the sound of the place to be met:

As the following mode of transmission of voice (Voice (source) - ADC ---- Internet --- DAC - Voice (dest)

The TCP / IP network creates IP packets contain the address of my head to control the call, VoIP uses to figure out a way in the network to reach the place you want to access it.

voip benefits

Benefits of Voip One of the benefits of free VoIP and instant messaging is that it is absolutely free to call anyone, anywhere, worldwide. Companies are that still offer free VoIP programmes like Skype and Ad Calls. These applications will allow you to call using free VoIP programming. Ad Calls will allow you to call a telephone for free. Calls are unlimited and you will be able to make free voip long distance calls in the long run.

VoIP does offer many advantages that aren't available with land line phones or with cellular. Some of these include the ability to talk with multiple people at once; many of the standard features bundled with normal telephone services come with VoIP packages, and the ability to speak unlimited (many services enable unlimited calling worldwide).

Nimbuzz free calls

Nimbuzz connects your phone to the people you want to reach over the mobile Internet. Not over expensive cell phone networks. All you need is a Wifi connection or an unlimited data plan from your mobile provider.Save your hard-earned money on calls to any land line and mobile phones.Nimbuzz combines the powers of the Internet and mobile communications into one, and lets you make calls, send messages and share files, on any mobile device, for free.

Make free calls using yahoo messenger

use Yahoo Messenger for making free PC to mobile phone calls.Select a friend in your contact list and click the Call button to get started. You and the friend you call both need Yahoo! Messenger, plus a microphone and speakers (or headset). If you own a laptop, you probably have these tools already built-in.
Inside your Yahoo messenger dial 18003733411 and press enter
then you will hear a voice message wait until the end of it
then dial any number you want with international format

Make free mobile calls with JAJAH Mobile Web

JAJAH Mobile Web, a service made especially for smartphones like the Blackberry, Treo, and Windows Mobile devices. Like Jajah's service that allows for the ability to make free local and international calls with a regular phone, Jajah's mobile service aims to do the same for mobile users. Any device that has internet access with a browser can make free or low-cost calls with a click. As long as you are a Jajah user, you can call other members for no cost, or call for a small fee to non-members. Web consumers can access the service directly from their browsers by visiting mobile.jajah.com. The Mobile Web service then ties into user's address books where calls can be placed. Simply enter the phone number of the individual or scroll down on your address book, and Jajah will make the call. Jajah has a Flickr photo tour so you can better understand the process involved.