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Internet Tips InformationA Brief Intro To VoIP
by:
Mark Dodd
If you have an ear open to new computer technologies, you are sure to have detected
just about VoIP. Voice over Computer network Protocol (VoIP) is an emerging set of applications which allows you to do telephone calls over the Internet. It is already starting to replace existing telephone networks, with several folk and businesses opting to cancel their traditional phone line and use VoIP instead.
VoIP was originally developed to provide voice communication between computer users in several locations. Though it still has this application, it has been further developed into a telephone network in its own right. Folk exploitation VoIP can call any telephone anyplace
in the earth and can obtain calls on telephone sets connected to the Computer network or Local Area Network (LAN).
Background
It all started back in 1995 once
Israeli computer enthusiasts ready-made the 1st computer to computer voice connection. In the same year this technology was developed into a software system package called Computer network Phone Software. All that was needful to talk to another computer user was a modem, sound card, speakers, and a microphone.
The software system digitized and compressed the audio signal before causing it over the Computer network in data packets. These voice connections could only occur between computers which had the software system installed. The sound quality was really poor -- obscurity
near the quality of standard telephone connections.
The technology continuing
to be developed and by 1998 gateways had been established to allow PC-to-phone connections. Later that same year phone-to-phone connections that used the Computer network for voice transmission were set in place. These phone-to-phone connections still required a computer to initiate the call, but once the connection was established, the callers could use a regular phone set.
VoIP Now
There are presently
galore VoIP services accessible for act and commercial use. Several of these still trust on PC-to-PC connections but may offer another services such as PC-to-phone and phone-to-phone.
Internet phones are accessible that plug into the sound card or USB port of a computer. These phones may have number pads and ringers that allow you to use them the same as traditional telephones. The computer can be bypassed wholly by connecting a phone directly to a broadband electronic equipment
(either DSL or cable).
How Makes It Work?
The 1st step in exploitation VoIP is converting your voice into digital data. This is done by 'sampling' your voice -- dividing the analog sound signal into distinct steps that can be allotted a number value. Once your voice is digitized, the data can be compressed.
This compressed digital data is split up into 'packets' of just about 1500 bytes that can be transferred over the Internet. As well as the voice data, the packets contain information just about their origin, their destination, and a timestamp that allows them to be reconstructed in the correct order. Once they arrive at their destination, they are reassembled and born-again from digital back into analog so that the receiving party can hear your voice.
In order for voice data to be transmitted without noticeable delays, a broadband Computer network connection is necessary. Galore households and businesses are already exploitation broadband (either DSL or cable) so adding VoIP is comparatively
simple.
Just just about the author:
Mark is a technology adviser in the great City area. His web log can be see online at http://www.voipblogonline.com
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