VOIP technology is a one way of sending a voice signal also known as an analog signal in a medium which is digital, i.e, the internet. In practice, the process works like this when you have a standard analog telephone attached to your high speed internet connection with VOIP service. There will be an analog telephone adapter or ATA between the phone and the computer.
In order to place what would normally be a long distance call to a person who doesn’t have VOIP service you key in the number you want. The analog telephone adapter converts the touch tones into a digital format. The digital phone number is sent by the analog telephone adapter to the VOIP routing system at the service provider’s location. The VOIP service provider is located on the internet as well.
The VOIP service provider’s routing system identifies the recipient’s location and sends the call to the Public Switched Telephone Network (PTSN) at that location. The phone rings at the other end and the conversation can begin. Each time you speak, the analog to digital converter in the analog telephone adapter changes the voice tones into packets of digital information that can be transmitted across the internet. When the VOIP service meshes with the Public Switched Telephone Network at the recipient’s end, the digital packets which are the voice tones from you get turned back into an analog signal so that you recipient of your call can understand what you are saying.
The reverse process, i.e. the transmission of what the other person says to you is a mirror image of the first process. Their voice is transformed from analog to digital when it gets to the PSTN/internet connection. The digital packets are sent to the analog telephone adapter at your location where they are converted back into an audible or analog signal to be able to perceive the voice as that of your caller.
The technology to do the conversion from analog to digital and back again has been around as long as digital electronics. For example, your PC sound card converts digital CD information to analog signal needed by the speakers on your computer. The difficult part of the VOIP technology is the necessity to smoothly transmit the digital data over the internet and reassemble it in a continuous stream. This is know as the protocol.
When listening to voice transmission, there can be no gaps in the stream of digital packets or the voices will not be understandable. This part of the technology has only recently been available, but is actually equal or better in quality than you get with standard telephone networks.
The equipment available today that uses VOIP technology can be an analog telephone adapter for your head set through the computer. There are a few VOIP phones that act like a regular analog telephone but have the ATA incorporated into the phone. It’s actually a small dedicated personal computer in your telephone. These VOIP phones can be plugged into the computer with high speed internet connection or into the router.
By: Simon Ahtung
Posts Tagged ‘Voice Signal’
How Does VoIP Service Work?
February 10th, 2010VOIP
January 17th, 2010
VOIP is an innovative and pioneering technique to make and receive telephone calls. It engrosses the transmission of regular phone calls over the Net. In the other way, VOIP is made used in order to send and receive voice through Internet instead of passing voice through the standard telephone network. Voice over Internet Protocol is shortly known as VOIP. The main and essential router of voice conversations for any IP stationed network is Internet telephony, Broadband telephony, Broadband Phone, IP telephony and finally Voice over Broadband. Organizations rendering VOIP services are generally pertained as providers. The protocols that are utilized to acquit voice signals over the Internet Protocol network are generally denoted as VOIP protocols. They can be easily reckoned as commercial actualizations of the observational Network Voice Protocol which was contrived for the ARPANET providers.
Functionality
There are certain VOIP functionalities that can alleviate several tasks and which would be difficult to a greater extent to accomplish using traditional networks:
• Inwarding telephone calls could be robotically routed to the VOIP phone, despite where it has been connected to the network. People can receive calls if they take over their VOIP phone at the time of their journey and also they can connect to the cyberspace if they want to surf in the net.
• Disengage telephone numbers for the utility with VOIP are accessible in countries like United States of America, United Kingdom. Few other countries avail it from institutions like VOIP User.
• People working in Call center who make use of VOIP phones can ferment from anyplace with a comfortable and libertine Net connection.
• Quite a number of VOIP service admits PSTN features where maximum telecommunication companies ask for additional charges. Sometimes local companies may not offer services like forwarding calls, caller ID, conference calls and automatic redialing.
VOIP services convert a voice signal into a digital signal that moves over the Internet. If a person trying to call to a veritable phone number, immediately the signal is converted to a regular telephone signal earlier reaching the destination. VOIP can permit the user to create a call directly from a computer or from a special VOIP phone or also through a traditional phone attached to a special adapter.
VOIP Requisites and Technology
• The major magnetism of a VOIP is the capability to minimize the expenditure, as telephone calls pass through over the data network to a certain extent than the phone company network.
• IP communications comprises business appliances which improves the quality of interactions to facilitate several features like integrated contact centers, unified messaging, and robust-media conferencing with voice, video and data.
• IP telephony includes the complete collection of VOIP enabled services together with the interconnection of telephones for interactive services like placarding and phone plans. It also includes some fundamental boasts like transfer, forward, conferencing and hold.
By: Nila Priya
What Exactly is VoIP?
January 3rd, 2010
VoIP, acronym for Voice over Internet Protocol, is a common term used for a group of technologies involving transmission. This protocol is used to deliver voice communications across the internet protocol networks such as various packet switched networks like the internet.
VoIP is often referred to as Internet telephony, or IP telephony, and even voice over broadband. This protocol basically is a type of communication service that involves facsimile and voice messaging techniques and applications that are transmitted via the internet. These do not take help from the public switched telephone network (PSTN). The voice signal that is actually in analog form is first converted into a digital format and then the signal is translated into a format compatible with the internet protocol so that they can be successfully transmitted via the internet. This is the technique used at the transmitting end. At the receiver end these internet protocol packets that are received as digitized signals are converted back into analog form and sent to the receiver.
VoIP is a widely used technique of modern times. You can get connected to VoIP service providers by three primary ways: by an Analog Telephone Adapter, by using the Ethernet or Wi-Fi technique and by means of a softphone or a digital phone. VoIP has many advantages which have made it a successful service. It has high bandwidth efficiency and the cost of transmission is quite low. It also enables the performance of tasks and provides such services that are difficult to be implemented using PSTN making them highly flexible.
However VoIP is prone to internet attacks or what we commonly say that data can be hacked by experts and hence it is not a very secure technique. This problem has been taken into consideration and the government and certain military organizations are now using Voice over Secure IP (VoSIP) to protect data which is a modified version of VoIP
By: Joanne Greco
