Get to Know IP Phone

How does IP Telephony work?

Internet telephony is a communication option in which the internet is used to transmit telephone calls, either from one computer to another, from a computer to a traditional telephone set, or from one telephone device to another. In other words, IP phones use the internet to make and receive calls. IP phones work by reading an individual’s analogue voice signals, which means, when a caller speaks into the microphone, his voice is converted into data and the computer reads that data just like any other data sent over the internet. This data too is converted into digital signals and sent through a broadband connection. Basically, IP phones use a protocol known as VoIP (Voice Over Internet Protocol) and the entire process takes a fraction of a second. At the receiving end, however, it’s the reverse process. Each data packet is then reassembled into data compatible with the receiving machine which demodulates the data and converts it back into voice signals, for the receiver to understand. However, the final step in this process depends on whether the receiver is using a telephone system or computer. If it’s a telephone, then a gateway device is used to complete the demodulation process, whereas if it’s a computer, the sound can be heard via headphones or attached speakers. In short, here the system uses IP and local area network (LAN) to transmit the calls and other information in place of the traditional phone line and phone network.