How VOIP Works

Voice over Internet Protocol (VoIP) is a technology for communicating using “Internet protocol” instead of traditional analog systems. Some VoIP services need only a regular phone connection, while others allow you to make telephone calls using an Internet connection instead. Some VoIP services may allow you only to call other people using the same service, but others may allow you to call any telephone number - including local, long distance, wireless, and international numbers.
VoIP converts your voice into digital signals which go through various processes before they reach their destination. The same processes are repeated when you get a reply from the other end.
1-Your voice is made up of analog signals and as such it cannot be transmitted over the internet unless it is converted into digital signals. ATA converts your voice into digital form by using Analog-to-Digital (ADC).
2- the digital data is compressed into a standard format used for VoIP telephony. stores the compressed data within packets.
3-Now, your conversation has to travel over internet as digital packets. VoIP uses standard protocols like PPP and Real-time Transport Protcol (RTP) to transfer the data between you and another person. A protocol is a standard set by a software or hardware to enable the communication and transfer of data between two users. Generally, protocols in different IP layers are involved in data communication and each IP layer carries out a specific task to make the communication faster and efficient.
4-When the packets reach the other end, the compressed data in the packets is decompressed. Then, the digital data is converted into analog voice signals which are heard by the other end user.

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