How VoIP works How to understand how VoIP works If you know some things in advance it is good. But everyone in this generation is familiar with everything except one thing. Everyone must have the experience of chatting on the internet. Many of those who have it also know that chat means not only writing and talking , but also talking if you want , which is called voice chat. Dedicated circuits are used in telephones. Dedicated circuit is , when we make a call, a physical line is created between the one who makes the call and the one who receives it. It's a lot like pulling current. The word / voice goes through this. And even at the speed of light, which is called real-time. However , no dedicated line is used on the Internet, there is no time limit for when a piece will arrive , individual pieces can be traversed one by one , that is also not a problem. After reaching the last piece, all the pairs are given to the receiver. This can be heard in Messenger or voice chat much later. Now , this piece is called a packet. Larger packets will take longer and smaller ones will take less time. But , if the bandwidth is high , it means the road is wide , big packets can go faster. In the past, a special device was used to get internet connection in the computer with which many of this generation are not familiar. Her name is Modem. Many people are thinking , what do you say when you are crazy , Grameen , Banglalink , QB , Bangla-Lion have used some modem , now they are coming to teach modem !!! In fact, it is more reasonable to call these devices dongles than modems. Because the modem I was talking about , its function was a little different. At that time there was no other phone except T&T. LAN people have learned new acquaintances. There was a device , called a modem , that had to be connected to a computer , and it had a port , to make a phone connection. I had to make a phone connection and dial the internet company with special software on the computer . In most modems , it would make weird , weird noises when dialing , the sound could be understood by listening to the connection. Aha ... days in my golden cage ... daydreaming this modem would actually convert the voice signal of the phone call into the signal of the computer , and the signal of the computer into the voice. I mean , it was a device for sending computer data over the phone line. Funnily enough , it was a phone , just a few extra devices that could convert computer signals. So , the question that comes to mind is , if a modem is a phone , can it be used? The answer is yes . Earlier modems had a port for inserting headphones and mouthpieces , and software had to be installed on the computer. With that software you could dial on the phone and talk using head-phone-mouth. From here comes the idea of VoIP. Now what if someone connects the computer's headphone connection to the modem's mouthpiece and the computer's mouthpiece connection to the modem's headphone ? He left the song Chumma Chumma De De ... and the sound recorder then dialed a number , including Zakir Naik. However , as soon as Mr. Joker Naik receives the phone, you can hear "Chumma Chumma De De ..." playing on the other side. And if he gets angry and abuses her , it will be recorded on the recorder. Leaving this record on YouTube will become a record of maximum views. The devil devil now comes to a little complicated system. Suppose , this system is set up in the computer of Adham Saheb. The dreamer Khokon Bhai sent him a voice chat request. Adham bhai , after receiving the request, immediately called Farabi. And the voice chat request was accepted. Then what will the dreamer brother actually do with whom is not considered. I don't see any fault in me, now let's come to a more complicated system. After all , the dreamer brother learned the whole system from Adham after that incident. After that , he chatted with Adham and asked him to call Farabi. And he called a Bengali himself. Profit in profit , Farabi received a phone call from his Bengali brother asking him to send him ১ 421.50 (420 not his style) to buy a laptop. What the Bengali brother did is not considered here, it is considered , what happened . Khikaj Khikaj Khikaj Bengali brother , was able to talk directly to Farabi on the phone. And the cost ??? Hold on , they talked for 10 minutes. It goes without saying that there is no cost of internet. The Bengali-Lion goes for about a month at 600 rupees. 10 minutes adham-farabi local call , hold 5 taka , 10 minutes , dreamer-bangal call , they can say good. But at this small cost the fun was found to be un-limited. The total cost, however , is much lower than the cost of an over-the-counter call. And that's how VoIP works.