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According to a market research study, FTTx will serve nearly 60% of the world’s broadband subscribers by the end of 2025. The increase in fiber optic subscribers cannot be achieved without using fiber optic Internet. One of the components of fiber optic Internet operation is the optical network terminal (ONT). So, what is ONT?
Many of you may not know much about this behind-the-scenes hero. In this blog, we’ll explain what an ONT is, why it’s crucial in building a fiber-optic Internet, how it differs from other network devices, and other information you may care about.
“ONT” stands for Optical Network Terminal. It is sometimes referred to as an “ONT box,” “fiber box,” or CPE (Client Premises Equipment) and is the interface between the Internet Service Provider (ISP) and the fiber optic Internet end user.
This device is critical in a Fiber-to-the-Premises (FTTP) or Fiber-to-the-Home (FTTH) setup because it converts the optical signals sent over the fiber optic cable into electrical signals that can be understood and used by devices such as your computer, laptop, or cell phone.
It is usually a small white or black plastic box mounted in the basement, on an outside wall, in a closet, or somewhere out of view that doesn’t take up much space.
When your computer is connected to the Internet, the modem in your home provides a connection to an Internet service provider. Your computer uses this connection to send information to the ISP, and then the modem sends the request to ONT.
When it receives the request, ONT takes the information from the modem and acts as a “translator,” converting it into an optical signal. It then sends the signals over the fiber optic cable to the central office, which splits them into individual lines through a splitter box and sends them to different destination customers.
Once all the lines are sent to their destinations, they are combined again by another splitter box and returned to the central office. The optical signals from the fiber optic cable are then converted back into electrical signals. And sent to the modem.
Although ONT may look like a box on the outside, it’s a lot of things on the inside. Here are the typical components inside :
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