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What is an ONT for a Fiber Optic Network? | Glo Fiber

ONT box with three antennas, illustrating the essential device used to connect homes to a fiber optic network for high-speed internet.

Not sure why your home needs an ONT for fiber connectivity? Discover what a fiber ONT is, why it's necessary, and how it works in our comprehensive guide.

Fiber Optic ONT Box: What is It?

 

Fiber internet is lightning-fast, highly reliable, and the perfect choice for households with lots of devices. But before you can enjoy top-notch download speeds and low latency, your local fiber network needs a way to connect to your home.

That’s where ONTs or “optical network terminals" come in. Today, let’s break down the meaning of an optical network terminal and why your home needs a fiber ONT to connect to a fiber network.

 

What is a fiber ONT (optical network terminal)?

 

Put simply, an ONT is a special device that connects properties to broader fiber networks. Just like how cable connections need modems to function, ONTs are necessary for both fiber to the premises (FTTP) and fiber to the home (FTTH) networks. Also called “fiber boxes,” fiber ONTs are typically installed on inside of the building, similar to how you would install a modem. They serve as signal endpoints, collecting data from fiber networks and translating it into a format that can be read by computers or routers. Without ONTs, easy fiber connectivity wouldn't be possible. In effect, a fiber ONT does the same job as a traditional cable internet modem, but for fiber connections specifically, and while they are similar, it's worth keeping in mind that ONTs will only work with fiber connections, and modems will only work with cable.

 

How does a fiber optic ONT work?

 

In any fiber optic internet network, a network service provider transmits internet data through pulses of light. This is part of what enables fiber internet to be so fast and suitable for a wide range of different online activities.

However, routers and other connected devices don't understand data as light pulses. Instead, they need those light pulses translated into electrical signals that they can read. ONTs carry out this critical task. Here's how it works:

  • Your home’s ONT is connected to the local fiber network and your home’s router, such as a WiFi router.
  • The ONT receives light pulses from a connected fiber optic cable.
  • The ONT then converts the light into electrical signals via an optical interface. In the process, it also corrects any errors and preps the data to be transmitted to your home’s local area network (LAN).
  • Next, the ONT transmits the electrical data across ethernet cables to a router or end terminal (a computer, like your desktop or laptop). By doing this, it delivers internet connectivity to end users.
  • When you send data somewhere else through a fiber internet connection, the ONT carries out this operation in reverse. It takes the electrical data generated by your devices and translates it into optical signals that can be sent across the fiber network.

You can think of a fiber optic ONT as a two-way gateway for speedy, streamlined communication between users and the larger internet.

 

Why are fiber ONTs required?

 

Modern devices – like your desktop or WiFi router – are not designed to receive light pulses and understand what they mean. Instead, they’re designed to receive electrical signals, which they can then translate into binary code for computer operations.

Fiber ONTs are required to get the speed benefits of fiber optic internet connectivity. Thanks to ONTs, internet data can travel at the speed of light for the vast majority of its journey, and it only transforms into an electrical signal at the final stage when it reaches your computer or WiFi router.

 

ONT types                                                                     

 

There are different types of optical network terminals you might need for a fiber network. Most residential ONTs are small and secure from outside tampering – they may be mounted on the interior or exterior wall of your home. Exterior optical network terminals are typically weatherproof, too.

Meanwhile, businesses might benefit from fiber ONTs that have built-in routers or that include hardware support for special features like Voice over Internet Protocol (VoIP) functions and services. Advanced security elements may be additionally included in these fiber ONTs.

Overall, though, every ONT serves the same purpose for a fiber network by facilitating data translation between fiber light pulses and local area network electrical signals.

 

Connecting a fiber ONT to your home

 

Fortunately, you don't have to worry about setting up a fiber optical network terminal in your home if you want to get the benefits of this internet type. Instead, setting up an ONT is a normal part of your home fiber installation.

That means your fiber internet service provider will handle this task for you. They’ll schedule an appointment to set up your home’s fiber optic ONT, in addition to any other infrastructure or hardware that might be necessary to guarantee consistent connectivity, on a date that works for your schedule.

Once your ONT is installed, you won't need to access it or adjust any of its settings to enjoy fast fiber internet. In fact, you should never tamper with a fiber ONT – accessing and configuring it requires special tools and knowledge. This is one element where ONTs and coaxial cable modems differ; you can install a modem by yourself, but ONT installation is best handled by the experts.

 

Get started with Glo Fiber

 

At Glo Fiber, we make enjoying the speed and reliability of fiber internet easier than ever. We have multiple internet plans with multi-gig speeds, and our experienced technicians will find the perfect location for a fiber ONT while accounting for your existing internet infrastructure.

 

Why wait? Contact us today to learn about fiber internet availability, or check out our internet plans to learn more about what we offer.