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Hardware & Equipment

ONT (Optical Network Terminal)

The device installed at your home that converts fiber optic light signals into electrical signals for your router. The fiber equivalent of a cable modem.

What It Means

ONTs are typically installed on the outside wall of your home or in a utility closet by the fiber ISP during installation. Most ONTs have ethernet and sometimes phone ports. Unlike cable modems, ONTs are almost always provided by the ISP and do not have a monthly rental fee. The ONT connects to the ISP's fiber network via a thin fiber optic cable. Modern ONTs support GPON or XGS-PON standards, capable of 2.5-10 Gbps. ONTs rarely need to be upgraded — when faster speeds become available, the ONT firmware is updated remotely.

Frequently Asked Questions

What does "ONT" mean?

The device installed at your home that converts fiber optic light signals into electrical signals for your router. The fiber equivalent of a cable modem.

Why does ONT matter for internet quality?

ONTs are typically installed on the outside wall of your home or in a utility closet by the fiber ISP during installation. Most ONTs have ethernet and sometimes phone ports. Unlike cable modems, ONTs are almost always provided by the ISP and do not have a monthly rental fee. The ONT connects to the ...

Related Terms

Modem
The device that connects your home network to your ISP's network, converting the incoming signal (cable, DSL, or fiber) into data your router can distribute.
Router
The device that creates your home Wi-Fi network and distributes your internet connection to all your devices. A router's capabilities often bottleneck your actual internet speed.
Ethernet (Wired Connection)
A wired network connection using an ethernet cable, providing faster and more stable speeds than Wi-Fi with zero interference. The gold standard for speed testing.
Range Extender vs. Access Point
Two different approaches to extending Wi-Fi coverage. Range extenders rebroadcast the signal (halving speed), while access points connect to your router via ethernet for full speed.

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About This Data

Definitions based on FCC standards, industry specifications, and federal broadband policy. Speed benchmarks reflect 2024 FCC standards. See our methodology.