Fiber Optic Glossary

The Optical Network Terminal (ONT) is a key device in fiber networks, converting light signals into electrical data for home or office devices. This article explains what ONTs do, how they work, and why they’re crucial for delivering high-speed fiber internet.

An Optical Network Unit (ONU) is the device that brings fiber internet into your home or office. It converts light signals into data your devices can use, manages network traffic, and distributes services like internet, TV, and phone. This article breaks down how ONUs work, their role in fiber networks, key differences with ONTs, and why they matter for the future of broadband.

OLT (Optical Line Terminal) is the central device in a Passive Optical Network, located at the service provider’s end. It converts, manages, and distributes optical signals to multiple end users, enabling fast, scalable, and secure fiber connectivity.

FTTR (Fiber to the Room) extends fiber optic cables directly into each room, delivering ultra-fast, stable internet without relying on Wi-Fi for coverage. It’s perfect for smart homes, luxury apartments, and offices needing top connectivity everywhere.

FTTD (Fiber to the Desk) is a high-performance network setup that delivers fiber optic connectivity directly to each user’s workstation. It offers faster speeds, stronger security, and lower interference compared to traditional copper cabling. In this article, you’ll learn what FTTD is, where it’s used, how it works, and whether it’s worth the investment.

FTTC (Fiber to the Cabinet) is a part-fiber solution where fiber optic lines connect to street cabinets, and copper cables finish the journey to your home. This guide covers what FTTC means, how it works, its pros and cons, and how it compares to FTTP and FTTN technologies.

FTTB (Fiber to the Building) brings fiber to the building’s basement or utility room, then uses existing cables to reach each unit. It’s a fast, cost-effective way to deliver fiber internet in apartments and offices.

FTTH (Fiber to the Home) is a fiber optic network setup where fiber runs directly into your house, offering ultra-fast, stable internet. Learn how it works, what type of fiber is used, and why it’s the gold standard in broadband.

FTTX (Fiber to the X) refers to various broadband network architectures using optical fiber to deliver internet closer to the end-user. The “X” represents different endpoints like homes, buildings, or curbs. This guide gives a quick overview of FTTX types and their meanings.