The ONT connects directly to the fiber-optic line from your internet service provider, converting light signals into a usable internet connection. From there, the router takes over, distributing that connection to create your local area network (LAN) and manage traffic between all your devices. ONTs are for fiber; modems are for traditional broadband. What Is an ONT? An ONT (Optical Network Terminal) is your. The FTTH network adopts a three-level architecture of “Optical Line Terminal (OLT) – Optical Distribution Network (ODN) – Optical Network Terminal (ONT)”, where the ONT, as the conversion hub between optical signals and electrical signals, assumes the key function of the access layer.
