PON

Short for Passive Optical Network, a high-bandwidth, point-to-multipoint optical fiber network based on the asynchronous transfer mode protocol (ATM), Ethernet or TDM.

PONs generally consist of an OLT (Optical Line Termination), which is connected to ONUs (Optical Network Units), aka subscriber terminals, using only fibre cables, optical splitters and other passive components (do not transmit signals using electricity). Up to 32 ONUs can be connected to an OLT.

The OLT is located at a local exchange, and the ONU is located either on the street, in a building, or even in a user’s home.

PONs rely on lightwaves for data transfer.

In a PON, signals are routed over the local link with all signals along that link going to all interim transfer points. Optical splitters route signals through the network; optical receivers at intermediate points and subscriber terminals tuned for specific wavelengths of light direct signals intended for their groups of subscribers. At the final destination, a specific residence or business can detect its specified signal.

PONs are capable of delivering high volumes of upstream and downstream bandwidth (up to 622 Mbps downstream and 155 Mbps upstream), which can be changed “on-the-fly” depending on an individual user’s needs.

Webopedia Staff
Webopedia Staff
Since 1995, more than 100 tech experts and researchers have kept Webopedia’s definitions, articles, and study guides up to date. For more information on current editorial staff, please visit our About page.

Top Articles

The Complete List of 1500+ Common Text Abbreviations & Acronyms

UPDATED: This article was updated April 6, 2021 by Web Webster   From A3 to ZZZ we list 1,559 text message and online chat abbreviations to...

How to Create a Website Shortcut on Your Desktop

UPDATED: This article was updated April 6, 2021 by Web Webster   This Webopedia guide will show you how to create a desktop shortcut to a...

Windows Operating System History & Versions

The Windows operating system (Windows OS) refers to a family of operating systems developed by Microsoft Corporation. We look at the history of Windows...

What are the 5 Generations of Computers?

UPDATED: This article was updated on April 6, 2021 by Web Webster   Learn about each of the 5 generations of computers and major technology developments...

Random Access Memory (RAM)...

UPDATED: This article Updated April 6, 2021 by Web Webster   Random Access Memory (RAM)...

OEM – original equipment...

UPDATED: This article was updated April 6, 2021 by Web Webster OEM (pronounced as...

Best ERP Software for...

UPDATED: This page was updated April 6, 2021 by Web Webster   Enterprise resource planning...