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By Damon Watson | 22 April 2022 | 0 Comments

What is PON: Introduction, Types and Application

1. Introduction of PON

PON stands for Passive Optical Network. A PON is a telecommunications network that transmits data over fiber-optic lines. It is "passive" since it uses passive optical splitter to route data sent from a central location to multiple destinations.

PONs are used by ISPs and NSPs as a cost-effective way to provide Internet access for customers. Since PON is a point-to-multipoint (P2MP) system, which provides a more efficient way to transmit data than a point-to-point network.

The main transmission line can split off into 32 separate lines, which requires far less infrastructure than building direct lines to each destination with fiber optical cabling.

The central location of a PON is also called OLT (optical line terminal), while the individual destination is called ONU (optical network unit).


2. Types of PON

While all PON use optical fibers and unpowered splitters, there are several different versions. Below is a list of different types of PON.

APON: It refers to ATM PON. ATM is a transmission protocol based on cells. It can provide dynamic bandwidth allocation for the access network, which helps better meet the demands of broadband data services.

BPON: It means Broadband PON. It's developed based on APON, which supports transmission rates of 622Mbps. More functions like dynamic bandwidth allocation and protection are provided. It supports services such as Ethernet access, video transmission, and high-speed leased lines.

EPON: It refers to Ethernet PON. EPON standard is published by IEEE802.3 EFM. It combines Ethernet with PON technologically, adopting PON at the physical layer and Ethernet protocol at the data link layer, and achieving Ethernet access with the topology of PON.

GPON: The full form is Gigabit PON. It's the latest standard of PON access, which is of high bandwidth, high efficiency, large coverage, and abundant interfaces. GPON is considered the ideal technology for achieving access networks.


3. Application of PON

Lines that terminate outside buildings are called fiber-to-the-neighborhood (FTTN) or fiber-to-the-curb (FTTC). Lines that extend all the way to buildings are called fiber-to-the-building (FTTB) or fiber-to-the-home (FTTH).
PON Application

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