May 22, 2024

PON Architecture

PON Architecture:

Like every other field, PON technology has its own terminology

[bodyads]

  • the CO head-end is called an OLT
  • ONUs are the CPE devices (sometimes called ONTs in ITU)
  • the entire fiber tree (incl. feeder, splitters, distribution fibers) is an ODN
  • all trees emanating from the same OLT form an OAN
  • downstream is from OLT to ONU (upstream is the opposite direction)

PON Architecture Diagram:

PON Architecture
PON Architecture

OLT (Optical line terminal)

OLT is a terminal equipment connected to the fiber backbone. It sends Ethernet data to the ONU, initiates and controls the ranging process, and records the ranging information. OLT allocates bandwidth to the ONU and controls the starting time and the transmission window size of the ONU transmission data.

[adsense]

ODN (Optical Distribution Network)

ODN is a FTTH fiber optic cable network based on PON equipment. Its role is to provide optical transmission channel between the OLT and ONU. According the function, ODN from the central office to the client can be divided into four parts:

  • feeder fiber optic subsystems,
  • cable wiring subsystem,
  • home line of fiber optic subsystems
  • and fiber terminal subsystems.

The main components in ODN include optical fibers,optical connectors,optical splitters and corresponding equipments for installing them.

ONU (Optical network unit)

ONU is a generic term denoting a device that terminates any one of the endpoints of a fiber to the premises network, implements a passive optical network (PON) protocol, and adapts PON PDUs to subscriber service interfaces. In some contexts, ONU implies a multiple subscriber device. Optical Network Terminal (ONT) is a special case of ONU that serves a single subscriber.

Shahed

Hi! I am Shahed Israr. I try to help GPON Technology users with their queries and provide them with relevant and accurate information to the best of my ability. My main goal is to assist and enhance GPON Technology user and help people find the answers they're looking for quickly and easily.

Follow Me:
TwitterFacebookLinkedInPinterestGoogle PlusDiggYouTubeRedditDelicious

Visited 118 times, 1 visit(s) today

Comments

comments

Shahed

Hi! I am Shahed Israr. I try to help GPON Technology users with their queries and provide them with relevant and accurate information to the best of my ability. My main goal is to assist and enhance GPON Technology user and help people find the answers they're looking for quickly and easily.

View all posts by Shahed →

Leave a Reply

Your email address will not be published. Required fields are marked *

Time limit is exhausted. Please reload CAPTCHA.

error: Content is protected !!