Brief introduction to PON network architecture

You may not know what “PON” is (usually read as “pang”), but you must have heard of “fiber to the home”.

You may not know what “ONU” is (usually read “ONU“), but when you open the weak electricity box in your home, you must see a “small box” with optical fiber. This “small box” is the ONU (Optical Network Unit, optical network unit), commonly known as the “ONU“. Today’s protagonist —— “PON” (Passive Optical Network, passive optical network), is the key to achieve optical fiber access, is the “last kilometer” optical fiber transmission technology between the network and users.

What is PON?

Each household optical fiber, connected behind a huge network, let’s follow the optical fiber, trace the stream, explore together. The optical fiber connected to the ONU comes from the splitter in the weak electricity well / corridor, which can divide the optical signal into multiple channels in a certain proportion. The optical signal entering the optical splitter comes from the optical line terminal OLT (Optical Line Terminal). The OLT, ONU, and between the two “transmission channels” ODN (Optical Distribution Network, optical distribution network) constitute the PON network. Among:

OLT is an operator-side device responsible for assigning data to the upper-level business network.
ONU is a user-side device responsible for receiving data sent by OLT and directly to the user.

We can get a brief understanding of the PON network architecture according to the figure below.

Shenzhen HDV Photoelectron Technology Ltd. is a professional ONU equipment manufacturer is also intelligent communication ONU and module manufacturer, our company currently sells a variety of upper and down communication equipment, such as: Fiber media converter, Ethernet switch, OLT equipment, ONU equipment and so on. If you want to know more about communication technology,  welcome to contact us at any time.