How did the optical fiber get to your home?
How did the optical fiber get to your home?
Tech Blogs
Sep 08, 2021
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On such a hot day, you must don’t want to go out. You blow the air conditioner at home, surf the internet, watch the TV and browse on moments, but do you know how the optical fiber broadband gets to your home?

It’s not easy to bring a thin optical fiber into your home!

Fiber to the home is called FTTH (Fiber To The Home), which refers to directly connecting the fiber from the OLT room of the operator to the ONU in the user’s home.


The network between OLT machine room and ONU is called ODN (optical distribution network),The ODN is composed of optical junction box, optical joint box, optical distribution box, optical cable and other equipment, and provides a transmission channel between OLT and ONU.

In ODN, optical cables are the lowest infrastructure for optical signal transmission, which are divided into backbone, distribution and home cables.

Trunk optical cable

Trunk optical cable is the feeder cable. It refers to the section of optical cable from the terminal office to the optical junction box. Generally, the general outdoor type of optical cable is selected. The number of main optical cable cores will be more, perhaps 100 cores, or hundreds and even

The laying of trunk optical cable usually includes piping, direct burying and overhead methods.


Distribution cable

Distribution cable refers to the section of optical cable from the optical junction box to the optical distribution box. Generally, the general outdoor type of optical cable is selected.

The construction method of the distribution cable refers to the trunk optical cable. Between buildings in the city, we can often see the neatly and firmly bound distribution optical cables along existing pipelines or external walls.

Indoors wiring optical cable

Indoors wiring optical cable is optical cable packed with rubble wire, which is a single-core or multi-core optical cable packed with rubble wire connected to the user’s home.

Generally, FTTH home optical cables use butterfly-shaped optical cables, which usually have good bending performance, resistance to lateral pressure, resistance to torsion, simple structure, convenient stripping, and on-site termination of optical fibers. This is also convenient for passing through vertical shafts in indoor environments. Laying of concealed pipes, exposed pipes, trunking or indoor nailing methods, etc., improves user satisfaction with construction.

No matter which section of optical cable is under construction, constructors must follow strict acceptance standards to ensure project quality and provide users with higher quality services.


In ODN, optical cables connect various devices, such as OLT, optical handover box, optical connector box, optical wiring box, etc. After various steps of fiber separation, jumping, cutting, testing, the optical signal is finally sent to your home.

Optical Handover Box

Fiber Distribution Box

Optical Wiring Box

The optical fiber is finally sent to your home….

But it’s not over yet. Next, broadband installation and maintenance engineers will complete the optical connection pairing to connect your ONU and start a client.

optical cable packed with rubble wire

clean optical fiber
cutting optical fiber

After completing the previous operation, connect the ONU to your home WiFi router and you can go online.

After a long transmission and various devices forwarding, The optical fiber is finally sent to your home.

Laid the optical fiber to your house is not easy, but even harder is the group of people who build and maintain optical networks.

As we all know, ODN networks are mainly distributed outdoors. Engineers who build and maintain ODN networks have to stay in the field for a long time. No matter wind, sun, rain, they must stick to struggle in the front line and escort millions of households Online.

It’s a hot summer, and when you’re surfing the Internet with the air conditioner at home, it’s engineers who built and maintain the fiber network that supported us a perfect summer in the hot sun.

Therefore, if you have no access to the Internet or the speed of network is slow, don’t worry, don’t get angry, and don’t complain, they are on their way to help you solve the problem.

This summer, thanks for air conditioner, WiFi, and even more for the engineers who silently support our high-speed Internet access behind us!