How to Connect Fiber Optic Cable to Router – (Quick Guide)

In this article, we have discussed how to connect fiber optic cable to a router step by step easy to follow the steps.

Most individuals these days are experimenting on their own with items they used to pay for. When it comes to electronics and technology, people are apprehensive. You don’t need a degree to fix and connect wires on your own.

Similarly, connecting fewer connections by yourself isn’t all that difficult. In this article, we’ll look into how to connect an optical fiber connection to a router.

What Is An Optic Fiber Cable?

An optic fiber cable also known as Fiber optic cable is similar to that an electrical cable that transmits data through pulses of light through flexible and pure fibers of glass and plastic. This has become a go-to option for Ethernet networking and telecommunication application due to its faster and quicker speed of transmitting data to longer distances.

An optical fiber cable is of two types;

  1. Multimode
  2. Single-mode

Multimode Fiber Cable:

Multimode fiber cables can carry multiple rays of light at the same time with varying optical properties at the core. In simpler terms, multimode cable has a large diameter which allows multiple modes of light to pass through, allowing more types of data to be transmitted. Multimode cable travels at a speed of 100Mbit/s, transmitting at a distance of 2 km.

Single Mode Fiber Cable:

A single-mode fiber cable as the name itself implies is an optical fiber designed to carry single modes of light to pass through it. This fiber enables one type of light mode to pass through and propagate at a time. The number of light reflections created as the light passes through the core decreases, lowering the attenuation and creating the ability for the signal to travel further.

You can also read Router for fiber internet

How to Connect an Optic Fiber to a Router:

You can connect your optic fiber cable to the router in two different ways;

  1. Connecting the optical fiber line directly to the Fiber router’s port. However, before you connect the cable, be very cautious not to touch or rub the tip of the cable, since this can interrupt the transmission. Handle with caution while plugging in and unplugging the fiber optic line. To remove the optic fiber cable from the port, softly push both outer ends of the cable and slowly pull the cable out of the port. If the cable is broken during this operation, the only alternative is to replace it.
  2. Connecting the fiber line to a modem and the modem to the router. In cases where the router doesn’t have a fiber line port, follow the steps given below to complete the connection.

Step 1:

Ensure you have all the necessary hardware you need for connecting the router.

Step 2:

Search behind your modem for an SFP port which will be the port that connects the optic fiber cable. Remove the cap from the SFP port on the modem

Step 3:

Carefully remove the cap from the end of the optic fiber cable, ensuring that you do not touch or rub the end of the cable. Touching or bringing the cable to any type of physical contact would result in replacing the entire cable with a new one.

Step 4:

Insert the power cable onto the modem and plug one end of the RED-ended Ethernet cable into the GE port on the back of the modem. Plug the other end of the RED-ended Ethernet cable into the RED WAN port on the back of the router.

Step 5:

Insert the power cable of the router. Keep in mind not to bend any of the cables for it will disrupt the smooth transmission and ultimately will not work.

Step 6:

Finally, plug the power cable into a wall socket and ensure that everything is turned on.

As the connection is now complete, there are certain things you need to keep in mind while using or working with an optic fiber cable

Guidelines To Look Into While Using An Optic Fiber Cable

  • Do not directly pull on the fiber cable. These cables are made up of Kevlar-armed yarn or a fiberglass rod protecting the cable.
  • Never exceed the bending radius of the cable. When pushed straight, fibers can be stronger than steel, yet they break readily when bent too tightly. This would either instantly damage the fiber or, in the long term, result in its removal and disposal.
  • Always roll the cable off the spool instead of spinning it off the spool. Spinning the cable of the spool would lead to twists in the cable from every turn. This would disrupt the fiber cable as it shouldn’t and never be twisted.
  • Use the figure 8 technique of rolling up the fiber cables to protect the cables for the long run.

You can also read the best router for att fiber.

Pros And Cons Of Using Optic Fiber Cable


  • Quality Connection
  • Scalability
  • Security
  • Long-Term Cost Effectiveness


  • Physical damage
  • Fiber Fuse
  • Short-Term Cost Effectiveness
  • Unidirectional Light Propagation

Final Thoughts:

To conclude, managing cables, wires, and other electronic things might be challenging at first. Anyone, with the right information, insight, and supervision, can perform a good job. We hope that this post provided you with a clear image of how to connect an optic fiber cable to a router while keeping in mind the rules pros and drawbacks of utilizing an optic fiber cable. Please share your router connection experience in the comments area.

David Peter
Hi, this is David Peter from California, USA. By profession, I am working as an Telecommunication engineer with a reputable Telecommunications Company here in California. I am a tech savvy person, and that is why I love my job. This blog is my part time hobby, and I love to write reviews about different products based on my own knowledge and experience. When you go through my reviews, you will feel that they are unbiased reviews as they come direct from my heart for tech lovers. The purpose is to help and guide people who are looking to buy or upgrade their electronic gadgets like modems and routers etc. Enjoy and give your feedback in comments!
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