It changes signals on a copper cable to signals that run on fiber, make one cable “look” like another cable without changing the nature of the network.
![图片2](https://ecdn6.globalso.com/upload/p/903/source/2023-12/658d5d53bbf4d79917.png)
It changes signals on a copper cable to signals that run on fiber, make one cable “look” like another cable without changing the nature of the network.