Fibre optic cable and Transmission line

Fibre optic cable noun - A cable made of optical fibers that can transmit large amounts of information at the speed of light.

Transmission line and fibre optic cable are semantically related. In some cases you can use "Transmission line" instead a noun phrase "Fibre optic cable".

Transmission line noun - A conductor for transmitting electrical or optical signals or electric power.

Fibre optic cable and transmission line are semantically related. Sometimes you can replace phrase "Fibre optic cable" with "Transmission line", this phrases are similar.