A variation of the power line: the redstone line is built on barriers.
Instructions:
Do it like the picture. The idea is from the power line. But you have to use boards instead of the fence. To make them float in the air you need barriers: /give (player) barrier. (If you take the selection from the barrier, the stops disappear too.
Yeah... It works, the amplifiers also fit, but... Slow phone line ;D
I still wouldn't build it.
More like that:
https://minecraft-bauideen.de/537-Strom-oder-Telefonleitungen
I think it's nice 🙂
Ugly
But above ground you can connect them well with house
I think it's mega cool!
I also recommend this:
https://minecraft-bauideen.de/2368-Auffangstation-f-r-Tiere
From me 😀
Grade: 1+
Problem is simply when you stand at the bottom you do not see the redstone line
Because Redstone is invisible from below!!!
But otherwise good idea