I found this pic on a website I stumbled upon, and wanted to ask if these were always used for "repeaters" or just certain ones?
https://davewhitmore.net/Images/field/SanibelRepeater2.jpg A creek I regularly visit had one of these by the road, and it has now been removed, cable and all. Presumably by the phone company, since the whole area was recently excavated, and bears orange paint markings.
What is inside these? and what exactly are "repeaters" in the phone sense? (I am a Ham radio operator, and use radio repeaters all the time)
