You raise an interesting question, but note that this article is about KPH, a radio telegraph station, not land-line telegraphy. I don't know much about your a

You raise an interesting question, but note that this article is about KPH, a radio telegraph station, not land-line telegraphy. I don't know much about your actual question though.... I know that there were "repeaters" in the lines, basically a relay with a local battery, on longer lines. I know railroads had their own network of telegraph circuits between stations, with poles along the track right-of-way. I know that the first trans-Atlantic telegraph wires was what led to research into basic transmission line theory, since the first cables only allowed pitifully slow signalling and the reason why was not well understood. If you look at old photographs of rail road right-of-way, you see 6 or 8 wires or more, so they obviously were running multiple telegraph circuits along the line. In passing, I will note the trivia that land-line Morse (the original) and international radio-telegraph Morse is different in a few characters, because some of the character "clacks" become difficult to distinguish as "beeps" under noisy conditions. You have successfully nerd-sniped me today, well played.