Once it was working, operation was like this: [1] The siphon recorder produced a squiggly line, which could be read as a code similar to Morse code. Not clicks,

Once it was working, operation was like this: [1] The siphon recorder produced a squiggly line, which could be read as a code similar to Morse code. Not clicks, though. The cable had so much inductance that the data rate was very limited. [1] https://atlantic-cable.com/Article/1895HazelHill/index.htm https://atlantic-cable.com/Article/1895HazelHill/index.htm