In the Army I set up networks with other team members over the civilian telephone lines in the 1990s. Everything was encrypted but sometimes nothing worked as fast as we wanted. The messages were very simple.

One mission we had a lot of assets trying to coordinate and the network cracked and popped over the POTS (PLAIN OLD TELEPHONE SYSTEM). We were set up for the fastest baud possible. I asked my commander if we could do half speed. I said, Sir let's just train with half speed because the computers cannot distinguish data from pops and cracks in the lines.

The whole division got the message and it worked! We had been sitting ducks for hours before this. I was very happy to say the least. Maybe there is a speed issue with encryption? I'm other words, the Hey you, this is me might be too fast.