That click stopping the sound makes me curious to see a plot of bytes per second sent and received. Is the modem resetting itself every time it clicks and intro

That click stopping the sound makes me curious to see a plot of bytes per second sent and received. Is the modem resetting itself every time it clicks and introducing a small pause or data loss? There is no data being sent or received yet when it makes this sound; as soon as it dials and starts handshaking it goes away. You can hear that here: https://www.youtube.com/watch?v=S-ChICic2TA https://www.youtube.com/watch?v=S-ChICic2TA EDIT: actually that's only partially true -- in the video above it's still making the noise when the dialling is happening. It disappears as soon as it detects a carrier from the other modem. This is weird because the click really sounds like a relay and the function of the relay should be to hang up the connection. Obviously, hanging up while in the middle of dialling is not a good idea.