When I was growing up, my buddy's dad happened to be an old Berkley unix guru greybeard mad scientist type who told great stories of dumpster diving and the old

When I was growing up, my buddy's dad happened to be an old Berkley unix guru greybeard mad scientist type who told great stories of dumpster diving and the olden days. I was running a BBS at the time, and he told me stories of working in a modem manufacturing facility in QC. According to him, they would whistle into the receiver of each modem in order to test that it was at least minimally operational. I tried this a number of times by dialing into my BBS and got good enough to be able whistle up a 9600baud connection. I don't know why, but I really relished getting that rush of static noise after connecting successfully.