A man was driving down the road. On either side there were phone lines. On one phone line a bird was sitting peacefully, on the other, the man could see the bird doing a funny dance. Puzzled, he stopped at a near by convenience store. Still puzzled, he asked the store manager about the bird doing the strange dance. Oh! The man replied. That’s the TTY line.
Although, most TTYs today are sitting in closets, collecting dust, they are very well known for the amount of noise the make when callers type on the keys. I bet at work that drives the co-worker in the next cubicle crazy!!