Always identify yourself when using a TTY.
Announce your name and location to the caller. It is important that both parties know who they are talking to .
It is proper to let the other party know if there is someone else monitoring the call.
It is a breech of privacy to eavesdrop on a TTY call by looking over the shoulder of the person on the TTY.
You should not save the TTY printout or hardcopy of the TTY conversation without the permission of the other person.