How does a TTY/TDD/TT work?
A. A TTY, “TeleTYpe” TDD, “Telecommunications Device for the Deaf “, or TT “Text Telephone” refers to one piece of equipment with a small keyboard and visual display. The person using the equipment types what they would like to say and the text is shown on the display. TTYs use a coupler or modem to convert electric impulses into acoustic signals which are then transmitted to a telephone receiver. The signals are sent to the receiver’s TTY and are converted into text messages. In order for a person to use a TTY, the individual at the other end of the conversation must also have one or they must use a relay service. Q.
