TTY

A teletypewriter (TTY) is a communication device used by people who are deaf, hard of hearing, or have a severe-speech impairment. A TTY consists of a keyboard, display screen, and modem. Messages travel over regular telephone lines. People who don?t have a TTY can communicate with a TTY user through a message relay center (MRC). An MRC has TTY operators available to send and interpret TTY messages.

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