telecommunications device for the deaf

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tel·e·com·mu·ni·ca·tions de·vice for the deaf

(TDD, TT) (tel'ĕ-kŏ-myū'ni-kā'shŭns dĕ-vīs' def)
Telephone accessory that transmits and receives text over standard telephone lines. Also referred to as teletypewriter (TTY) and text telephone (TT).
See also: assistive listening device
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
TRS enables callers with hearing and speech disabilities who use telecommunications devices for the deaf (TDD, which also served to update the acronym TTY), which are also known as teletypewriters, or TTYs, and callers who use voice telephones to communicate with one another through a third-party communications assistant.
Holy Angels Church of the Deaf, 4433 Santa Fe Ave., Vernon CA 90058; TDD (telecommunications devices for the deaf): (323) 587-0397; voice mail: (323) 587-2096; e-mail:

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