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A telecommunications device for the deaf (TDD) is a teleprinter, an electronic device for text communication over a telephone line, that is designed for use by persons with hearing or speech difficulties. Other names for the device include teletypewriter (TTY), textphone (common in Europe), and minicom (United Kingdom).
Real-time text is frequently used by the deaf, including IP-Relay services, TDD/TTY devices, and Text over IP.Real-time text allows the other person to read immediately, without waiting for the sender to finish composing his or her sentence/message.
While Carterfone required AT&T to permit connection of devices, AT&T successfully argued that they should be allowed to require the use of a special device to protect their network, placed in between the third-party modem and the line, called a Data Access Arrangement or DAA. The use of DAAs was mandatory from 1969 to 1975 when the new FCC Part ...
Learn how to get help for AOL via TTY.
A typical relay service conversation. A telecommunications relay service, also known as TRS, relay service, or IP-relay, or Web-based relay service, is an operator service that allows people who are deaf, hard of hearing, deafblind, or have a speech disorder to place calls to standard telephone users via a keyboard or assistive device.
Teletype teleprinters in use in England during World War II Example of teleprinter art: a portrait of Dag Hammarskjöld, 1962. A teleprinter (teletypewriter, teletype or TTY) is an electromechanical device that can be used to send and receive typed messages through various communications channels, in both point-to-point and point-to-multipoint configurations.
Each TDD has a keyboard with a text screen. A user either needs to connect with another person that has a TDD or use a relay service that can convert the text into voice for the hearing listener receiving the call. With the improvements in technology for phones, pagers, text devices and computer services, the use of the TDD has declined. [3]
The phrase TDD is not considered politically correct in the United States. This is because users with cognitive language impariments, among others, use the TTY devices as well. The article should be modified to use the phrases "TTY/TDD" and "Text Telephone" as a replacement for "TDD" and "Telecommunications device for the deaf" respectively.