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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).
Once the most common type of TRS call, TTY calls involve a call from a deaf or hard-of-hearing person who utilizes a TTY to a hearing person. In this type of call, typed messages are relayed as voice messages by a TRS operator, [1] (also known as Communication Assistant (CA), [2] Relay Operator (RO), [3] Relay Assistant (RA), [4] or relay agent (agent)), and vice versa.
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]
Learn how to get help for AOL via TTY.
To solve this problem, Weitbrecht created a device that used the public telephone system to achieve communication: the teletypewriter (TTY). [ 1 ] After being approached by James C. Marsters , Weitbrecht came up with a revised design for the acoustic coupler (a type of modem ), which used echo suppression .
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.
It is also considered as a long-term replacement for the use of TDD/TTY devices for the deaf, currently in use with 911. TDD/TTY devices are considered legacy systems, and may be replaced by other real-time text technologies that transmit text as it is being typed. In Europe, real-time text is used in Reach 112 emergency service trials.
A secret tunnel discovered last week on the U.S.-Mexico border will be sealed by Mexican authorities, an army official in Ciudad Juarez said Saturday. The tunnel, discovered on Jan. 10, connects ...