Which device enables communication by typing for those who cannot vocalize?

Which device enables communication by typing for those who cannot vocalize?

• A. DTC
• B. TDD
• C. TTD
• D. FRS

Answer: (B)

Typing-based communication for people who cannot vocalize is enabled by a Telecommunications Device for the Deaf. This device provides a keyboard and a display and connects to a telephone line so typed text is transmitted to the other party, who can read it on their own TDD/TTY or via a relay service that converts the text back to speech. The other options refer to technologies not used for text communication over telephone networks (for example, data-terminal or general radio services), so they don’t serve this purpose.

Typing-based communication for people who cannot vocalize is enabled by a Telecommunications Device for the Deaf. This device provides a keyboard and a display and connects to a telephone line so typed text is transmitted to the other party, who can read it on their own TDD/TTY or via a relay service that converts the text back to speech. The other options refer to technologies not used for text communication over telephone networks (for example, data-terminal or general radio services), so they don’t serve this purpose.