Which of the following is a specially designed device that uses a TTY and a visual interface to help speech and hearing-impaired people communicate over the PSTN?
A) TTY
B) SMDR
C) TDD
D) PBX

Question

Quizplus · Accepted Answer

TDD (Telecommunications Device for the Deaf) is specifically designed to assist speech and hearing-impaired individuals in communicating over the Public Switched Telephone Network (PSTN) through a combination of a TTY (Text Telephone) and a visual interface.

Which of the Following Is a Specially Designed Device That