ADA and Direct Access Practice Test 2026 - Free ADA Exam Practice Questions and Study Guide

TDDs enable text-based communication for people who cannot rely on spoken language, such as those who are deaf, hard of hearing, or have speech disabilities, by allowing their messages to be sent over telephone lines. They automate the process of converting typed text into signals that travel over the phone network and then display or print the received text for the other person to read. This makes real-time conversation possible without spoken words.

The statement is true because TDDs are specifically designed for accessibility, serving users who need a textual channel rather than voice. They are not required for all customers, they do not replace televisions, and the acronym stands for Telecommunications Device for the Deaf, not Telephone Data Device.