Assistive Technology Professional (ATP) Practice Test

A TTY device, or Text Telephone, is primarily used for sending typed messages over phone lines. This technology enables individuals who are deaf, hard of hearing, or speech-impaired to communicate through typed text rather than spoken words. When a person types a message on the TTY keyboard, it is transmitted over the telephone line to another TTY user or a relay service, which converts the text into voice for the receiving party and vice versa. This method ensures that individuals can engage in real-time, text-based conversations, thus providing an essential communication tool within the telecommunication landscape for those with specific needs. The other options focus on enhancing sound clarity, improving sound capture, or serving as a standard telephone, none of which align with the primary function of a TTY device.