Which technology helps in enabling TTY communication?

Telecommunications Relay Services (TRS) is essential for enabling TTY (Text Telephone) communication, as it provides a link between individuals who use TTY devices and those who communicate using standard voice calls. TRS operators act as an intermediary, translating the text from the TTY device into spoken language and vice versa. This service ensures effective communication for individuals who are deaf, hard of hearing, or have speech disabilities, thereby facilitating access to critical information and services.

Moreover, TRS is specifically designed to accommodate TTY users, making it the most appropriate choice among the options listed. Other technologies, while useful in various communication contexts, do not provide the same level of support for TTY communication as TRS does.