Under the Americans with Disabilities Act, communications centers must be able to receive calls by which medium?

Under the Americans with Disabilities Act, communications centers must be able to receive calls by which medium?

• A. Personal digital assistant (PDA)
• B. Walk-in
• C. Radio transmission
• D. TTY/TDD

Answer: (D)

The key idea here is accessibility of emergency communications for people who are deaf or hard of hearing. Under the ADA, communications centers must be reachable by all callers, including those who rely on text-based devices. A TTY/TDD provides a teletypewriter interface over the telephone network, allowing a caller to type messages and receive responses in text. This enables two-way communication without relying on voice. Personal digital assistants are general handheld devices, not a designated method for receiving calls at a center. Walk-ins involve people coming in person, not making a call, and radio transmission is the dispatch channel used internally, not a method for receiving telephone calls from the public. Therefore, the required medium for receiving calls is the TTY/TDD.

The key idea here is accessibility of emergency communications for people who are deaf or hard of hearing. Under the ADA, communications centers must be reachable by all callers, including those who rely on text-based devices. A TTY/TDD provides a teletypewriter interface over the telephone network, allowing a caller to type messages and receive responses in text. This enables two-way communication without relying on voice.

Personal digital assistants are general handheld devices, not a designated method for receiving calls at a center. Walk-ins involve people coming in person, not making a call, and radio transmission is the dispatch channel used internally, not a method for receiving telephone calls from the public. Therefore, the required medium for receiving calls is the TTY/TDD.