Which type of device can a person requesting assistance use to connect directly to a telecommunicator?

The appropriate device a person requesting assistance can use to connect directly to a telecommunicator is a TDD, also known as a Telecommunications Device for the Deaf. This device is specifically designed for individuals who are deaf or hard of hearing, allowing them to communicate effectively with emergency services through typed messages. It connects directly to the telecommunications system, enabling the person to relay information and request assistance without needing to rely on verbal communication.

In comparison, fire alarm boxes are typically used to report emergencies and alert the fire department but do not facilitate direct communication with a telecommunicator. Code boxes are generally used for internal communications within facilities for alarm systems, and are also not meant for direct telecommunicator interaction. Call boxes may allow direct dialing to emergency services, but they are not as specifically focused on assisting individuals with hearing impairments as TDDs are, making TDD the most suitable choice for direct communication in this context.