United States of America v. Hilton Worldwide Inc. - Consent Decree

(iii) The hotel has the required number of rooms for guests with hearing impairments, as set forth in ADA Standards §§ 9.1.2 and 9.1.3, that comply with ADA Standards § 9.3. Compliance with ADA Standards § 9.3 may be achieved by either providing (1) visual alarms that are connected to the building emergency alarm system, and visual notification devices for incoming telephone calls and door knock or bell, or (2) portable visual notification devices for the alarm, incoming telephone calls, and door knock or bell. If the hotel uses portable devices to meet these requirements, it shall have at the property a sufficient number of portable devices to ensure that it can fully equip the number of rooms for guests with hearing impairments required by ADA Standards §§ 9.1.2 and 9.1.3 ( i.e., permanently installed telephones that have volume control and an accessible electrical outlet within 4 ft. of a telephone connection).