230 and 708 Two-Way Communication Systems
New provisions of the 2010 Standards at sections 230.1 and 708 require two-way communications systems to be equipped with visible as well as audible signals.
230.1 General. Where a two-way communication system is provided to gain admittance to a building or facility or to restricted areas within a building or facility, the system shall comply with 708.
Advisory 230.1 General. This requirement applies to facilities such as office buildings, courthouses, and other facilities where admittance to the building or restricted spaces is dependent on two-way communication systems.