2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)
11B-708.4 Residential dwelling unit communication systems.
Communications systems between a residential dwelling unit and a site, building, or floor entrance shall comply with Section 11B-708.4.
11B-708.4.1 Common use or public use system interface.
The common use or public use system interface shall include the capability of supporting voice and TTY communication with the residential dwelling unit interface.
11B-708.4.2 Residential dwelling unit interface.
The residential dwelling unit system interface shall include a telephone jack capable of supporting voice and TTY communication with the common use or public use system interface.
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