11B-708 Two-Way Communication Systems — 2025 California Building Code
California Building Code (Title 24, Part 2) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Building Code (Title 24, Part 2) § 11B-708 · Effective January 1, 2026 · Official source: Building Standards Commission
11B- 708.1 General. Two-way communication systems shall comply with Section 11B- 708 .
11B- 708.2 Audible and visual indicators. The system shall provide both audible and visual signals.
11B- 708.3 Handsets. Handset cords, if provided, shall be 29 inches ( 737 mm) long minimum.
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-112 2025 CALIFORNIA BUILDING CODE
ACCESSIBILITY TO PUBLIC BUILDINGS, PUBLIC ACCOMMODATIONS, COMMERCIAL BUILDINGS AND PUBLIC HOUSING
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.
ACCESSIBILITY TO PUBLIC BUILDINGS, PUBLIC ACCOMMODATIONS, COMMERCIAL BUILDINGS AND PUBLIC HOUSING
DIVISION 8: SPECIAL ROOMS, SPACES AND ELEMENTS
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