Title 47 › CHAPTER 5 — WIRE OR RADIO COMMUNICATION › SUBCHAPTER VI — MISCELLANEOUS PROVISIONS › § 623
Companies that make, import, sell, or rent multi-line phone systems must only offer systems that are set up so any phone on the system can call 9–1–1 directly. Users must be able to dial 9–1–1 without entering any extra number, code, prefix, or suffix — for example the "9" often used to get an outside line — even if other calls need those extra digits. Installers, managers, and operators must configure systems the same way when they put them in or run them. If the system can do it without hardware or software upgrades, it must also be set to send a notification to a central place in the building or to another person or organization. State or local emergency authorities keep their powers unless they conflict with this federal rule. Enforcement follows the law’s normal enforcement rules, with section 501 used only for fines. "Multi-line telephone system" is defined in section 1471.
Full Legal Text
Telegraphs, Telephones, and Radiotelegraphs, Source: USLM XML via OLRC
Legislative History
Reference
Citation
47 U.S.C. § 623
Title 47, Telegraphs, Telephones, and Radiotelegraphs
Last Updated
Sep 22, 2026
Release point: 119-110