CA Gov't Code Section 53112

(a)

All systems shall be designed to meet the specific requirements of each community and public agency served by the system. Every system, whether basic or sophisticated, shall be designed to have the capability of utilizing at least three of the methods specified in Sections 53103 to 53106, inclusive, in response to emergency calls. The Legislature finds and declares that the most critical aspect of the design of any system is the procedure established for handling a telephone request for emergency services.

(b)

In addition, to maximize efficiency and utilization of the system, all pay telephones within each system shall, by December 31, 1985, enable a caller to dial “911” for emergency services, and to reach an operator by dialing “0”, without the necessity of inserting a coin. At those “911” public safety answering points serving an area where 5 percent or more of the population, in accordance with the latest United States census information, speak a specific primary language other than English, operators who speak each such other language, in addition to English, shall be on duty or available through interagency telephone conference procedures at all times for “911” emergency services.

(c)

In addition, all systems shall require installation of a telecommunications device capable of servicing the needs of the deaf or severely hearing impaired at the “911” public safety answering point or points. The device shall be compatible with devices furnished by telephone corporations pursuant to Section 2881 of the Public Utilities Code.