scope:

One of the objectives of the Commercial Mobile Alert System (CMAS) is to define a set of requirements for the behavior of the mobile devices whenever a CMAS emergency alert is received. This specification defines a common set of requirements for GSM, UMTS, and CDMA based mobile devices. Implementation of the requirements contained within this specification is mobile device manufacturer dependent.

Even though the scope of CMAS includes paging systems, the behavior of paging devices for CMAS alert messages is not contained within this specification.

Purpose

The purpose of this specification is to define the common set of requirements for GSM, UMTS, and CDMA based mobile devices behavior whenever a CMAS alert message is received and processed. A common set of requirements will allow for a consistent user experience regardless of the associated wireless technology of the mobile device. Additionally, this common set of requirements will allow the various local, state, and Federal level government agencies to develop subscriber CMAS educational information that is independent of the wireless technology.

Application

This specification focuses on the mobile device behavior associated with the receipt and processing of the CMAS alert messages on CMAS compliant mobile devices.