By Robin Hattersley Gray · October 18, 2010
The Commercial Mobile Alert System (CMAS) is scheduled to go into effect starting in 2012 and will enable consumers to receive emergency alerts through their wireless phones. CMAS uses broadcast technology to deliver messages. This approach, which has been in use in Europe and Japan for years, eliminates the throughput/network traffic challenges experienced by many SMS solutions.
The first generation will only be able to send messages that are no more than 90 characters in length. In other words, initially, CMAS messages will be even shorter than current SMS messages. Thus, the content of the CMAS notifications will be very limited. They will basically drive recipients to other sources of information, like the Web, television or radio.
According to FEMA, under the rules adopted by the FCC:
- “The CMAS would consist of an end-to-end system by which an alert aggregator/gateway would receive, authenticate, validate and format federal, state, tribal and local alerts and then forward them to the appropriate commercial mobile service (CMS) provider gateway. The CMS provider gateway and associated infrastructure would process the alerts and transmit them to subscriber handsets.
- “Subscribers could receive up to three classes of text-based alerts (i.e., Presidential, Imminent Threat (e.g., tornado) and Amber Alerts).
- “Subscribers would automatically receive these alerts if they have a CMAS-compatible handset. No subscriber opt-in requirements.
- “To ensure that people with disabilities have access to alerts, CMS providers must provide a unique audio attention signal and vibration cadence on CMAS-compatible handsets.
- “CMS providers generally must transmit alerts to areas no larger than the targeted county. However, CMS providers may transmit to areas smaller than the county if they choose to do so.
- “Subscribers receiving services pursuant to a roaming agreement will receive alert messages if: (1) the operator of the roamed upon network is a participating CMS provider; and (2) the subscriber’s mobile device is configured for and technically capable of receiving alert messages from the roamed-upon network.
- “CMAS messages will not pre-empt calls in progress.”
CMAS is set up in such a way that all of the major CMS providers will be participating, although some of the smaller carriers might not.