Bruce Perens - A Cyber-Attack on an American City: "Although they are silent on the topic, I hope those responsible for emergency services, be they in business or government, are learning the lessons of Morgan Hill. The first lesson is what stayed up: stand-alone radio systems and not much else. Cell phones failed. Cellular towers can not, in general, connect phone calls on their own, even if both phones are near the same tower. They communicate with a central switching computer to operate, and when that system doesn't respond, they're useless. But police and fire authorities still had internal communications via two-way radio.
Realizing that they'd need more two-way radio, authorities dispatched police to wake up the emergency coordinator of the regional ham radio club, and escort him to the community hospital with his equipment. Area hams dispatched ambulances and doctors, arranged for essential supplies, and relayed emergency communications out of the area to those with working telephones."
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