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FBI Notification- Telephony Denial of Service Attacks and Disruption of Emergency Call Center Operations

The Federal Bureau of Investigation (FBI) is issuing a Private Industry Notification (PIN) to provide awareness regarding Telephony Denial of Service (TDoS) attacks. TDoS attacks affect the availability and readiness of 911 call centers and can undermine public trust in emergency services.

A TDoS attack is an attempt to make a telephone system unavailable to the intended user(s) by preventing incoming and/or outgoing calls. The objective is to keep the distraction calls active for as long as possible to overwhelm the victim’s telephone system, which may delay or block legitimate calls for service. The resulting increase in time for emergency services to respond may have dire consequences, including loss of life.

View the full PIN here.

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