Protecting America’s NextGen 911 Networks

Cyber Risks to 911: Telephony Denial of Service

Telephony Denial of Service (TDoS) events can overwhelm call capacity and disrupt communications when a large volume of telephone calls overloads a communications network element.

Whether malicious (e.g., cyber attack) or accidental (e.g., malfunctioning equipment), TDoS events present a unique challenge for public safety stakeholders, specifically emergency communications centers (ECCs)/public safety answering points (PSAPs).

Learn more about the Public Safety Communication TDoS Risks and best practices by downloading the latest CISA TDoS Fact Sheet.