Telephony Denial of Service Attacks Can Disrupt Emergency Call Center Operations

Publisher

Federal Bureau of Investigation, Internet Crime Complaint Center

URL

https://www.ic3.gov/PSA/2021/PSA210217

Published

2021-02-17

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

US federal government work; public domain in the US; public domain; attribute FBI IC3

Source notes citing this source

• The FBI distinguishes manual TDoS, organized through social networks, from automated TDoS, where software places tens or hundreds of calls at once or in rapid succession, including over VoIP and SIP, often with spoofed caller information. in context
• The FBI defines a TDoS attack as an attempt to make a telephone system unavailable to its intended users by preventing incoming and/or outgoing calls. in context
• The FBI PSA names hacktivism, financial extortion and harassment as motives behind TDoS attacks on emergency call centers. in context
• The FBI asks for TDoS attacks to be reported to IC3 or a local FBI field office, using the keywords TDOS, PSAP and Public Safety in the complaint. in context

Cite this source record

APA

WarmTransfer. (2021, February 17). Telephony Denial of Service Attacks Can Disrupt Emergency Call Center Operations. WarmTransfer. https://warmtransfer.net/knowledge/sources/ic3-psa-210217-tdos

BibTeX

@misc{warmtransfer-ic3-psa-210217-tdos,
  title  = {Telephony Denial of Service Attacks Can Disrupt Emergency Call Center Operations},
  author = {{WarmTransfer}},
  year   = {2021},
  url    = {https://warmtransfer.net/knowledge/sources/ic3-psa-210217-tdos},
  note   = {Federal Bureau of Investigation, Internet Crime Complaint Center, accessed 2026-09-25}
}