Fraud Types
The unauthorized use of a phone system or account to place calls that someone else has to pay for, usually to expensive international destinations.
Toll fraud is the umbrella term covering compromised PBXs, stolen SIP credentials, hijacked trunks, and subscriber accounts opened with fake identities. The end goal is almost always to monetize traffic through revenue-share destinations.
Attacks cluster in evenings, weekends, and holidays, when nobody is watching the switch, and can generate tens of thousands of dollars of exposure in a single night.
Toll fraud losses are usually not recoverable from the upstream carrier. Spend caps, destination allow-lists, and real-time velocity alerting are cheaper than the first incident.
Breaking into a business phone system or SIP trunk — usually through weak credentials or an exposed port — to place fraudulent outbound calls.
Fraud in which criminals drive traffic to expensive international premium numbers they control and take a share of the termination revenue.
Routing international calls over the internet and re-injecting them into a local mobile network through banks of SIM cards, bypassing legitimate interconnect fees.
The rate at which new call attempts are offered to a network, and one of the clearest early indicators of an automated dialing campaign.
SipShield scores live SIP traffic with patented AI so the controls behind this term run automatically — and leave the audit trail regulators expect.