Security & Compliance
Ref: GSMA Fraud Prevention Group / ITU-T E.212
Wangiri Fraud
One Ring and Cut (Telephony Fraud)
Direct Telecom Definition • Carrier Industry Standard
A telecom fraud scheme where automated dialers generate short, unanswered calls from high-cost premium rate numbers to entice victims to call back.
Technical Definition & Carrier Engineering Standards
Wangiri (Japanese for "one ring and drop") exploits international revenue sharing (IRSF) arrangements. Carrier Softswitches block Wangiri by detecting burst call patterns with zero ACD and auto-quarantining unallocated international prefixes.