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False answer supervision (FAS) refers to VoIP fraud where the billed duration for the caller is more than the duration of the actual connection duration. The FAS is usually performed by VoIP wholesalers in their softswitches for randomly selected calls. Adding a small amount of extra billed seconds for many calls results in significant revenue for the VoIP wholesaler.
The FAS fraud can be implemented in a softswitch in many different ways. [1] These include:
The FAS can be detected and blocked in a softswitch. Common methods are:
Fake False Answer Supervision Service at voip-info.org RouteMonitor FAS detection with AI Detect 99.9% FAS for VoIP carriers/wholesale and CC traffic RouteInspector Automatic FAS detection service for VoIP carriers