PBX Dial-Through Fraud

In telecommunications, PBX Dial-Through Fraud is the abuse of poorly secured PBX features (default passwords, open DISA, voicemail call-back) to place outbound international or premium-rate calls at the victim's expense. It is closely related to toll fraud and IRSF.

Categories: Threats and AttacksFraudInternet and Routing

PBX Dial-Through Fraud in context

Telecom threats range from opportunistic SMS phishing and SIM swap to nation-state grade location tracking and lawful-interception abuse. The common thread is that most attacks exploit the inherited trust model of legacy signaling. SS7 and Diameter were designed for a closed operator community that no longer exists.

Telecom fraud costs operators an estimated $40+ billion per year. Common vectors include International Revenue Share Fraud (IRSF), Wangiri callback scams, SIM box bypass, PBX hacking, subscription fraud and A2P grey routing. Effective defense combines real-time signaling analytics with CDR-side machine learning.

To place PBX Dial-Through Fraud in the wider telecom-security picture, review PBX Toll Fraud, OTT Bypass, Wangiri, Flash Call Fraud, PBX Hacking and Toll Fraud.

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