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. The common thread is that most attacks exploit the inherited trust model of legacy signaling protocols.

Telecom fraud costs operators an estimated $40+ billion per year. Common vectors include IRSF, Wangiri callback scams, SIM box bypass, PBX hacking and A2P grey routing.

To place PBX Dial-Through Fraud in the wider telecom-security picture, review A5/2, Artificial Traffic Inflation, ASN, BGP, BGP Hijacking and CGNAT — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.