Mediation System

A telecom system that collects, validates, aggregates, and transforms usage data (CDRs, UDRs) from network elements into formats suitable for billing systems. Mediation systems perform data enrichment, error correction, duplicate detection, and routing to downstream BSS systems. Critical for revenue assurance and billing accuracy.

Categories: Radio Access NetworkOperations and BusinessInternet and Routing

Mediation System in context

The radio access network is where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations and downgrade attacks; defenses rest on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

OSS/BSS platforms hold the highest-value subscriber and revenue data on the operator side, are heavily targeted for fraud and insider abuse, and are in scope for NIS2 and the UK Telecoms Security Act.

To place Mediation System in the wider telecom-security picture, review BSS, 3GPP, A5/3, Billing System, Broadband and CDMA — 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.