BSS (Business Support System)

The software systems and processes handling business operations in telecommunications including billing, customer relationship management, order management, product catalog, and revenue assurance. BSS systems interface with OSS (Operations Support Systems) to enable end-to-end service delivery and monetization.

Categories: Radio Access NetworkOperations and BusinessInternet and Routing

BSS 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 BSS in the wider telecom-security picture, review Mediation System, 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.