Rf / Ro (Diameter Charging Reference Points)

Rf / Ro in context

Signaling protocols carry the control-plane instructions that set up calls, register subscribers, hand over sessions and route SMS. SS7, Diameter, GTP-C and SIP are the four dominant families, and interconnect exposure of any of them is treated by GSMA FS.11 / FS.19 / FS.20 as a top-tier telecom risk.

OSS/BSS platforms (provisioning, charging, mediation, order management) hold the highest-value subscriber and revenue data on the operator side. They are heavily targeted for fraud and insider abuse and are increasingly in scope for regulatory obligations like NIS2 and the UK Telecoms Security Act.

To place Rf / Ro in the wider telecom-security picture, review Rx Interface, Charging System, Control Plane Security, Diameter, 5G Reference Points and O1 Interface.

Related terms

• Rx Interface
• Charging System
• Control Plane Security
• Diameter
• 5G Reference Points
• O1 Interface
• PCRF
• GTP

Related topic hubs

• Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.
• VoLTE Security IMS/VoLTE signaling risk: SIP, IMS-AKA, media plane attacks.
• Diameter Security 4G/LTE Diameter threats across IPX/roaming and DEA defenses.
• Diameter Firewall GSMA FS.19 screening at the Diameter Edge Agent on S6a/S9/S13.

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.