XDR (Extended Detection and Response)

In telecommunications, XDR correlates telemetry from multiple layers (endpoints, OAM hosts, virtualization platforms, signaling probes, NF logs) into a unified detection and response workflow. In a telecom XDR, signaling events such as anomalous SRI-SM, ATI, or N32 traffic are joined with host and identity events to expose multi-stage attacks.

Categories: SignalingRoaming and InterconnectIdentity and Subscriber

XDR in context

Signaling protocols carry the control-plane messages that set up calls, register subscribers 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 as top-tier telecom risk.

Roaming and interconnect are where two operators exchange signaling and user-plane traffic. Trust boundaries here are the primary attack surface for location tracking, SMS interception and fraud, which is why GSMA now mandates SEPP with PRINS on 5G interconnect.

To place XDR in the wider telecom-security picture, review Behavioral Signaling Detection, FS.11, GRE, Roaming, Roaming Interconnect Security and Roaming Security Assessment — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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