Telecom Security

Call Filter (Anti-Fraud & Validation)

Protect your telephony routing network against nuisance traffic, unauthorized CLI spoofing, and automated spam robocalls with sub-2 millisecond inline call inspection.

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High-Throughput Inline Protection

Cloudfonica Call Filter operates seamlessly between client ingress and provider termination, evaluating calling party numbers, duration anomalies, and call attempt bursts in real time:

• Sub-2ms Lookup Latency: Zero audible delay introduced to call setup time (PDD).
• Dynamic Blacklist / Whitelist: Automatically drops invalid prefixes, known malicious callers, and spoofed CLI traffic.
• Comprehensive CDR Analytics: Real-time visibility into blocked attempts, filter triggers, and volume trends.

Download the full Call Filter Technical Manual (PDF).