Call Guardian

TNS Call Guardian is an industry-leading call analytics solution that uses cross carrier real-time call events combined with crowd-sourced data to create accurate and comprehensive reputation profiles differentiating legitimate users of communications services from abusive, fraudulent and unlawful users. TNS Call Guardian is the most accurate reputation profile solution using a layered approach, big data analytics and integration of call attestation parameters from STIR/SHAKEN to deliver a better customer experience for consumers.

Deployment Options

  • Various Levels of Network Integration:
    • Lowest Level – relies entirely on the data TNS sees across its intercarrier signaling and routing directories
  • Other Levels of Integration:
    • Data feed from VoLTE registry route requests
    • Rehome SS7 routes to TNS (all or “spammy” routes)
    • Integration with the TAS for call events
    • Sniff call events at the SBC
    • Data feed of assigned/unassigned numbers
    • Integration with TAS or VS to receive verstat information
  • Carrier deployed STIR/SHAKEN solution – ingestion of verstat parameter into Call Guardian analytics engine
  • Full STIR/SHAKEN solution in hosted environment
  • Full STIR/SHAKEN solution on-premise
  • Pre-SHAKEN/STIR solution that authenticates calls originating from networks that use TNS Signaling Hub

Click here to learn more about Call Guardian STIR/SHAKEN capabilities.

Key Features

  • Supports multiple protocols (ENUM, SIP, AIN, REST, NGN, CAMEL, ISC)
  • Full compliance with standards in ATIS test bed
    • STIR: RFC 8224, RFC 8225, RFC 8226
    • SHAKEN: ATIS 1000074, ATIS 1000080, ATIS 1000082
  • Carrier deployed service model (no OTT)
    • 3 of top 5 wireless carriers
    • Tier 1 landline carrier
    • Active trials with cable MSOs
  • Insight with analysis of over 1 billion call events daily across more than 500 operators
  • Reputation profiles on over 1 billion telephone numbers
  • Real-time scoring that detects problems as they occur
  • Accuracy with high quality of identifying bad actors, including neighbor spoofing
  • Layered approach with support for Do Not Originate, invalid, unallocated, unassigned numbers, STIR/SHAKEN and big data analytics using machine learning
  • Data encryption, consumer & carrier privacy policies maintained

Key Benefits

  • Attestation – ingests parameters from STIR/SHAKEN to provide improved call management for your subscribers
  • Network Savings
    • Leverage signaling protocols for more scalable approach
    • Helps to reduce network costs rather than adding components
  • Reduce calls into customer care by providing your subscribers with caller reputation of incoming calls and reduce the number of reported spam calls into your care organization
  • Reduce customer churn by decreasing the chance of your subscribers falling prey to scams and fraud
  • Increase Net Promoter Score by providing your subscribers with the tools to combat unwanted calls

TNS Call Guardian is being used by some of the world’s largest operators, including:

Verizon – Call Filter

Sprint – Call Screener

US Cellular – Call Guardian

C Spire – Free robocall filtering

Inland Cellular – Deploys TNS Call Guardian

Allstream –