Prerequisite Courses:  Countermeasures Core Concepts


This five-day digital telephone course builds upon the Countermeasures Core Concepts course and provides in-depth instruction on digital telephone system testing and analysis for technical threats, including the operation of the TALAN Telephone and Line Analyzer.


Course DatesReserve Your Spot
October 18, 2021 - October 22, 2021Register
November 8, 2021 - November 12, 2021Register
December 6, 2021 - December 10, 2021Register

Note: Training begins at 8:30 a.m. CST and typically ends at 4:30 p.m.


  • Telephone system characteristics and vulnerabilities
  • Countermeasure tests:
    • Frequency Domain Reflectometry (FDR)
    • Voltage/ohms tests
    • Digital demodulation and audio detection
    • Non-Linear Junction Detection (NLJD) on a wire
    • Digital telephone countermeasure analysis procedures
    • Other line testing and analysis

Registration: US$1,895 per student (multi-course discount available)