TALAN Tel/Line Analyzer


The most advanced telephone and line analyzer in existence.

The TALAN Telephone and Line Analyzer provides a complete suite of tools to rapidly and reliably detect and locate illicit tampering and security vulnerabilities on both digital and analog telephone systems.


  • Combines multiple testing capabilities into a single piece of equipment
  • Automatic internal pair switching matrix performs tests on all pair combinations
  • Multimeter tests (voltage, current, resistance, capacitance)
  • RF Broadband Detector (up to 8GHz)
  • Spectrum Analyzer (up to 85MHz)
  • High Gain Audio Amplifier
  • Bias Generator ±80 VDC
  • Audio Oscilloscope with active input (20Hz to 20KHz)
  • Digital Demodulation to confirm that the telephone line is not passing audio
  • Frequency Domain Reflectometer (FDR) to check for taps on the line
  • Line Non-Linear Junction Detector (NLJD) Functionality to detect electronics connected to a line
  • NLJD Line Trace Probe for tracing wires and locating electronics
  • Multi-Test Database System provides the ability to perform multiple tests, on all pair combinations, storing data in a database for comparison against other lines and historical comparison


Control System

  • Primary Computer: 32bit RISC processor, 520MHz
  • Internal Memory: 64MB SDRAM (OS), 64MB Flash
  • External Memory: Compact Flash to 2GB

Digital I/O

  • USB Device (A type) supports external keyboard, mouse, and USB Mass Storage devices
  • Network: 10/100 Ethernet Controller (for future usability)
  • USB Host (B type, for future usability)

Analog I/O

  • Headphone Output: 3.5mm Mono connector
  • Microphone Input: 3.5mm Mono input

User Interface

  • Hard Keys: 6 Soft Menu Keys, 5 Button Quadrant Navigation & other dedicated keys
  • Encoder: High-Resolution Optical Encoder
  • Integrated Touch Screen with Stylus
  • Dual MOD8: Supports 2, 4, 6, & 8 wire Modular Phone Jacks
  • Banana Type: Standard sleeved sockets: Ring, Tip, and Earth
  • SMB RF Input: RF/Antenna Connection to 8 GHz Broadband Detector
  • Expansion Port: Supports communication & measurement for use with future accessories

RF System

Spectrum Analyzer:

  • Dual Conversion, Super-Heterodyne Receiver
  • Frequency Range: 30kHz to 85MHz
  • Sweep Time: 2 Seconds
  • Step Size: 1kHz
  • Bandwidth: 18kHz
  • Sensitivity: -100dBm

Broadband Detector:

  • RF SMB Input: to 8GHz
  • Line Level Test: 100kHz to 600MHz
  • Sensitivity: -65dBm

Digital Multimeter

  • Range: Quick Response Auto-Ranging, 500msec Sample Rate
  • AC/DC Volts: 0 to 250V Maximum
  • Resistance: 0 to 40 MegOhm
  • Capacitance: 4nF to 4.2µF

Bias Generator

  • Optically Isolated, Direct Digital Control: High voltage DAC
  • Modulation: Fixed voltage, or variable rate Sinewave (10Hz – 300Hz)
  • Output Ceiling: ± 80V


  • Audio Bandwidth: 20Hz – 20KHz
  • Gain: Up to 80dB total system gain (voice band)
  • AGC: Digitally Controlled Automatic Gain
  • Filter: Analog Voice band filter (300Hz to 3kHz)

Power System

  • External Input: 9 – 15VDC @ 3A
  • Universal Power Supply: 100-240VAC, 50-60Hz
  • Removable Battery: Rechargeable Lithium ion, 4-6 hours of run time


  • Dimensions: 10in x 12.9in x 2.7in (25.4cm x 32.8cm x 6.9cm)
  • Unit Weight with Battery: 6 lbs (2.7 kg)
  • Case Dimensions: 5.4in x 14.9in x 19.5in (13.7cm x 37.8cm x 49.5cm)
  • Case Weight (Including TALAN and accessories): 19 lbs (7.1 kg)
  • Operating Temperature: 0°C to +50°C


Digital Demodulation

Includes digital decoding capabilities for approximately 80% of the world’s digital phone systems. The Digital Demodulation function provides the ability to determine if a digital phone line is passing audio when it should not.


Non-Linear Junction Detection (NLJD)

The TALAN includes a NLJD test to detect electronics connected to an isolated line. This is one of the most powerful tests for quickly determining whether or not there are additional electronics attached to a wire. The example to the right indicates a parallel tap on pair 4:5. Because of multiple pair combinations any combination with either a 4 or 5 indicates some response, but the electronics are clearly detected on pair 4:5 with the strongest response.


Digital Multimeter Tests

The TALAN includes basic multimeter tests such as Voltage, Current, Capacitance, and Resistance. The automatic switching matrix allows the user to quickly measure and display results for all pair combinations, easily identifying any anomalies.


Frequency Domain Reflectometer (FDR)

Similar to a TDR (Time Domain Reflectometer) but based on a different technical approach, the TALAN’s FDR can “shoot” a line for impedance anomalies indicating a potential security threat. The FDR also has the ability to plot multiple FDR traces on the same display for comparison of multiple pairs for historical comparison.


RF Analysis and Detection

The TALAN includes a Spectrum Analyzer that provides a detailed frequency spectrum display up to 85 MHz. This function also includes a time domain display to show the modulation for AM and FM signals. The TALAN also includes a Broadband RF Probe to check free space RF energy up to 8GHz, graphing the RF level over time to identify the location of a transmitter.


Amplifier & Oscilloscope

The TALAN includes a High Gain Audio Amplifier (20Hz to 20KHz) with up to 80dB of total system gain (voice band). A DC Bias Voltage Generator (±80VDC) is also provided to power attached electronics.


VoIP Test Features

Built-in VoIP testing capability for internet protocol (IP) packet traffic on VoIP phones and systems. VoIP data collected by the TALAN software includes Source and Destination MAC/IP Addresses; header type; statistics – total packets; packet rate; peak rate and run time.