The Analog Line Tester Series of Hand-held Transmission Testers combine the functions of a Transmission Interference Measurement Set (TIMS) instrument, a digital multimeter measurement (DMM) instrument and the function of a telephone
handset with dial/talk/listen capabilities into one compact unit for simple operation and ensures the most cost effective solution on the market. This feature selection guide is intended to give a clear and rapid indication of the functions available in the ALT-500 or ALT-1500.

  Features: 

• Background Noise measurements with C-message
  (Psophometric), D, E, F, and G Filters.
• Selective Level/Crosstalk measurements
  (Programmable and Fixed frequencies), sine wave
  generator, precision frequency
  counter, automatic frequency sweep, level meter.
• Wideband two-ended Insertion Loss
  measurements up to 500KHz. (up to 1.5MHz for
  ALT-1500).
• RS232-C serial interface for Printer and Remote
  Control.
• Power Influence (Harmonic frequencies of power).
• Wideband Impulse Noise measurements.
• Telephone Handset / DTMF Tone Detector.
• Impedance / Return Loss measurements.
• Intelligent Battery Charging Control.
• Multimeter Measurement Analysis Test
         Loop Capacitance and Resistance
         Longitudinal Balance
         Foreign Voltages

Please check PDF document for more details.