4TEL^®

DT-Demand Test

The 4TEL product line builds on the established copper loop testing and analysis platform called 4TEL Demand Test (DT). 4TEL DT is a comprehensive suite of tests that characterize the line from the exchange to the premises terminations. Measurements are made between each leg of the pair, from each leg to ground and from each leg to office battery.

Specific measurements include:

• Parametric Measurements
  • AC and DC Volts
  • Resistance (metallic faults)
  • Capacitance
  • Admittance, including Conductance and Susceptance
• Cable Length
• Cable Balance
• Line Terminations
  • Electro-mechanical Ringers
  • Electronic Ringers
  • Other Premises Equipment
  • Receiver Off Hook
• Basic Equipment Signatures

The 4TEL DT result is presented to the user as a natural language dispatch statement that provides an easily understood, high-level summary of the test. The dispatch is available quickly, allowing call center personnel to verify customer-reported problems immediately, and includes the information necessary to schedule repair activities.

For instances where unusual conditions are present, detailed measurement data is also available for use by a technical expert in further analyzing the problem.