Subscriber’ telephone lines after leaving MDF towards subscriber’s position may pass through different environments and depending on the distance it may pass through underground ducts. Cables usually pass through road channels.

The fact that power cables, gas pipes, and water pipes also use the same path makes telephone lines vulnerable to following defect categoris.

• Excessive AC Voltage
• Excessive DC Voltage
• Abnormal line capacitance
• Insufficient or excessive lien resistance

CARIN-LT1 can test subscriber lines and identify the defect.