The remote unit contains a mini test head which was capable of testing both of the lines between the RU and subscriber for faults, it would then communicate the results back to the EU digitally where mimics were presented to the normal exchange testing equipment.
The remote unit contains a mini test head, it would then communicate the results back to the EU digitally. This mini test head was capable of testing both of the lines between the RU and subscriber for faults. Mimics were presented to the normal exchange testing equipment.