1613-03: Power Failure Recovery Detect Timer
Use this option to set the Power Failure Recovery Detect time. When the ATRU or COIU PCB recovers from
a power failure, it checks the power failure line for loop current for this interval. If loop current is
detected, it assumes the power failure telephone is still connected and does not tear down the call. If loop
current is not detected, the PCB switches the line out of the power failure mode.