Abstract: A power management circuit for a remote access platform extracts power from a wireline for powering a ring generator that generates a ringing voltage signal that is distributed to a plurality of subscriber circuits. A power-limited voltage converter steps up the wireline voltage to a higher ‘isolating’ voltage, charging a capacitor coupled to the ring generator. A monitor circuit reduces the power that the power-limited voltage converter can draw, if the wireline voltage drops too low. This prevents the wireline voltage from collapsing should the remote terminal be deployed at a distance from wireline voltage source (the central office) greater than its specified capability.

Abstract: The present invention of a power supply and battery back-up system includes an AC/DC power supply and a battery for supplying operating power to a telecommunications system. The battery is connected to the telecommunications system and is designed to supply the telecommunications system with operating power if the power supply fails for some reason. The power supply is designed to output the peak operating power required by the telecommunications system, supplying the telecommunications system with whatever operating power it needs and supplying the difference between the operating power supplied to the telecommunications system and the peak operating power output by the power supply to the battery for charging. In one embodiment, the battery back-up system includes a battery monitoring circuit for monitoring the battery voltage and a relay connected between the battery and the telecommunications system for disconnecting the battery if the battery voltage falls below a pre-set level.

Abstract: The present invention of a power supply and battery back-up system includes an AC/DC power supply and a battery for supplying operating power to a telecommunications system. The battery is connected to the telecommunications system and is designed to supply the telecommunications system with operating power if the power supply fails for some reason. The power supply is designed to output the peak operating power required by the telecommunications system, supplying the telecommunications system with whatever operating power it needs and supplying the difference between the operating power supplied to the telecommunications system and the peak operating power output by the power supply to the battery for charging. In one embodiment, the battery back-up system includes a battery monitoring circuit for monitoring the battery voltage and a relay connected between the battery and the telecommunications system for disconnecting the battery if the battery voltage falls below a pre-set level.