Remote power feed method and system

Details Remote power feed method and system Remote power feed method and system

2005-01-25

2005-01-25

Tieu, Binh (Department: 2643)

Telephonic communications

Subscriber line or transmission line interface

Power supply

C379S001010, C379S009050, C379S324000, C379S348000, C379S413020, C700S286000, C363S146000

Reexamination Certificate

active

06847718

ABSTRACT:
A remote power feeding method allowing efficient remote power feeding into a network termination device in the event of a commercial power failure at a subscriber site is disclosed. When the commercial power failure occurs, a power failure signal is transmitted from the subscriber-side network termination device to the central office-side line termination device. The central office-side line termination device, when receiving the power failure signal, starts DC power feeding to the subscriber-side network termination device via the subscriber line. During the power failure, only voice communication is permitted using previously selected good channels.

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