Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2007-07-27
2010-11-23
Phan, Hanh (Department: 2613)
Optical communications
Multiplex
Broadcast and distribution system
C398S068000, C398S071000, C398S100000, C398S017000, C370S392000, C370S395400, C370S468000, C370S230000, C370S235000
Reexamination Certificate
active
07840137
ABSTRACT:
A station-side apparatus adapted for use in a passive optical network (PON) system is disclosed, which remotely collects inside information of optical network terminals (ONTs) even before completion of start-up of an optical network unit (ONU), permits an obstruction-detected ONU to send out an emergency notification message to the station-side apparatus, e.g., optical line terminal (OLP), and permits the OLT that received this message to interrupt the transmission of an upload signal toward another ONU after the elapse of a fixed length of time while at the same time receiving information from the obstruction-suffering ONU to thereby facilitate cut-and-divide or “segmentation” of obstruction. A subscriber-side device for use in the PON system is also disclosed.
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Japanese Office Action, with English translation, issued in Japanese Patent Application No. 2007-124080, mailed Aug. 25, 2009.
Kazawa Tohru
Nishino Ryosuke
Sakamoto Ken'ichi
Hitachi , Ltd.
McDermott Will & Emery LLP
Phan Hanh
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