Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2006-05-02
2006-05-02
Phan, Hanh (Department: 2638)
Optical communications
Multiplex
Broadcast and distribution system
C398S070000, C398S072000, C398S066000, C398S067000, C398S068000, C398S079000, C455S003010, C455S001000, C455S001000, C725S129000, C725S119000, C725S127000, C725S114000, C725S149000, C725S120000, C725S111000, C725S126000, C725S105000, C370S352000, C370S389000, C370S476000, C370S400000, C370S535000, C370S474000
Reexamination Certificate
active
07039317
ABSTRACT:
A reconfigurable node for a hybrid fiber cable network includes fiber slots housing a transmitter or receiver interfacing to a head end, coax slots housing an RF brick interfacing with subscribers and RF plug-in modules providing connectivity between the fiber and coax slots. The plug-in modules include connection points, for connection to a fiber or coax slot. A fiber impedance element, associated with the transmitter or receiver in that fiber slot, is connected to each fiber slot. Each fiber impedance element has a different impedance value. A coax impedance element, associated with the RF brick in that coax slot, is connected to each coax slot. Each coax impedance element has a different impedance value. An impedance sensing circuit detects a DC level associated with each connection point which corresponds with the impedance element in a respective fiber or coax slot to determine the location of transmitters, receivers or RF bricks.
REFERENCES:
patent: 6577414 (2003-06-01), Feldman et al.
patent: 6751417 (2004-06-01), Combs et al.
Akin Gump Strauss Hauer & Feld & LLP
General Instrument Corporation
Phan Hanh
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