Telephonic communications – Subscriber line or transmission line interface – Power supply
Reexamination Certificate
2005-03-01
2005-03-01
Mei, Xu (Department: 2644)
Telephonic communications
Subscriber line or transmission line interface
Power supply
C379S395010
Reexamination Certificate
active
06862353
ABSTRACT:
A system and method is provided for supplying power over a home phone line network in a manner that is interoperable with other voice and data services operating on the same network. The system includes a power source coupled to the home phone line network. The power source includes an AC signal generator that generates an AC signal at a selected frequency. The power source also includes a band pass filter for removing unwanted harmonics from the AC signal, thereby generating a filtered AC signal for powering one or more devices on the home phone line network. One or more devices attached to the home phone line network, such as a telephone adapter or telephone, receives the filtered AC signal. Each device comprises a second band pass filter and an AC/DC converter. The second band pass filter passes the filtered AC signal to the AC/DC converter and prevents the introduction of undesired harmonics onto the home phone line network from the AC/DC converter. The AC/DC converter converts the filtered AC signal to a DC signal used for powering the device.
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“Ethernet Uebers Heimische Telefonnetz” Elektronik, Franzis Verlag GMBH, Munchen, DE, vol. 48, No. 17, dated Aug. 24, 1999, pp. 20 and 22.
Copy of International Search Report issued Oct. 9, 2002 for Appln. No. PCT/US01/13030, 6 pages.
Caine Steven L.
Gleiter John H.
Miller Kevin L.
Rabenko Theodore F.
Wier Charles G.
Briney, III Walter F.
Broadcom Corporation
Mei Xu
Sterne Kessler Goldstein & Fox PLLC
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