Telephonic communications – Subscriber line or transmission line interface – Power supply
Reexamination Certificate
2008-01-08
2008-01-08
Singh, Ramnandan (Department: 2614)
Telephonic communications
Subscriber line or transmission line interface
Power supply
Reexamination Certificate
active
07317793
ABSTRACT:
A system for providing DC power on local telephone lines, such as telephone lines in a building or office, for powering devices and circuitry associated with communications over those telephone lines, as well as other functions. Desired voltage and power levels are supplied over local telephone lines by separating the DC power component from the central office or private branch exchange with a DC blocking filter while passing all AC telephony signals. A distinct DC power is then imposed over the telephone line for powering both the telephony service as well as other loads. Conventional telephone off-hook detection is simulated for compatibility with the central office or private branch exchange. The functions required may be integrated, partially or fully within a telephone outlet.
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Binder Yehuda
Hazani Ami
Kofman Semion
Browdy and Neimark PLLC
Serconet Ltd
Singh Ramnandan
LandOfFree
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