초록 ▼

One embodiment of the invention includes an apparatus for providing electric power to a telephone across a transmission line where the telephone is coupled to a network device. A power and data coupler ("the coupler") is coupled to one end of the transmission line. The transmission line is also adap

One embodiment of the invention includes an apparatus for providing electric power to a telephone across a transmission line where the telephone is coupled to a network device. A power and data coupler ("the coupler") is coupled to one end of the transmission line. The transmission line is also adapted for transmission of a data signal. The data signal includes telephone signal data for communications with the telephone. The coupler has a data input and a power input. Power from the power input is coupled to the data signal from the data input and the combined power supply current and data signal is coupled to one end of the transmission line. The opposite end of the transmission line is coupled to a power and data decoupler ("the decoupler"). The decoupler has a power output and a data output. Both the data output and power output of the decoupler are coupled to the network device. The combined power and data signal is decoupled by the decoupler, and the data signal is supplied to the data output and the power is supplied to the power output. The invention also includes a circuit. The telephone circuit receives the power from the power output and receives the telephone signal data. The circuit couples the power and the telephone signal data together to make a combined power and telephone signal, which can be used by the telephone.

대표청구항 ▼

1. An apparatus for providing power to a telephone coupled to a network device, comprising:a transmission line having a proximal end and a distal end, the distal end coupled to the network device; a coupler coupled to the proximal end of the transmission line, the coupler having a data input and a p

1. An apparatus for providing power to a telephone coupled to a network device, comprising:a transmission line having a proximal end and a distal end, the distal end coupled to the network device; a coupler coupled to the proximal end of the transmission line, the coupler having a data input and a power input, the coupler couples power from the power input and the data signal from the data input to the transmission line, the coupled power signal and data signal forming one combined signal, the data signal including telephone bearer data; a decoupler coupled to the distal end of the transmission line, the decoupler having a data output coupled to the network device and a power output coupled to the network device, the decoupler supplies the data signal from the transmission line to the data output and the power from the transmission line to the power output; a circuit coupled to the decoupler and to the data signal, the circuit having a combined telephone and power signal output, the combined telephone and power signal output for outputting a combined signal that is a combination of the power and a telephone data signal corresponding to the data signal; and a power source switch coupled to the telephone, the power source switch having a first input coupled to the power output of the decoupler, the power source switch further having a second input coupled to receive a second power signal from an external power source, and wherein the power source switch is switchable between the first input and the second input to carry power to the telephone from one of at least the decoupler or the external power source.