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1. WO2002021818 - VARIABLE LOW FREQUENCY OFFSET, DIFFERENTIAL, OOK, HIGH-SPEED TWISTED PAIR COMMUNICATION

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[ EN ]

CLAIMS
What is claimed is:
1. A method for transmitting data over a twisted pair network using a differential voltage, frequency offset, OOK transmission, the method comprising:
receiving a data signal from a data source device;
providing a base frequency carrier;
controlling states of the base frequency carrier, the carrier states including an on state and an off state;
transmitting the data signal, using the base frequency carrier, to a twisted pair wire via a twisted pair coupler;
receiving the transmitted data signal from the twisted pair wire by a twisted pair decoupler; and
sending the data signal to a data receiving device.

2. The method of claim 1 further comprising transferring the data signal to a POTS analog connection for emergency services when power in the twisted pair network is turned off.

3. The method of claim 1 further comprising transmitting control and timing information within a serial bit stream.

4. The method of claim 1 wherein the data signal is transmitted from the data source device to the data receiving device over the twisted pair network at a rate equal to an output rate of the data source device plus a transmission control overhead.

5. The method of claim 1 wherein a frequency of the base frequency carrier is set according to a minimum signal to noise ratio.

6. The method of claim 1 wherein the data signal is transmitted using the base frequency carrier as a forward biased low frequency wave.

7. A transmission system for transmitting data from a data source device to a data receiving device over a twisted pair network using a differential voltage, frequency offset, OOK transmission, the system comprising:
a transmitter to receive a data signal from the data source device, to provide a base frequency carrier, to control states of the base frequency carrier, the carrier states including an on state and an off state, and to transmit the data signal, using the base frequency carrier, to a twisted pair wire via a twisted pair coupler; and
a receiver, coupled to the transmitter, to receive the transmitted data signal from the twisted pair wire by a twisted pair decoupler and to send the data signal to a data receiving device.

8. The system of claim 7 wherein the transmitter is configured to transfer the data signal to a POTS analog connection for emergency services using an AC relay when power in the twisted pair network is turned off.

9. The system of claim 7 wherein the transmitter is configured to transmit control and timing information within a serial bit stream.

10. The system of claim 7 wherein the transmitter is configured to transmit the data signal to the data receiving device over the twisted pair network at a rate equal to an output rate of the data source device plus a transmission control overhead.

11. The system of claim 7 wherein a frequency of the base frequency carrier is set according to a minimum signal to noise ratio.

12. The system of claim 7 wherein the data signal is transmitted using the base frequency carrier as a forward biased low frequency wave.