Multi-pair aggregate power distribution

• US 7,053,501 B1
• Filed: 11/04/2002
• Issued: 05/30/2006
• Est. Priority Date: 11/04/2002
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Barrass, Hugh
• Primary Examiner(s): Sircus, Brian
• Assistant Examiner(s): KAPLAN, HAL IRA
• Application Number:
  US10/287,886
• Time in Patent Office: 1,303 Days
• Field of Search: 307/19, 307/52, 307/29, 307/147
• US Class Current: 307/19
• CPC Class Codes: H02J 1/10 Parallel operation of dc sources
• CPC Class Codes: H04Q 2213/1308 Power supply

Abstract

Apparatus and methods for transmitting power over non-adjacent multiple conducting pairs and aggregating power from the conducting pairs to power a remote electronic device. In an embodiment, the apparatus and method comprises a wiring closet which has power supplying capabilities for providing power to a plurality of conducting pairs. A remote termination is adapted to aggregate power provided to and transmitted by two or more non-adjacent conducting pairs. The aggregated power is supplied to a remote electronic device. Preferably, a plurality of power circuits provide power to the conducting pairs. Preferably one or more rectifier circuits aggregate power from the non-adjacent pairs to the remote electronic device.

Claims

1. A system for providing power to electronic devices, comprising:

a wiring closet having power supplying capabilities for providing power to a plurality of conducting pairs;

a remote termination adapted to aggregate power provided to and transmitted by two or more non-adjacent pairs of the plurality of conducting pairs and supply the aggregated power to a remote electronic device; and

a plurality of rectifiers configured to receive AC power transmitted over the two or more non-adjacent pairs and rectify the AC power into direct current (DC) power.

2. The system of claim 1 wherein the plurality of conducting pairs comprises twisted pairs of a private branch exchange (PBX).

3. The system of claim 1 wherein the plurality of conducting pairs comprises twisted pairs of the public switched telephone network (PSTN).

4. The system of claim 1, further comprising a plurality of power circuits configured to provide power to the plurality of conducting pairs.

5. The system of claim 4 wherein the power provided by each of the power circuits is alternating current (AC) power.

6. The system of claim 5, further comprising a microcontroller coupled to each of the power circuits, said microcontroller configured to receive a current sense signal from at least one of the power circuits.

7. The system of claim 6 wherein the microcontroller provides a gate control signal to one or more of the power circuits, said gate control signal operable to control the frequency and magnitude of the AC power.

8. The system of claim 1 wherein the outputs of the rectifiers are coupled together such that the two or more rectifiers provide the aggregated power.

9. The system of claim 1, further comprising current limiter coupled to at least one of the two or more rectifiers, the current limiter operable to control the power provided by its associated pair to the aggregated power.

10. The system of claim 1 wherein the remote electronic device comprises an IP telephone.

11. The system of claim 1 wherein the remote electronic device comprises a communication repeater.

12. The system of claim 4 wherein the power provided by each of the power circuits is direct current (DC) power.

13. The system of claim 1 wherein the remote electronic device comprises a wireless access point.

14. The system of claim 1 wherein the remote electronic device comprises a DSL device.

15. A system for providing power to electronic devices, comprising a wiring closet having a plurality of power circuits configured to transmit power over a plurality of conducting pairs, wherein first and second pairs of the plurality of conducting pairs are routed to a first remote location for providing an aggregated power from said first and second pairs to a first remote device having a first rectifier configured to receive the AC power transmitted over the first pair and rectify the received AC power into a first direct current (DC) power and a second rectifier configured to receive the AC power transmitted over the second pair and rectify the received AC power into a second DC power, said first pair being non-adjacent to said second pair at a line termination (LT) end of the system.

16. The system of claim 15 wherein a third pair of the plurality of conducting pairs is routed to a second remote location for providing power to a second remote device, said third pair being adjacent to either the first or second pair at the LT end of the system.

17. The system of claim 15 wherein the first remote device comprises a communication repeater.

18. The system of claim 15 wherein the first remote device comprises an IP telephone.

19. The system of claim 15 wherein the first remote device comprises a wireless access point.

20. The system of claim 15 wherein the first remote device comprises a DSL device.

21. The system of claim 15 wherein the plurality of conducting pairs comprises a plurality of twisted pairs.

22. The system of claim 21 wherein the plurality of twisted pairs comprises twisted pairs of the public switched telephone network (PSTN).

23. The system of claim 15 wherein the power provided by each of the power circuits is alternating current (AC) power.

24. The system of claim 15, further comprising a microcontroller coupled to each of the power circuits, said microcontroller configured to receive a current sense signal from at least one of the power circuits.

25. The system of claim 15 wherein the microcontroller provides a gate control signal to one or more of the power circuits, said gate control signal operable to control the frequency and magnitude of AC power provided by said one or more power circuits.

26. The system of claim 15 wherein outputs of the first and second rectifiers are coupled together to provide the aggregated power.

27. The system of claim 15 wherein the power provided by each of the power circuits is direct current (DC) power.

28. A method of providing power to an electronic device, comprising:

coupling an electronic device to first and second conducting pairs of a plurality of conducting pairs, said first and second conducting pairs being non-adjacent conducting pairs provided by a wiring closet or central office;

applying power to the first and second conducting pairs;

limiting a current drawn through the first and second conducting pairs to a predetermined limited current;

sensing the predetermined limited current drawn by the electronic device;

determining a current demand of the electronic device, based on the predetermined limited current drawn by the electronic device; and

permitting the current demand of the electronic device to increase to a full demand, so long as the current demand does not exceed a maximum current carrying limit of the first and second conducting pairs; and

removing power from the first and second conducting pairs if the current demand of the electronic device exceeds the maximum current carrying limit of the first and second conducting pairs.

29. The method of claim 28 wherein the maximum current carrying limit of the first and second conducting pairs is defined to be a predetermined value.

30. The method of claim 28, further comprising removing the power from the first and second conducting pairs if the current demand of the electronic device would require the system to provide more current than the system is capable of providing.

31. The method of claim 28 wherein the first and second conducting pairs comprise first and second twisted pairs.

32. The method of claim 31 wherein the first and second twisted pairs comprise twisted pairs of the public switched telephone network (PSTN).

33. The method of claim 28 wherein the power is alternating current (AC) power.

34. The method of claim 28, further comprising:

rectifying AC power transmitted over the first conducting pair;

rectifying AC power transmitted over the second conducting pair; and

aggregating the first and second rectified powers; and

supplying the aggregated power to the electronic device.