Telephone communication system and method over local area network wiring

• US 7,480,233 B2
• Filed: 05/10/2005
• Issued: 01/20/2009
• Est. Priority Date: 09/21/2000
• Status: Expired due to Term

• Current Assignee: Taiwan Semiconductor Manufacturing Company Limited
• Original Assignee: SercoNet Limited (Yehuda Binder, MBA)
• Inventors: Binder, Yehuda
• Primary Examiner(s): Qureshi, Afsar M.
• Application Number:
  US11/125,200
• Publication Number:
  US 20050213496A1
• Time in Patent Office: 1,351 Days
• Field of Search: 370200-214, 370/258, 370/274, 370/276, 370/285, 370400-493, 307/3, 307/17, 307/412, 439/490, 439/950, 340/310.11, 340/310.12, 340/693.1, 340/870.39, 375/222, 375/288, 379156-173, 379/90.01, 379/93.08, 379/102.06, 379/110.01
• US Class Current: 370/200
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 2012/6421 Medium of transmission, e.g. fibre, cable, radio, satellite
• CPC Class Codes: H04L 2012/6424 Access arrangements
• CPC Class Codes: H04L 2012/644 Star
• CPC Class Codes: H04L 5/20 using different combinations of lines, e.g. phantom working
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04M 11/066 Telephone sets adapted for data transmision
• CPC Class Codes: Y10S 439/95 Electrical connector adapted to transmit electricity to mating connector without physical contact, e.g. by induction, magnetism, or electrostatic field

Abstract

A method and apparatus for enabling a local area network wiring structure to simultaneously carry digital data and analog telephone signals on the same transmission medium. It is particularly applicable to a network in star topology, in which remote data units (e.g. personal computers) are each connected to a hub through a cable comprising at least two pairs of conductors, providing a data communication path in each direction. Modules at each end of the cable provide a phantom path for telephony (voice band) signals between a telephone near the data set and a PBX, through both conductor pairs in a phantom circuit arrangement. All such communication paths function simultaneously and without mutual interference. The modules comprise simple and inexpensive passive circuit components.

Claims

1. A device for coupling local area network packet-based digital data signals between first and second network cables each having first and second wire pairs, the first and second wire pairs of the first cable also defining a phantom channel for carrying a first signal, the device comprising:

a first signal transformer having a primary winding and a secondary winding, said primary winding having a center-tap connection, said first signal transformer being operative to pass local area network packet-based digital data signals;

a second signal transformer having a primary winding and a secondary winding, said primary winding having a center-tap connection, said second signal transformer being operative to pass local area network packet-based digital data signals;

a first local area network connector having a first contact pair coupled to said primary winding of said first signal transformer, and a second contact pair coupled to said primary winding of said second signal transformer, for connecting said primary windings of said first and second signal transformers to respective ones of the first and second wire pairs of the first local area network cable;

a second standard local area network connector having a first contact pair coupled to said secondary winding of said first signal transformer, and a second contact pair coupled to said secondary winding of said second signal transformer, for connecting said secondary windings of said first and second signal transformers to respective ones of the first and second wire pairs of the second local area network cable;

a third connector having a first contact coupled to said center tap connection of said primary winding of said first signal transformer and a second contact coupled to said center tap connection of said primary winding of said second signal transformer, for connecting said center tap connections to the phantom channel defined by the first and second wire pairs of the first cable; and

a single enclosure housing said first and second signal transformers and said first, second and third connectors.

2. The device according to claim 1, wherein said first and second local area network connectors are RJ-45 type, and the local area network packet-based digital data signals are based on 10/100BaseT per IEEE802.3 standard.

3. The device according to claim 1 having the external dimensions of a standard outlet.

4. The device according to claim 1 configured as a plug-in to a standard outlet.

5. The device according to claim 1 further attachable to a surface of a building.

6. The device according to claim 1 wherein the first signal is an analog signal and the third connector is a standard analog connector.

7. The device according to claim 6 wherein the analog signal is a telephone signal and the analog connector is a standard telephone connector.

8. The device according to claim 1 wherein the first signal is a power signal and the third connector is a power connector.

9. A device for coupling first signals cooperatively forming a single data signal and second and third signals to or from a local area network (LAN) cable carrying the data signals over four wire pairs, the second signal over a first phantom channel and the third signal over a second phantom channel, said device comprising:

a first signal transformer having a primary winding and a secondary winding, the primary winding having a center-tap connection, said first signal transformer being operative to pass local area network packet-based digital data signals;

a second signal transformer having a primary winding and a secondary winding, the primary winding having a center-tap connection, said second signal transformer being operative to pass local area network packet-based digital data signals;

a third signal transformer having a primary winding and a secondary winding, the primary winding having a center-tap connection, said third signal transformer being operative to pass local area network packet-based digital data signals;

a fourth signal transformer having a primary winding and a secondary winding, the primary winding having a center-tap connection, said fourth signal transformer being operative to pass local area network packet-based digital data signals;

a first standard local area network connector having first, second, third and fourth contacts pairs for connecting said first standard local area network connector to respective ones of first, second, third and fourth wire pairs of the LAN cable, each of the wire pairs of the LAN cable carrying a respective local area network packet-based digital data signal, wherein the first and second wire pairs cooperatively form the first phantom channel carrying the second signal, and the third and fourth wire pairs cooperatively form the second phantom channel carrying the third signal;

a LAN connector connected to said secondary windings of said first, second, third and fourth signal transformers, for connecting each of said secondary windings to a respective one of the four wire pairs of the LAN cable for coupling respective local area network packet-based digital data signals between said secondary windings and the wire pairs;

a first port having first and second contacts for coupling to the second signal, said first contact being connected to said center-tap connection of said second signal transformer, and said second contact being connected to said center-tap connection of said third signal transformer, for providing the first phantom channel over the LAN cable for carrying the second signal;

a second port having first and second contacts for coupling to the third signal, said first contact being connected to said center-tap connection of the third signal transformer, the second contact connected to said center-tap connection of said fourth signal transformer, for providing the second phantom channel over the LAN cable for carrying the third signal; and

a single enclosure housing said first, second, third and fourth signal transformers, said LAN connector, said first standard local area network connector and said first and second ports.

10. The device according to claim 9, wherein said LAN connector is an RJ-45 connector, and the LAN cable and the packet-based digital data signals are based on IEEE802.3 Ethernet standard.

11. The device according to claim 9, wherein said LAN connector, the LAN cable and the packet-based digital data signals conform to IEEE802.3 1000BaseT standard.

12. The device according to claim 9, wherein said single enclosure has the dimensions of a standard outlet.

13. The device according to claim 9, wherein said single enclosure is dimensioned as a plug-in to a standard outlet.

14. The device according to claim 9, wherein at least one of the second and third signals comprises a power signal.

15. The device according to claim 9, wherein the second and third signals are signals of the same type.

16. The device according to claim 9, wherein the second and third signals are information signals and said first and second ports are connectors.

17. The device according to claim 16, wherein the second and third signals comprise analog signals.

18. The device according to claim 17, wherein the second and third signals comprise voice signals.

19. The device according to claim 18, wherein the second and third signals comprise mutually independent analog telephone signals and said first and second ports are telephone connectors.

20. The device according to claim 9 in combination with a PBX or an analog telephone set, wherein at least one of the second and third signals is an analog telephone signal, and said device is connected to said PBX or analog telephone set for passing the analog telephone signal.

21. The device according to claim 9 in combination with one of:

an Ethernet hub;

Ethernet switch;

an Ethernet gateway; and

an Ethernet data unit connected to said device for passing the local area network packet-based digital data signals.

22. A Local Area Network (LAN) for carrying a LAN signal simultaneously with a second signal channel and a third signal channel, said network comprising:

a 1000BaseT-based LAN cable comprising a first group and a second group of twisted-wire pairs, each group comprising two twisted-wire pairs, said cable having first and second ends;

first and second RJ-45 connectors each connected to terminate a respective one of said first and second ends of said cable for carrying full-duplex serial digital data according to IEEE802.3 1000BaseT Ethernet standard;

a first system connected to said first RJ-45 connector; and

a second system connected to said second RJ-45 connector, wherein;

said first and second systems communicate over said LAN cable using IEEE802.3 1000BaseT signals;

said first group of twisted-pairs cooperatively form a first phantom channel for carrying the second signal between said first and second systems; and

said second group of twisted-pairs cooperatively form a second phantom channel for carrying the third signal between said first and second systems.

23. The network according to claim 22, wherein said first and second systems and said LAN cable are in a building, said LAN cable is at least in part in a wall of the building, and at least one of said first and second RJ-45 connectors is part of a LAN outlet.

24. The network according to claim 22, wherein at least one of the second and third signals is not a digital data signal.

25. The network according to claim 22, wherein the second and third signals are carried from said first system to said second system.

26. The network according to claim 22, wherein the second and third signals are bi-directional.

27. The network according to claim 22 wherein at least one of the second and third signals comprises a power signal.

28. The network according to claim 22 wherein the second and third signals are signals of the same type.

29. The network according to claim 22 wherein the second and third signals are information signals.

30. The network according to claim 29, wherein the second and third signals comprise analog signals.

31. The network according to claim 30, wherein the second and third signals comprise voice signals.

32. The network according to claim 31, wherein the second and third signals comprise mutually independent analog telephone signals.

33. The network according to claim 22, wherein at least one of the second and third signals is an analog telephone signal, and said first system comprises a PBX or an analog telephone set.

34. The network according to claim 22, wherein at least part of said first system is wall mounted.

35. The network according to claim 34, wherein at least part of said first system is mechanically attachable and electrically connectable to a standard outlet.

36. The network according to claim 22, wherein said first system comprises one of:

an Ethernet hub;

an Ethernet switch;

an Ethernet gateway; and

an Ethernet data unit.

37. The network according to claim 22, further operative to carry a fourth signal, wherein said first and second phantom channels cooperatively form a third phantom channel for carrying the fourth signal between said first and second systems.

38. An arrangement for coupling first signals in the form of data signals and second and third signals to or from a local area network (LAN) cable carrying the data signals over four wire pairs, the second signal over a first phantom channel and the third signal over a second phantom channel, said device comprising:

a first signal transformer having a primary winding and a secondary winding, the primary winding having a center-tap connection, said first signal transformer being operative to pass local area network packet-based digital data signals;

a second signal transformer having a primary winding and a secondary winding, the primary winding having a center-tap connection, said second signal transformer being operative to pass local area network packet-based digital data signals;

a third signal transformer having a primary winding and a secondary winding, the primary winding having a center-tap connection, said third signal transformer being operative to pass local area network packet-based digital data signals;

a fourth signal transformer having a primary winding and a secondary winding, the primary winding having a center-tap connection, said fourth signal transformer being operative to pass local area network packet-based digital data signals;

a first local area network port having first, second, third and fourth contacts pairs for connecting said first local area network port to respective ones of first, second, third and fourth wire pairs of the LAN cable, each of the wire pairs of the LAN cable carrying a respective local area network packet-based digital data signal, wherein the first and second wire pairs cooperatively form the first phantom channel carrying the second signal, and the third and fourth wire pairs cooperatively form the second phantom channel carrying the third signal;

a LAN port connected to said secondary windings of said first, second, third and fourth signal transformers, for connecting each of said secondary windings to a respective one of the four wire pairs of the LAN cable for coupling respective local area network packet-based digital data signals between said secondary windings and the wire pairs;

a first port having first and second contacts for coupling to the second signal, said first contact being connected to said center-tap connection of said second signal transformer, and said second contact being connected to said center-tap connection of said third signal transformer, for providing the first phantom channel over the LAN cable for carrying the second signal;

a second port having first and second contacts for coupling to the third signal, said first contact being connected to said center-tap connection of the third signal transformer, the second contact connected to said center-tap connection of said fourth signal transformer, for providing the second phantom channel over the LAN cable for carrying the third signal; and

a single enclosure housing said first, second, third and fourth signal transformers, said LAN port, said first local area network port and said first and second ports.

39. The arrangement according to claim 38, wherein said LAN port is an RJ-45 connector, and the LAN cable and the packet-based digital data signals are based on IEEE802.3 Ethernet standard.

40. The arrangement according to claim 38, wherein said LAN port, the LAN cable and the packet-based digital data signals conform to IEEE802.3 1000BaseT standard.

41. The arrangement according to claim 38, wherein said single enclosure has the dimensions of a standard outlet.

42. The arrangement according to claim 38, wherein said single enclosure is dimensioned as a plug-in to a standard outlet.

43. The arrangement according to claim 38, wherein at least one of the second and third signals comprises a power signal.

44. The arrangement according to claim 38, wherein the second and third signals are signals of the same type.

45. The arrangement according to claim 38, wherein the second and third signals are information signals and said first and second ports are connectors.

46. The arrangement according to claim 45, wherein the second and third signals comprise analog signals.

47. The arrangement according to claim 46, wherein the second and third signals comprise voice signals.

48. The arrangement according to claim 46, wherein the second and third signals comprise mutually independent analog telephone signals and said first and second ports are telephone connectors.

49. The arrangement according to claim 38 in combination with a PBX or an analog telephone set, wherein at least one of the second and third signals is an analog telephone signal, and said device is connected to said PBX or analog telephone set for passing the analog telephone signal.

50. The device according to claim 38 in combination with one of:

an Ethernet hub;

Ethernet switch;

an Ethernet gateway; and

an Ethernet data unit connected to said device for passing the local area network packet-based digital data signals.

51. A device for coupling digital data and a signal to first and second Local Area Network (LAN) cables, each cable having at least first and second twisted wire pairs connected for carrying full-duplex packet-based digital data over the wire pairs and a signal over a phantom channel formed between the twisted wire pairs, said device comprising:

an Ethernet switch or router having at least first and second ports;

a first digital data connector for connecting to the first LAN cable;

a first signal transformer having a center tap and coupled between said first port and said first digital data connector for passing only digital data signals between said first port and the first twisted wire pair of the first LAN cable;

a second signal transformer having a center tap and coupled between said first port and said first digital data connector for passing only digital data signals between said first port and the second twisted wire pair of the first LAN cable;

a second digital data connector for connecting to the second LAN cable;

a third signal transformer having a center tap and coupled between said second port and said second digital data connector for passing only digital data signals between said second port and the first twisted wire pair of the second LAN cable;

a fourth signal transformer having a center tap and coupled between said second port and said second digital data connector for passing only digital data signals between said second port and the second twisted wire pair of the second LAN cable;

a first connector connected for receiving a first signal; and

a single enclosure housing said Ethernet switch or router, said first and second digital data connectors, said first, second, third and fourth signal transformers, and said first connector,

wherein said first connector is coupled to the center taps of said first and second signal transformers, for coupling the first signal onto a phantom channel over the first cable; and

wherein said first connector is coupled to the center taps of said third and fourth signal transformers, for coupling the first signal onto a phantom channel over the second cable.

52. The device according to claim 51, wherein said first and second digital data connectors are RJ45 type connectors, and wherein the communication over said LAN cables is based on IEEE802.3 10BaseT or 100BaseTX standards.

53. The device according to claim 51, wherein said connectors are connected for providing a DC path for passing DC signals between said first connector and each of said first and second digital data connectors.

54. The device according to claim 51, wherein the first signal is an analog telephone (POTS) signal and said connectors are connected for providing an analog telephone (POTS) path between said first connector and each of said first and second digital data connectors.

55. The device according to claim 54 wherein said first connector is an RJ-11 type connector.

56. The device according to claim 51, in combination with an outlet in which at least a part of said device is housed.

57. The device according to claim 51, wherein said device is pluggable into, or attachable to, an outlet.

58. The device according to claim 51, wherein said single enclosure is wall mountable, or mountable into an outlet opening, or structured to at least in part replace an existing outlet.

59. The device according to claim 51, wherein said single enclosure is constructed to have at least one of the following:

a form substantially similar to that of a standard outlet;

wall mounting elements substantially similar to those of a standard wall outlet;

a shape allowing direct mounting in an outlet opening or cavity; and

a form to at least in part substitute for a standard outlet.