Simultaneous transmission of an analog pots signal and a digital signal on a subscriber line

• US 7,020,266 B2
• Filed: 10/03/2002
• Issued: 03/28/2006
• Est. Priority Date: 02/28/1997
• Status: Expired due to Term

• Current Assignee: DZS, Inc.
• Original Assignee: Paradyne Corporation (Dasan Networks Incorporated)
• Inventors: Bremer, Gordon, Davis, Jeff
• Primary Examiner(s): Hoosain, Allan
• Application Number:
  US10/269,209
• Publication Number:
  US 20030039348A1
• Time in Patent Office: 1,272 Days
• Field of Search: 379/37, 379/47, 379/49, 379/74, 379/88.13, 379/88.17, 379/92.01, 379/93.03, 379/92.02, 379/93.08, 379/93.09, 379/93.11, 379/219, 379/220.01, 379/221.02, 379/373.01, 379/373.05
• US Class Current: 379/220.01
• CPC Class Codes: H04L 12/2856 Access arrangements, e.g. Internet access asynchronous transfer mode networks H04L12/5601; broadband local area networks H04L12/2801; optical access or distribution networks H04Q11/0067; access to open networks H04L12/5691; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M11/00; home network gateways H04L12/2834; wireless access networks H04W
• CPC Class Codes: H04L 12/2863 Arrangements for combining access network resources elements, e.g. channel bonding modem pooling H04L25/14; routing of packets H04L45/00; multichannel or multilink protocols H04L69/14
• CPC Class Codes: H04L 12/2889 Multiservice, e.g. MSAN
• CPC Class Codes: H04L 12/2898 Subscriber equipments DSL modems H04M11/062; cable modems H04L12/2801
• CPC Class Codes: H04M 11/002 with telemetering systems telemetering in general G08C
• CPC Class Codes: H04M 11/04 with alarm systems, e.g. fire, police or burglar alarm systems
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

Apparatus and method for simultaneously providing multiple telephone-type services to any/all POTS-type devices on a single wire pair at a user premises. The present invention provides for the ability to add separately addressable POTS devices on a single service loop. This can be accomplished in at least two ways: first by the use of a multipoint protocol or second by Frequency Division Multiplexing.

Claims

1. A data communications apparatus for enabling a plurality of telephone-type services to be provided to a plurality of telephone-type devices connected to a single subscriber line, said apparatus comprising:

circuitry connectable to at least one of said plurality of telephone-type devices wherein said circuitry enables said at least one of said plurality of telephone-type devices to operate using a frequency band higher than a plain old telephone system (POTS) frequency band on the subscriber line; and

interface circuitry attachable to said single subscriber line to enable said at least one of said plurality of telephone-type devices using said frequency band higher than said POTS frequency band to simultaneously share said single subscriber line with another one of said plurality of telephone-type devices that uses the POTS frequency band;

wherein said plurality of telephone-type services comprises at least one of a video phone service, a digital phone service with a protocol utilized for communication over the Internet, a digital facsimile service, an audio service utilizing audio compression, a digitized audio service, an audio and visual data streaming service, a multimedia service, a home security service, and a meter reading service, wherein the real-time services are serviced in a timely manner using polling.

2. The data communications apparatus of claim 1, further comprising means for providing said plurality of telephone-type services concurrently.

3. The data communications apparatus of claim 1, wherein the plurality of telephone-type services are provided by a central office, the central office comprising:

a POTS splitter electrically connected to the subscriber line, the POTS splitter transmitting a first signal onto the subscriber line and receiving a second signal from the subscriber line;

a POTS switch connected to the POTS splitter; and

a multipoint master modem connected to the POTS splitter;

wherein one of the first and second signals comprises one of an analog POTS signal and at least one digital signal, the analog POTS signal having a POTS data within the POTS frequency band, the at least one digital signal having digital data within the frequency band higher than the POTS frequency band; and

wherein the other of the first and second signals comprises at least one digital signal within the frequency band higher than the POTS frequency band.

4. The data communications apparatus of claim 1, wherein the plurality of telephone-type services are performed at a customer premises, the customer premises comprising said subscriber line and said plurality of telephone-type devices, the telephone-type devices comprising at least one POTS device that transmits and receives analog POTS signals along the subscriber line, the telephone-type devices further comprising at least one digital device that transmits and receives digital signals along the subscriber line;

wherein the analog POTS signals comprise voice data within a first frequency band ranging from 0 to 4 kHz, and the digital signals comprise digital data within a second frequency band ranging from 20 kHz to 1 MHz, the first and second frequency bands separated by a guard frequency band ranging from 4 kHz to 20 kHz.

5. The data communications apparatus of claim 1, wherein at least one of the plurality of telephone-type devices using the frequency band higher than the POTS frequency band is a digitized analog communications device.

6. The data communications apparatus of claim 1, wherein the plurality of telephone-type services comprises at least one of an audio service utilizing audio compression, a digitized audio service, a DSL service, a multimedia service, a video phone service, a digital telephone service including a protocol for communication over the Internet, a digital facsimile service, an audio and visual data streaming service, a home security service, a utility meter reading service, a digital telephone service, a personal computer service, an Internet video telephone service, and a digital television service.

7. The data communications apparatus of claim 1, wherein at least one of the telephone-type devices using the frequency band higher than the POTS frequency band has a transfer rate that is higher than that associated with at least one of the plurality of telephone-type devices that uses the POTS frequency band.

8. The data communications apparatus of claim 1, wherein at least one of the telephone-type devices that uses the POTS frequency band is designed to communicate a voice signal, and at least one of the telephone-type devices that uses the frequency band higher than the POTS frequency band is designed to communicate a data signal.

9. The data communications apparatus of claim 1, further comprising means for transmitting communication signals along the subscriber line, the communication signals comprising:

an analog POTS signal within the POTS frequency band, the POTS frequency band comprising a range of frequencies for carrying POTS signals; and

at least one digital signal within the frequency band higher than the POTS frequency band, the frequency band higher than the POTS frequency band comprising a range of frequencies for carrying digital signals;

wherein the analog POTS signal and the digital signal exist on the subscriber line simultaneously, the telephone-type devices comprising at least one POTS device that transmits or receives the analog POTS signal and at least one digital device that transmits or receives the digital signal.

10. The data communications apparatus of claim 9, wherein the at least one digital device operates in both the POTS frequency band and the frequency band higher than the POTS frequency band when the at least one POTS device is not in operation.

11. The data communications apparatus of claim 9, wherein the POTS frequency band comprises frequencies within a range from 0 to 4 kHz, the frequency band higher than the POTS frequency band comprises frequencies within a range from 20 kHz to 1 MHz, and a guard frequency band comprises frequencies within a range from 4 kHz to 20 kHz.

12. The data communications apparatus of claim 9, wherein the at least one digital signal comprises a plurality of digital signals, each digital signal transmitted along the subscriber line within a frequency range that is a sub-set of the frequency band higher than the POTS frequency band, each sub-set being separate from the sub-sets of the other digital signals.

13. The data communications apparatus of claim 12, wherein the subscriber line is connected to a plurality of digital devices, each digital device configured to transmit and receive digital signals within the respective frequency band sub-set.

14. The data communications apparatus of claim 9, wherein the analog POTS signal is transmitted along the subscriber line in one direction and the digital signal is simultaneously transmitted along the subscriber line in the opposite direction.

15. The data communications apparatus of claim 1, herein the data communication apparatus is configured within a communication system, the communication system comprising:

a subscriber premises having said subscriber line connected to a plurality of subscriber devices, the subscriber devices comprising at least one POTS device that transmits and receives an analog POTS signal and at least one digital device that transmits and receives a digital signal; and

a central office wire center comprising a POTS splitter, a POTS switch, and a multipoint master modem, the POTS splitter connected to the subscriber line of the subscriber premises and further connected to the POTS switch and multipoint master modem of the central office wire center;

wherein a communication signal is communicated between the POTS splitter and the subscriber devices along the subscriber line, the communication signal comprising the analog POTS signal within a first frequency range and the digital signal within a second frequency range, the second frequency range comprising frequencies higher than the frequencies in the first frequency range.

16. The data communications apparatus of claim 15, wherein the analog POTS signal is communicated between the POTS splitter and POTS switch, and the digital signal is communicated between the POTS splitter and the multipoint master modem.

17. The data communications apparatus of claim 1, wherein the single subscriber line is a single wire pair.

18. The data communications apparatus of claim 1, wherein the plurality of telephone-type devices that uses the POTS frequency band communicates directly with the subscriber line without the use of a modem.

19. The data communications apparatus of claim 1, wherein the plurality of telephone-type devices comprises at least one device from a list comprising telephones and facsimile machines.

20. The data communications apparatus of claim 1, further comprising a modem, wherein the plurality of telephone-type devices using the frequency band higher than the POTS frequency band communicates with the subscriber line via the modem.

21. The data communications apparatus of claim 1, wherein the subscriber line allows simultaneous transmission of analog POTS signals and digital signals.

22. A method for use in a data communications apparatus, said method comprising:

providing a plurality of telephone-type services to a plurality of telephone-type devices connected to a single subscriber line of said data communications apparatus, at least one of said plurality of telephone-type devices operating within a frequency band higher than a plain old telephone system (POTS) frequency band; and

enabling said at least one of said plurality of telephone-type devices to operate within said frequency band higher than said POTS frequency band and to simultaneously share said single subscriber line with another one of said plurality of telephone-type devices that uses the POTS frequency band;

wherein providing a plurality of telephone-type services comprises providing at least one of a video phone service, a digital phone service with a protocol utilized for communication over the Internet, a digital facsimile service, an audio service utilizing audio compression, a digitized audio service, an audio and visual data streaming service, a multimedia service, a home security service, and a meter reading service, wherein the real-time services are serviced in a timely manner using polling.

23. The method of claim 22, wherein providing said plurality of telephone-type services further comprises providing said plurality of telephone-type services concurrently.

24. The method of claim 22, wherein the plurality of telephone-type services are provided by a central office, the central office comprising:

a POTS splitter electrically connected to the subscriber line, the POTS splitter transmitting a first signal onto the subscriber line and receiving a second signal from the subscriber line;

a POTS switch connected to the POTS splitter; and

a multipoint master modem connected to the POTS splitter;

wherein one of the first and second signals comprises one of an analog POTS signal and at least one digital signal, the analog POTS signal having POTS data within the POTS frequency band, the at least one digital signal having digital data within the frequency band higher than the POTS frequency band; and

wherein the other of the first and second signals comprises at least one digital signal within the frequency band higher than the POTS frequency band.

25. The method of claim 22, wherein providing said plurality of telephone-type services further comprises providing the plurality of telephone-type services at a customer premises, the customer premises comprising:

said single subscriber line, the single subscriber line being in electrical communication with a central office of a communication system; and

said plurality of telephone-type devices, the telephone-type devices comprising at least one POTS device that transmits and receives analog POTS signals along the subscriber line, the telephone-type devices further comprising at least one digital device that transmits and receives digital signals along the subscriber line;

wherein the analog POTS signals comprise signals within a first frequency band comprising frequencies within a range from 0 to 4 kHz, and the digital signals comprise digital data within a second frequency band comprising frequencies within a range from 20 kHz to 1 MHz, whereby the first and second frequency bands are separated by a guard frequency band comprising frequencies within a range from 4 kHz to 20 kHz.

26. The method of claim 22, further comprising:

communicating a data signal in the frequency band that is higher than the POTS frequency band; and

communicating a voice signal in the POTS frequency band.

27. The method of claim 22, wherein at least one of the plurality of telephone-type devices using the frequency band higher than the POTS frequency band is a digitized analog communications device.

28. The method of claim 22, wherein providing the plurality of telephone-type services comprises providing at least one of an audio service utilizing audio compression, a digitized audio service, a DSL service, a multimedia service, a video phone service, a digital telephone service including a protocol for communication over the Internet, a digital facsimile service, an audio and visual data streaming service, a home security service, a utility meter reading service, a digital telephone service, a personal computer service, an Internet video telephone service, and a digital television service.

29. The method of claim 22, further comprising:

communicating a voice signal via one of the telephone-type devices that uses the POTS frequency band; and

communicating a data signal via one of the telephone-type devices that uses the frequency band higher than the POTS frequency band.

30. The method of claim 22, further comprising:

simultaneously transmitting multiple communication signals along the subscriber line, the communication signals comprising;

an analog POTS signal within the POTS frequency band; and

at least one digital signal within the frequency band higher than the POTS frequency band.

31. The method of claim 30, wherein the POTS frequency band comprises frequencies within a range from 0 to 4 kHz, the frequency band higher than the POTS frequency band comprises frequencies within a range from 20 kHz to 1 MHz, and a guard frequency band comprises frequencies within a range from 4 kHz to 20 kHz.

32. The method of claim 30, wherein the telephone-type devices comprise at least one POTS device that transmits or receives the analog POTS signal and at least one digital device that transmits or receives the digital signal.

33. The method of claim 32, wherein the at least one digital device operates in both the POTS frequency band and the frequency band higher than the POTS frequency band when the at least one POTS device is not in operation.

34. The method of claim 32, wherein the at least one digital signal comprises a plurality of digital signals, the method further comprising:

transmitting each digital signal along the subscriber line within a frequency range that is a sub-set of the frequency band higher than the POTS frequency band, each sub-set being separate from the sub-sets of the other digital signals.

35. The method of claim 34, further comprising:

enabling each digital device to transmit or receive one of the plurality of digital signals to or from the subscriber line within the respective frequency band sub-set.

36. The method of claim 32, further comprising:

transmitting the analog POTS signal along the subscriber line in one direction; and

simultaneously transmitting the at least one digital signal along the subscriber line in the opposite direction.

37. The method of claim 22, wherein the single subscriber line is a single wire pair.

38. The method of claim 22, further comprising:

enabling the telephone-type device that uses the POTS frequency band to communicate directly with the subscriber line without the use of a modem.

39. The method of claim 38, wherein the telephone-type device comprises one device from a list comprising telephones and facsimile machines.

40. The method of claim 22, further comprising:

enabling the at least one telephone-type device using the frequency band higher than the POTS frequency band to communicate with the subscriber line via a modem.

41. The method of claim 22, further comprising:

enabling at least one of the plurality of telephone-type devices to communicate with the subscriber line via a wireless connection.

42. The method of claim 22, wherein the subscriber line allows simultaneous transmission of analog POTS signals and digital signals.

43. A system comprising:

a subscriber line;

a first telephone-type device designed to communicate within a plain old telephone system (POTS) frequency band, the first telephone-type device connected to the subscriber line;

a second telephone-type device designed to communicate within a frequency band that is higher than the POTS frequency band, the second telephone-type device implementing at least one of an audio service that utilizes audio compression, a DSL service, a multimedia service, a video phone service, a digital phone service including a protocol for communication over the Internet, a digital facsimile service, an audio and visual data streaming service, a home security service, and a meter reading system service including real-time devices that are serviced in a timely manner using polling; and

interface circuitry that interfaces the second telephone type-device to the subscriber line and enables the second telephone-type device to communicate within a frequency band that is higher than the POTS frequency band.

44. The system of claim 43, further comprising means for enabling the first telephone-type device and second telephone-type device to operate concurrently.

45. The system of claim 43, further comprising a central office for providing a plurality of telephone-type services, the central office comprising:

a POTS splitter electrically connected to the subscriber line, the POTS splitter transmitting a first signal onto the subscriber line and receiving a second signal from the subscriber line;

a POTS switch connected to the POTS splitter; and

wherein one of the first and second signals comprises one of an analog POTS signal and at least one digital signal, the analog POTS signal having data within the POTS frequency band, the at least one digital signal having digital data within the frequency band higher than the POTS frequency band; and

wherein the other of the first and second signals comprises at least one digital signal within the frequency band higher than the POTS frequency band.

46. The system of claim 45, further comprising a customer premises, wherein the customer premises comprises:

said subscriber line, the subscriber line being in electrical communication with the central office; and

said first telephone-type device, the first telephone-type device comprising a POTS device that transmits and receives analog POTS signals along the subscriber line; and

said second telephone-type device, the second telephone-type device comprising a digital device that transmits and receives digital signals along the subscriber line;

wherein the POTS frequency band comprises frequencies within a range from 0 to 4 kHz, and the frequency band that is higher than the POTS frequency band comprises frequencies within a range from 20 kHz to 1 MHz, whereby the frequency bands are separated by a guard frequency band comprising frequencies within a range from 4 kHz to 20 kHz.

47. The system of claim 43, further comprising means for providing a first telephone-type service to the first telephone-type device and providing a second telephone-type service to the second telephone-type device, each telephone-type service being determinable by a telephone service provider.

48. The system of claim 43, wherein the second telephone-type device is a digitized analog communications device.

49. The system of claim 43, the second telephone-type device implements one of an audio service utilizing audio compression, a digitized audio service, a DSL service, a multimedia service, a video phone service, a digital telephone service including a protocol for communication over the Internet, a digital facsimile service, an audio and visual data streaming service, a home security service, a utility meter reading service, a digital telephone service, a personal computer service, an Internet video telephone service, and a digital television service.

50. The system of claim 43, wherein the second telephone-type device has a transfer rate that is higher than the transfer rate associated with the first telephone-type device.

51. The system of claim 43, wherein the first telephone-type device is designed to communicate an analog voice signal, and the second telephone-type device is designed to communicate a digital data signal.

52. The system of claim 43, further comprising means for transmitting communication signals along the subscriber line, the communication signals comprising:

an analog POTS signal within the POTS frequency band, the POTS frequency band comprising a range of frequencies for carrying POTS signals; and

at least one digital signal within the frequency band that is higher than the POTS frequency band, the frequency band higher than the POTS frequency band comprising a range of frequencies for carrying digital signals;

wherein the analog POTS signal and the at least one digital signal exist on the subscriber line simultaneously, the telephone-type devices comprising at least one POTS device that transmits or receives the analog POTS signal and at least one digital device that transmits or receives the digital signal.

53. The system of claim 52, wherein the at least one digital device operates in both the POTS frequency band and the frequency band that is higher than the POTS frequency band when the at least one POTS device is not in operation.

54. The system of claim 52, wherein the POTS frequency band comprises frequencies within a range from 0 to 4 kHz, the frequency band higher than the POTS frequency band comprises frequencies within a range from 20 kHz to 1 MHz, and a guard frequency band comprises frequencies within a range from 4 kHz to 20 kHz.

55. The system of claim 52, wherein the at least one digital signal comprises a plurality of digital signals, each digital signal transmitted along the subscriber line within a frequency range that is a sub-set of the frequency band higher than the POTS frequency band, each sub-set being separate from the sub-sets of the other digital signals.

56. The system of claim 55, wherein the subscriber line is connected to a plurality of digital devices, each digital device configured to transmit and receive one of the plurality of digital signals.

57. The system of claim 52, wherein the analog POTS signal is transmitted along the subscriber line in one direction and the digital signal is simultaneously transmitted along the subscriber line in the opposite direction.

58. The system of claim 43, further comprising:

a subscriber premises having said subscriber line connected to a plurality of subscriber devices, the subscriber devices comprising at least one POTS device that transmits or receives analog POTS signals and at least one digital device that transmits or receives digital signals, the at least one digital device comprising at least one real-time device that is serviced in a timely manner; and

a central office wire center comprising a POTS splitter, a POTS switch, and a multi-point master modem, the POTS splitter connected to the subscriber line of the subscriber premises and further connected to the POTS switch and multi-point master modem of the central office wire center;

wherein a communication signal is communicated between the POTS splitter and the subscriber devices along the subscriber line, the communication signal comprising the analog POTS signal within a first frequency range and the digital signal within a second frequency range, the second frequency range comprising frequencies higher than the frequencies in the first frequency range.

59. The system of claim 58, further comprising:

means for communicating the analog POTS signal between the POTS splitter and POTS switch; and

means for communicating the digital signal between the POTS splitter and the multi-point master modem.

60. The system of claim 43, herein the subscriber line is a single wire pair.

61. The system of claim 43, wherein the first telephone-type device communicates directly with the subscriber line without the use of a modem.

62. The system of claim 61, wherein the first telephone-type device comprises at least one device from a list comprising telephones and facsimile machines.

63. The system of claim 43, further comprising a modem, wherein the second telephone-type device communicates with the subscriber line via the modem.