Home personal communication system

• US 5,555,258 A
• Filed: 06/17/1994
• Issued: 09/10/1996
• Est. Priority Date: 06/17/1994
• Status: Expired due to Term

• Current Assignee: Inter-Tel (Delaware) Incorporated (Mitel Networks Corporation)
• Original Assignee: Mcintosh P. Stuckey
• Inventors: Snelling, Richard K., McIntosh, P. Stuckey, Tucker, Mark
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US08/262,214
• Time in Patent Office: 816 Days
• Field of Search: 370/29, 370/95.1, 370/93, 379/57, 379/58, 379/59, 379/63, 379/90, 379/98, 455/33.1, 455/70
• US Class Current: 370/280
• CPC Class Codes: H04M 1/2535 adapted for voice communication over an Internet Protocol [IP] network Voice over Internet Protocol (VoIP) network equipment and services H04M7/006; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04M 1/725 Cordless telephones user interfaces specially adapted therefor H04M1/724
• CPC Class Codes: H04M 1/72505 Radio link set-up procedures
• CPC Class Codes: H04W 84/16 WPBX [Wireless Private Branch Exchange]

Abstract

A wireless telephone subsystem for coupling line type telephony equipment to the public switched telephone network is described. A base unit is provided which is adapted to be coupled to a plurality of lines of the PSTN. The base unit includes a base coder/decoder which transforms analog signals received from the lines of the PSTN to digital signals and conversely transforms digital signals to analog signals for coupling to the lines of the PSTN. The base unit includes a multiple channel transceiver coupled to the base coder/decoder which responds to the digital signals provided by the base coder/decoder for transmitting those signals by placing selected portions of the digital signals into selected portions of a multiplex frame. The base multiple channel transceiver also receives digital signals and couples those digital signals to the base coder/decoder. Programmable switching means is provided to associate selected of the PSTN lines and selected portions of the multiplex frame. The subsystem also includes a wireless interface unit for connecting to the line type telephony equipment. The wireless interface unit also includes a remote coder/decoder for transforming analog signals received from the line type telephony equipment into digital signals and for transforming other digital signals into analog signals for coupling to the line type telephony equipment. The wireless interface also includes a remote transceiver which is coupled to the remote coder/decoder. The remote transceiver responds to digital signals from the remote coder/decoder for transmitting the signals into selected portions of the multiplex frame and receives other digital signals and couples those to the remote coder/decoder.

Claims

1. A wireless telephone subsystem for coupling line type telephony equipment to the Public Switched Telephone Network (PSTN) comprising:

a) a base unit adapted to be coupled to a plurality of lines of the PSTN, said base unit including;

a1) base coder/decoder means for transforming analog signals received from said lines of said PSTN to first digital signals and for transforming other digital signals to analog signals for coupling to said lines of said PSTN,

a2) base multiple channel TDD/TDMA transceiver means coupled to said base coder/decoder means, said base multiple channel TDD/TDMA transceiver means responsive to said first digital signals for transmitting said signals by placing selected portions of said first digital signals into selected portions of a multiplex frame, and for receiving other digital signals and coupling said other digital signals to said base coder/decoder means, and

a3) programmable switching means for associating selected of said PSTN lines and selected portions of said multiplex frame

b) at least one wireless interface unit comprising;

b1) coupling means for connecting to a line type telephony equipment,

b2) remote coder/decoder means for transforming analog signals received from said line type telephony equipment over said coupling means to second digital signals and for transforming other digital signals to analog signals for coupling to said line type telephony equipment through said coupling means, and

b3) remote TDD/TDMA transceiver means coupled to said remote coder/decoder means, said remote TDD/TDMA transceiver means responsive to said second digital signals for transmitting said second digital signals by placing said second digital signals into selected portions of said multiplex frame, and for receiving other digital signals for coupling said other digital signals to said remote coder/decoder means,

whereby said line type telephony equipment is coupled to said PSTN without requiring a conductive path therebetween.

2. A wireless telephone subsystem as recited in claim 1 which further includes:

c) at least one remote handset including;

c1) a microphone and a speaker,

c2) a remote handset coder/decoder means for transforming analog signals received from said microphone to fourth digital signals and for transforming other digital signals to analog signals for coupling to said speaker, and

c3) a handset TDD/TDMA transceiver coupled to said handset coder/decoder means,

whereby said microphone and speaker are coupled to said PSTN without requiring a conductive path therebetween.

3. A subsystem as is recited in claim 1 wherein said wireless interface unit is adapted to be connected to a modem.

4. A telephone subsystem as is recited in claim 1 wherein said wireless interface unit is adapted to be coupled to a facsimile machine.

5. A subsystem as recited in claim 1 which further includes:

a4) a hybrid with two wire and four wire interfaces, said two wire interface coupled to said lines of said PSTN and said tour wire interface coupled to said base coder/decoder means.

6. A subsystem as recited in claim 1 wherein said coupling means of said wireless interface unit includes a hybrid with a two wire interface and a four wire interface, said two wire interface coupled to said line type telephone equipment and said/four wire interface coupled to said remote coder/decoder means.

7. A subsystem as recited in claim 6 which further includes:

a4) a second hybrid with two wire and four wire interfaces, said second hybrid two wire interface coupled to one of said lines of said PSTN and said second hybrid four wire interface coupled to said base coder/decoder means.

8. A subsystem as recited in claim 3 wherein said coupling means provides a bidirectional path between said modem and said wireless interface unit.

9. A subsystem as recited in claim 8 wherein said coupling means includes a hybrid with a two wire interface and a four wire interface, said two wire interface coupled to said modem and said four wire interface coupled to said remote coder/decoder means.

10. A subsystem as recited in claim 8 wherein said coupling means includes

b11) modem modulator/demodulator means with a two wire interface coupled to said modem and a four wire interface,

b21) said remote coder/decoder means comprising forward acting error correcting encoder/decoder means, said four wire interface of said modem modulator/demodulator means coupled to said four wire interface of said forward acting error correcting encoder/decoder means.

11. A subsystem as recited in claim 10 wherein said base coder/decoder means includes:

a11) forward acting error correcting encoder/decoder means coupled to said base multiple channel TDD/TDMA transceiver,

a12) modem modulator/demodulator means with a two wire interface and a four wire interface, said four wire interface of said modem modulator/demodulator means coupled to said forward acting error correcting encoder/decoder means and said two wire interface coupled to line of said PSTN.

12. A subsystem as recited in claim 4 wherein said coupling means provides a bidirectional path between said facsimile machine and said wireless interface unit.

13. A subsystem as recited in claim 12 wherein said coupling means includes a hybrid with a two wire interface and a four wire interface, said two wire interface coupled to said facsimile machine and said four wire interface coupled to said remote coder/decoder means.

14. A subsystem as recited in claim 12 wherein said coupling means includes:

b11) facsimile modulator/demodulator means with a two wire interface coupled to said facsimile machine and a four wire interface,

b21) said remote coder/decoder means comprising forward acting error correcting encoder/decoder means, said four wire interface of said facsimile modulator/demodulator means coupled to said four wire interface of said forward acting error correcting encoder/decoder means.

15. A subsystem as recited in claim 14 wherein said base coder/decoder means includes:

a11) forward acting error correcting encoder/decoder means coupled to said base multiple channel TDD/TDMA transceiver means,

a12) facsimile modulator/demodulator means with a two wire interface and a four wire interface, said four wire interface of said facsimile modulator/demodulator means coupled to said forward acting error correcting encoder/decoder means and said two wire interface coupled to said a line of said PSTN.

16. A subsystem as recited in any of claims 1, 6, 8, 9, 10, 12, 13, or 14 wherein said coupling means includes ring generator means for generating ringing energy.

17. A wireless telephone subsystem for coupling line type telephony equipment to the Public Switched Telephone Network (PSTN) comprising:

a) a base unit adapted to be coupled to a plurality of lines of the PSTN, said base unit including;

a1) base coder/decoder means for transforming analog signals received from said lines of said PSTN to first digital signals and for transforming other digital signals to analog signals for coupling to said lines of said PSTN,

a2) base multiple channel transceiver means coupled to said base coder/decoder means, said base multiple channel transceiver means responsive to said first digital signals for transmitting said signals by placing selected portions of said first digital signals into selected portions of a multiplex frame, and for receiving other digital signals and coupling said other digital signals to said base coder/decoder means, and

a3) programmable switching means for associating selected of said PSTN lines and selected portions of said multiplex frame

b) at least one wireless interface unit comprising;

b1) coupling means for connecting to a line type telephony equipment,

b2) remote coder/decoder means for transforming analog signals received from said line type telephony equipment over said coupling means to second digital signals and for transforming other digital signals to analog signals for coupling to said line type telephony equipment through said coupling means, and

b3) remote transceiver means coupled to said remote coder/decoder means, said remote transceiver responsive to said second digital signals for transmitting said second digital signals by placing said second digital signals into selected portions of said multiplex frame, and for receiving other digital signals for coupling said other digital signals to said remote coder/decoder means,

whereby said line type telephony equipment is coupled to said PSTN without requiring a conductive connection.

18. A wireless telephone subsystem as recited in claim 17 which further includes:

c) at least one remote handset including;

c1) a microphone and a speaker,

c2) a remote handset coder/decoder means for transforming analog signals received from said microphone to fourth digital signals and for transforming other digital signals to analog signals for coupling to said speaker, and

c3) a handset transceiver coupled to said handset coder/decoder means,

whereby said microphone and speaker are coupled to said PSTN without requiring a conductive connection.

19. A subsystem as is recited in claim 17 wherein said wireless interface unit is adapted to be connected to a modem.

20. A telephone subsystem as is recited in claim 17 wherein said wireless interface unit is adapted to be coupled to a facsimile machine.

21. A subsystem as recited in claim 17 which further includes:

a4) a hybrid with two wire and four wire interfaces, said two wire interface coupled to said lines of said PSTN and said four wire interface coupled to said base coder/decoder means.

22. A subsystem as recited in claim 17 wherein said coupling means of said wireless interface unit includes a hybrid with a two wire interface and a four wire interface, said two wire interface coupled to said line type telephone equipment and said four wire interface coupled to said remote coder/decoder means.

23. A subsystem as recited in claim 22 which further includes:

a4) a second hybrid with two wire and four wire interfaces, said second hybrid two wire interface coupled to one of said lines of said PSTN and said second hybrid four wire interface coupled to said base coder/decoder means.

24. A subsystem as recited in claim 19 wherein said coupling means provides a bidirectional path between said modem and said wireless interface unit.

25. A subsystem as recited in claim 24 wherein said coupling means includes a hybrid with a two wire interface and a four wire interface, said two wire interface coupled to said modem and said four wire interface coupled to said remote coder/decoder means.

26. A subsystem as recited in claim 24 wherein said coupling means includes:

b11) modem modulator/demodulator means with a two wire interface coupled to said modem and a four wire interface,

b21) said remote coder/decoder means comprising forward acting error correcting encoder/decoder means, said four wire interface of said modem modulator/demodulator means coupled to said four wire interface of said forward acting error correcting encoder/decoder means.

27. A subsystem as recited in claim 26 wherein said base coder/decoder means includes:

a11) forward acting error correcting encoder/decoder means coupled to said base multiple channel transceiver,

a12) modem modulator/demodulator means with a two wire interface and a four wire interface, said four wire interface of said modem modulator/demodulator means coupled to said forward acting error correcting encoder/decoder means and said two wire interface coupled to line of said PSTN.

28. A subsystem as recited in claim 20 wherein said coupling means provides a bidirectional path between said facsimile machine and said wireless interface unit.

29. A subsystem as recited in claim 28 wherein said coupling means includes a hybrid with a two wire interface and a four wire interface, said two wire interface coupled to said facsimile machine and said four wire interface coupled to said remote coder/decoder means.

30. A subsystem as recited in claim 28 wherein said coupling means includes:

b11) facsimile modulator/demodulator means with a two wire interface coupled to said facsimile machine and a four wire interface,

b21) said remote coder/decoder means comprising forward acting error correcting encoder/decoder means, said four wire interface of said facsimile modulator/demodulator means coupled to said four wire interface of said forward acting error correcting encoder/decoder means.

31. A subsystem as recited in claim 30 wherein said base coder/decoder means includes:

a11) forward acting error correcting encoder/decoder means coupled to said base multiple channel transceiver,

a12) facsimile modulator/demodulator means with a two wire interface and a four wire interface, said four wire interface of said facsimile modulator/demodulator means coupled to said forward acting error correcting encoder/decoder means and said two wire interface coupled to said a line of said PSTN.

32. A subsystem as recited in any of claims 17, 22, 24, 25, 26, 28, 29 or 30 wherein said coupling means includes ring generator means for generating ringing energy.

33. An interface subsystem interfacing line type telephone equipment to the Public Switched Telephone Network (PSTN) via a wireless communication system, said interface subsystem comprising:

a) an interface unit with a two wire side and a four wire side, said two wire side adapted to be coupled to said line type telephone equipment, said interface unit including an energy source for supplying ring energy to said line type telephone equipment,

b) coder/decoder means with two ports for converting digital information presented at a first port into analog form which is output at a second port and for converting analog information presented at said second port into digital information which is output at said first port, said two wire side of said interface coupled to said second port,

c) transceiver means for transmitting digital information presented at an input and for receiving digital information and outputting said received digital information at an output, said input and output of said transceiver means coupled to first port of said coder/decoder means, and

d) microprocessor means coupled to said energy source and responsive to said transceiver means for initiating operation of said energy source to supply ring energy to said line type telephone equipment.

34. The interface subsystem of claim 33 wherein said interface unit includes a two wire to four wire hybrid and said transceiver means comprises TDD/TDMA transceiver means.

35. The interface subsystem of claim 33 wherein said line type telephone equipment comprises a telephone.

36. The interface subsystem of claim 33 wherein said line type telephone equipment comprises a modem.

37. The interface subsystem of claim 33 wherein said line type telephone equipment comprises a facsimile machine.