WO2000049796A1 - Digital telephony carrier current system - Google Patents
Digital telephony carrier current system Download PDFInfo
- Publication number
- WO2000049796A1 WO2000049796A1 PCT/US2000/004520 US0004520W WO0049796A1 WO 2000049796 A1 WO2000049796 A1 WO 2000049796A1 US 0004520 W US0004520 W US 0004520W WO 0049796 A1 WO0049796 A1 WO 0049796A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- communication
- signals
- data
- base unit
- distribution system
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5437—Wired telephone
Definitions
- This invention relates to methods and systems for the distribution of digital telephony data streams. More specifically, the invention relates to the distribution of digital telephony signals over AC power lines within a building or facility.
- U.S. Patent No. 4,430,731 describes a subscriber data distribution system having a means for translating data received from a transmission line and transmitting the data to a subscriber terminal via a subscriber drop, as well as a means for translating data received.
- U.S. Patent No. 4,451 ,703 describes a line circuit for connecting a subscriber -line to a telephony system that avoids the use of electro-mechanical elements such as relays.
- U.S. Patent No. 4,550,425 describes a speech sampling and companding device wherein analog speech signals are sampled at a nominal rate of 6 kilohertz and digitized in a Mu-Law encoder.
- U.S. Patent Nos. 4,864,598 and 4,937,851 describe a system for verifying the integrity of each one of a number of communication paths, illustratively telephone subscriber loops that run between a near end location and a corresponding remote far end location.
- U.S. Patent No. 5,052,039 describes a line interface circuit for coupling telecommunications lines and AC current lines.
- U.S. Patent No. 5,333,192 describes a line interface circuit for coupling signals between a telephone line and a hybrid circuit that includes a loop driver circuit for supplying energizing current to the telephone line and for driving the telephone line with alternating current signals.
- U.S. Patent No. 5,465,256 describes a signally pre-processor for receiving signally from a line card of a telephone line.
- U.S. Patent No. 5,528,675 describes a network interface unit for serving a central office line and one or more local stations by interfacing remotely monitored devices, such as utility controllers and meter readers, to an existing customer telephone line that serves the customer site.
- U.S. Patent No. 5,627,898 describes a signal distribution system that includes -a module-receiving means whereby a user may select isolation circuitry to eliminate ground-loop-induced interference.
- U.S. Patent No. 5,694,335 describes an extensible, programmable digital electronic network that originates from a network node and includes a base node microcomputer and a network interface and is operatively connected to a power supply.
- U.S. Patent No. 5,706,157 describes a communication power distribution system that includes a single power distribution system that includes a single power regulator which feeds a plurality of transmission lines current limited by a corresponding active current limiters.
- U.S. Patent Nos. 5,710,798, 5,717,725, and 5,745,532 describe a system and method for wireless transmission of information which is subject to fading by using a RF carrier modulated with a subcarrier modulated with the information.
- U.S. Patent Nos. 5,740,241 and 5,768,368 describe a technique for powering telephone lines using an unbalanced current source and current sink and a technique for improving attenuation/frequency distribution and return loss of transformer coupled wire-line communications circuits.
- U.S. Patent No. 5,778,116 describes an apparatus for distributing and controlling distribution of externally and locally generated communications signals to and between a plurality of subscribers.
- U.S. Patent No. 5,799,067 and 5,799,068 describe a business telephone system
- That employs digital signal processing in a digital telephone having a serial link for connection to a general-purpose computer.
- U.S. Patent No. 5,805,570 describe an end-to-end call processing method for ISDN-BRI central-office switch using a polled multi-tasking.
- a still further object of this invention is to provide a system for the distribution of digital telephony data streams that provides a means for interfacing digital telephony signals to standard digital and analog equipment.
- Another object of this invention is to provide a system for the distribution of digital telephone data streams that provides much improved signal quality.
- a subscriber interface unit is connected to a public network
- a base unit is electrically connected to the subscriber interface unit
- one or more extension units which communicate with the base unit across the AC power lines of a building or facility are employed.
- This invention makes use of the improved signal quality of digital signal communication.
- this invention uses a frequency shift key (FSK) encoding scheme.
- FSK frequency shift key
- Figure 1 is a top level system block diagram showing the major sections of the invention.
- Figure 2 is a block diagram providing additional detail of the subscriber interface unit of the preferred embodiment of the invention.
- FIG. 3 is a block diagram providing additional detail of the base unit of the preferred embodiment of the invention.
- Figure 4 is a block diagram providing additional detail of the extension unit of the preferred embodiment of the invention.
- FIG. 1 shows the top-level system block diagram of the preferred embodiment of the invention.
- Digital telephony signals 101 are received by a subscriber line interface unit 102. These digital telephony signals 101 may be provided by wired, fiber optical, RF or other similar network technologies.
- the subscriber line interface unit 102 receives and converts these signals 101 to make them compatible for the use of the base unit 104 of this invention.
- the subscriber line interface unit 102 is typically connected to the base unit 104 via an electronic signal connection 103.
- the base unit 104 employs an encoding scheme, typically and preferably FSK, and converts and imposes the signal on to the power line 105.
- Also, connected to the power line are one or more extension units 106a-e.
- extension units 106a-e receive the encoded signal from the base unit 104, decode the signal and forward the signal to the user's telecommunication equipment 107 a-e.
- the user's telecommunications equipment 107 a-e may includes such devices as telephones, facsimile machines, modems and the like and are used to perform bi-directional digital and analog communications.
- FIG. 2 shows a block diagram of the subscriber interface unit (SIU) 102 of the preferred embodiment of the invention.
- the preferred SIU is typically mounted on the outside of the building and connects to both the cable television connection and the inside telephone connection box.
- the SIU may be powered 207 either by the cable television network or by a power adapter connected to inside AC power.
- the SIU is compatible with the Universal Serial Bus (PC USB) connection system.
- the preferred SIU is a cable modem dedicated to sending and receiving telephony data over cable.
- a typical and preferred SIU is connected 205 electrically with the cable television system, via cable interface circuitry 201.
- the preferred cable interface circuitry 201 includes both a modulator and a demodulator.
- the cable interface circuitry 201 communicates electronically with a processor 202, which may perform the modulation/demodulation functions as well as frequency allocation, data encryption and decryption, as well as other well understood control and decoding functions.
- the processor 202 transfers information in two ways. First, standard telephone communication signals are communicated to and from a telephone 206 via a standard subscriber line interface circuit (SLIC) 203. Second, digital communication data is communicated via an I/O port 204 to a data link 103 to the base unit 104. The I/O port 204 provides signal isolation as well as level translation.
- SLIC subscriber line interface circuit
- FIG. 3 shows a block diagram of the base unit 104 of the preferred embodiment of the invention.
- the preferred base unit 104 has a plastic enclosure with two electrical connections: a power line connection 307 providing a connection to the AC power line communication channel 105 to the extension units 106; and a data line connection 103 for communicating with the SIU 102.
- a processor 302 is provided, in communication with the data line 103 via an I/O port 301 , which matches the network type on the SIU I O port 204.
- the processor 302 formats the Power Line Communication data and the USB data for communication.
- a modulator 303 receives the signals from the processor 302 transfer to the power line channel 105.
- a buffer 304 receives the signals from the modulator 303.
- a filter 305 receives the buffered signals from the buffer 304 and outputs the data to the power line interface 306 for transfer to the power line interface 307.
- a buffer 309 receives the signal from the filter 310 and outputs the signal to a demodulator 308, which in turn communicates the signal to the processor 302.
- Power 311 is preferably provided to the base unit via the AC power outlet.
- the preferred modulator 303 and demodulator 308 uses a frequency shift key modulation scheme, although alternative modulation schemes can be substituted without departing from the concept of this invention.
- FIG. 4 shows a block diagram of the extension unit 106 of the preferred embodiment of the invention.
- the preferred extension unit 106 is contained in a plastic enclosure and has two or three electrical connections. Typically, one connection is provided to the power line 307 for communication with the base unit 104, via a power line interface circuit 401. The second connection is for connection to a standard telephone 407, via a subscriber line interface circuit (SLIC) 405. A third connection provides a data port 406 such as USB or RS-232. The data port 406 and the SLIC 405 communicate with an extension unit processor 404, which in turn is electrically connected to a modulator 408, for transfer data, and a demodulator 411.
- SLIC subscriber line interface circuit
- the modulator 408 outputs its signal to a buffer 409, which passes the data to a filter 410 prior to transfer to the power line I/F circuit 401.
- the demodulator 41 1 receives its signal from a buffer 403.
- the buffer 403 receives the signal from the power line I/F 401 via a filter 402.
- the preferred modulation scheme used in the extension unit 106 is FSK, although alternative analog transmission techniques could be used without departing from the concept of this invention.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephonic Communication Services (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR0008393-3A BR0008393A (en) | 1999-02-22 | 2000-02-21 | Digital telephony chain transport system |
AU37040/00A AU769110B2 (en) | 1999-02-22 | 2000-02-21 | Digital telephony carrier current system |
EP00915834A EP1159824A1 (en) | 1999-02-22 | 2000-02-21 | Digital telephony carrier current system |
JP2000600421A JP2002537731A (en) | 1999-02-22 | 2000-02-21 | Digital telephony carrier current system |
CA002362960A CA2362960A1 (en) | 1999-02-22 | 2000-02-21 | Digital telephony carrier current system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25605799A | 1999-02-22 | 1999-02-22 | |
US09/256,057 | 1999-02-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000049796A1 true WO2000049796A1 (en) | 2000-08-24 |
Family
ID=22970945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/004520 WO2000049796A1 (en) | 1999-02-22 | 2000-02-21 | Digital telephony carrier current system |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1159824A1 (en) |
JP (1) | JP2002537731A (en) |
AU (1) | AU769110B2 (en) |
BR (1) | BR0008393A (en) |
CA (1) | CA2362960A1 (en) |
WO (1) | WO2000049796A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002344365A (en) * | 2001-05-22 | 2002-11-29 | Matsushita Electric Ind Co Ltd | Power-line carrier communication control system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8668344B2 (en) | 2011-11-30 | 2014-03-11 | Izi Medical Products | Marker sphere including edged opening to aid in molding |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5319634A (en) * | 1991-10-07 | 1994-06-07 | Phoenix Corporation | Multiple access telephone extension systems and methods |
US5530737A (en) * | 1993-03-22 | 1996-06-25 | Phonex Corporation | Secure access telephone extension system and method |
US5911119A (en) * | 1993-03-22 | 1999-06-08 | Phonex Corporation | Secure cordless telephone extension system and method |
US5926755A (en) * | 1996-08-07 | 1999-07-20 | Telefonaktiebolaget Lm Ericsson | Method and an arrangement for conducting multiple calls simultaneously |
-
2000
- 2000-02-21 EP EP00915834A patent/EP1159824A1/en not_active Withdrawn
- 2000-02-21 AU AU37040/00A patent/AU769110B2/en not_active Ceased
- 2000-02-21 WO PCT/US2000/004520 patent/WO2000049796A1/en not_active Application Discontinuation
- 2000-02-21 BR BR0008393-3A patent/BR0008393A/en not_active IP Right Cessation
- 2000-02-21 JP JP2000600421A patent/JP2002537731A/en active Pending
- 2000-02-21 CA CA002362960A patent/CA2362960A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5319634A (en) * | 1991-10-07 | 1994-06-07 | Phoenix Corporation | Multiple access telephone extension systems and methods |
US5530737A (en) * | 1993-03-22 | 1996-06-25 | Phonex Corporation | Secure access telephone extension system and method |
US5911119A (en) * | 1993-03-22 | 1999-06-08 | Phonex Corporation | Secure cordless telephone extension system and method |
US5926755A (en) * | 1996-08-07 | 1999-07-20 | Telefonaktiebolaget Lm Ericsson | Method and an arrangement for conducting multiple calls simultaneously |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002344365A (en) * | 2001-05-22 | 2002-11-29 | Matsushita Electric Ind Co Ltd | Power-line carrier communication control system |
JP4724951B2 (en) * | 2001-05-22 | 2011-07-13 | パナソニック株式会社 | Control device, control method, and power line communication control system |
Also Published As
Publication number | Publication date |
---|---|
AU3704000A (en) | 2000-09-04 |
AU769110B2 (en) | 2004-01-15 |
CA2362960A1 (en) | 2000-08-24 |
BR0008393A (en) | 2002-09-24 |
EP1159824A1 (en) | 2001-12-05 |
JP2002537731A (en) | 2002-11-05 |
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