CA2301546C - Apparatus and method for concurrent voice and data transmission - Google Patents
Apparatus and method for concurrent voice and data transmission Download PDFInfo
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- CA2301546C CA2301546C CA002301546A CA2301546A CA2301546C CA 2301546 C CA2301546 C CA 2301546C CA 002301546 A CA002301546 A CA 002301546A CA 2301546 A CA2301546 A CA 2301546A CA 2301546 C CA2301546 C CA 2301546C
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- Prior art keywords
- xdsl
- pots
- communication
- transceiver
- telephone
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/02—Channels characterised by the type of signal
- H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
Abstract
Communication apparatus comprising a first xDSL transceiver for conveying an xDSL transmission, a splitter (50) for conveying a POTS transmission via a POTS telephone line and the xDSL transmission via an xDSL telephone line, and a second xDSL transceiver being in communication with the first xDSL transceiver and the splitter (50).
Description
WO 99111016 PCTlIL98/00405 APPARATUS AND METHOD FOR CONCURRENT VOICE AND DATA
TRANSMISSION
FIELD OF THE INVENTION
The present invention relates to telecom-munication systems in general, and in particular to methods and apparatus for concurrent voice and data telecommunication over a single medium.
BACKGROUND OF THE INVENTION
Plain old telephone service (POTS), the standard telephone service that most homes that are connected to a public switched telephone network (PSTN) use, is not generally used for concurrent transmission of voice and data, as it is currently limited to transmis-sion rates of up to 56.6 kbit/s.
Technologies such as digital subscriber line (xDSL) services are being developed to allow data, voice, and video to be transmitted simultaneously over standard twisted-pair copper wire telephone lines at multimegabit rates. xDSL is seen as an alternative to the more costly and time-consuming installation of high-speed fiber-based broadband communications networks.
Competing xDSL technologies include ADSL, RADSL, HDSL, SDSL, and VDSL. Each is best suited to a different application, with trade-offs made between signal distance and speed and with each having different transmission bandwidth configurations.
Asymmetric digital subscriber line (ADSL) is perhaps the best known xDSL variant, providing more transmission bandwidth "downstream" to a telephone sub-scriber than "upstream" from the subscriber. Downstream transmission rates range between 1.5 Mbit/s to a theoret-ical 8 Mbit/s, while upstream transmission rates range between 16 kbit/s to a theoretical 1 Mbit/s or more, each depending on line quality, distance, and wire gauge.
Depending on environmental conditions, ADSL can transmit data at a rate of 1.544 Mbit/s over distances of up to 6,000 m using standard 24-gauge wire, and 8 Mbit/s over distances of 4,000 m or less. ADSL works by sending digital pulses in the high-frequency area of telephone wires. Since these high frequencies are not used by normal voice communications, ADSL can operate concurrent-ly with voice communication over the same telephone wires.
Very-high-bit-rate digital subscriber line (VDSL) is the fastest xDSL technology. It can deliver downstream transmissions at a rate of 13 to 52 Mbit/s and upstream transmissions at a rate of 1.5 to 2.3 Mbit/s over a single wire pair. Unfortunately, VDSL has a maximum operating distance of only 300 - 1,500 m.
In digital subscriber line access multi-plexing (DSLAM) telephone carriers join and split voice and data transmissions, employing digital subscriber line access multiplexers to send and receive these transmis-sions to/from subscribers over standard telephone lines using ADSL modems. Line or POTS splatters at the carrier alternately divide upstream ADSL transmissions, directing voice communications onto the public switched network and data streams to service providers such as Internet Serv-ice Providers (ISPs), and join voice and data streams for downstream transmission. A POTS sputter at the sub-scriber's location similarly joins and splits ADSL trans-missions, with voice transmissions terminating at a telephone or other POTS apparatus and data transmissions terminating at an ADSL modem DSLAM is disadvantageous in that it is relatively expensive, generally requires professional installation of the POTS splatter at the subscriber's location and rewiring of the subscriber's telephone outlets to accommodate simultaneous data and voice transmissions, and is largely incompatible with future VDSL and "Fiber to the Curb" (FTTC) systems now being planned.
SUN~IARY OF THE INVENTION
The present invention seeks to provide novel apparatus and methods for providing xDSL service to subscribers. The present invention provides an improved system which overcomes disadvantages of the prior art as discussed above. A communications system is provided wherein voice and data transmissions are joined remotely from a telephone carrier at a substation situated near one or more subscribers. A modified xDSL carrier accom-modates data transmissions for one or more subscribers while simultaneously powering the substation, all over standard telephone wires. The substation then multiplex-es the xDSL transmissions and transmits them to the subscribers.
Embodiments of the present invention are advantageous over the prior art in some or all of the following respects:
a) one xDSL line connecting the telephone carrier and the substation may be used to accommodate high-speed trans-missions for multiple subscribers;
b)rewiring a subscriber's home telephone network is not required;
c) a very simple low pass filter may be used to connect a telephone or other POTS apparatus to the incoming xDSL
transmission at the telephone jack and does not require professional installation;
d) digital pair gain devices, digital loop carriers, and WO 99111016 PCTIiL98100405 remote switching units may be used in parallel to xDSL
transmission;
e) the overall distance over copper wire is increased by approximately 1 Km;
f) a greater number of subscribers may be accommodated using the same rack space as in the prior art;
g) the power consumption per subscriber is reduced; and h) the substation does not require a local power source as it receives power from the central office via standard telephone wires.
There is thus provided in accordance with a preferred embodiment of the present invention communi-cation apparatus including a first xDSL transceiver far conveying an xDSL transmission, a splitter for conveying a POTS transmission via a POTS telephone line and the xDSL transmission via an xDSL telephone line, and a second xDSL transceiver being in communication with the first xDSL transceiver and the splitter.
Further in accordance with a preferred embodiment of the present invention the first xDSL trans-ceiver includes a plurality of first xDSL transceivers and the communication apparatus further includes inverse multiplexing apparatus in communication with any of the plurality of first xDSL transceivers.
Still further in accordance with a pre-ferred embodiment of the present invention remote power-ing apparatus is included for receiving power over a standard telephone line.
Moreover in accordance with a preferred embodiment of the present invention the standard tele-phone line is operative to convey the xDSL transmission.
Additionally in accordance with a pre-ferred embodiment of the present invention the splatter includes a plurality of splatters and the communication apparatus further including POTS multiplexing apparatus in communication with the plurality of splatters.
Further in accordance with a preferred embodiment of the present invention the POTS multiplexing apparatus receives a combined POTS transmission of a plurality of POTS transmissions and multiplexingly commu-nicates the plurality of POTS transmissions via the plurality of splatters.
Still further in accordance with a pre-ferred embodiment of the present invention the POTS
multiplexing apparatus includes digital pair gain appara-tus.
Additionally in accordance with a pre-ferred embodiment of the present invention the POTS
multiplexing apparatus includes digital loop carrier apparatus.
Moreover in accordance with a preferred embodiment of the present invention the POTS multiplexing apparatus includes remote switching unit apparatus.
There is additionally provided in accord-ance with a preferred embodiment of the present invention a communication system including a remote xDSL transceiv-er, a PSTN switch, and a substation in communication with the remote xDSL transceiver via at least one xDSL tele-phone line and the PSTN switch via at least one POTS
telephone line, the substation including a first xDSL
transceiver for communicating in at least one direction an xDSL transmission via the at least one xDSL telephone line, a second xDSL transceiver for communicating in at least one direction the xDSL transmission with the first xDSL transceiver, and a splatter for communicating in at least one direction a POTS transmission via the at least one POTS telephone line and the xDSL transmission with the second xDSL transceiver.
TRANSMISSION
FIELD OF THE INVENTION
The present invention relates to telecom-munication systems in general, and in particular to methods and apparatus for concurrent voice and data telecommunication over a single medium.
BACKGROUND OF THE INVENTION
Plain old telephone service (POTS), the standard telephone service that most homes that are connected to a public switched telephone network (PSTN) use, is not generally used for concurrent transmission of voice and data, as it is currently limited to transmis-sion rates of up to 56.6 kbit/s.
Technologies such as digital subscriber line (xDSL) services are being developed to allow data, voice, and video to be transmitted simultaneously over standard twisted-pair copper wire telephone lines at multimegabit rates. xDSL is seen as an alternative to the more costly and time-consuming installation of high-speed fiber-based broadband communications networks.
Competing xDSL technologies include ADSL, RADSL, HDSL, SDSL, and VDSL. Each is best suited to a different application, with trade-offs made between signal distance and speed and with each having different transmission bandwidth configurations.
Asymmetric digital subscriber line (ADSL) is perhaps the best known xDSL variant, providing more transmission bandwidth "downstream" to a telephone sub-scriber than "upstream" from the subscriber. Downstream transmission rates range between 1.5 Mbit/s to a theoret-ical 8 Mbit/s, while upstream transmission rates range between 16 kbit/s to a theoretical 1 Mbit/s or more, each depending on line quality, distance, and wire gauge.
Depending on environmental conditions, ADSL can transmit data at a rate of 1.544 Mbit/s over distances of up to 6,000 m using standard 24-gauge wire, and 8 Mbit/s over distances of 4,000 m or less. ADSL works by sending digital pulses in the high-frequency area of telephone wires. Since these high frequencies are not used by normal voice communications, ADSL can operate concurrent-ly with voice communication over the same telephone wires.
Very-high-bit-rate digital subscriber line (VDSL) is the fastest xDSL technology. It can deliver downstream transmissions at a rate of 13 to 52 Mbit/s and upstream transmissions at a rate of 1.5 to 2.3 Mbit/s over a single wire pair. Unfortunately, VDSL has a maximum operating distance of only 300 - 1,500 m.
In digital subscriber line access multi-plexing (DSLAM) telephone carriers join and split voice and data transmissions, employing digital subscriber line access multiplexers to send and receive these transmis-sions to/from subscribers over standard telephone lines using ADSL modems. Line or POTS splatters at the carrier alternately divide upstream ADSL transmissions, directing voice communications onto the public switched network and data streams to service providers such as Internet Serv-ice Providers (ISPs), and join voice and data streams for downstream transmission. A POTS sputter at the sub-scriber's location similarly joins and splits ADSL trans-missions, with voice transmissions terminating at a telephone or other POTS apparatus and data transmissions terminating at an ADSL modem DSLAM is disadvantageous in that it is relatively expensive, generally requires professional installation of the POTS splatter at the subscriber's location and rewiring of the subscriber's telephone outlets to accommodate simultaneous data and voice transmissions, and is largely incompatible with future VDSL and "Fiber to the Curb" (FTTC) systems now being planned.
SUN~IARY OF THE INVENTION
The present invention seeks to provide novel apparatus and methods for providing xDSL service to subscribers. The present invention provides an improved system which overcomes disadvantages of the prior art as discussed above. A communications system is provided wherein voice and data transmissions are joined remotely from a telephone carrier at a substation situated near one or more subscribers. A modified xDSL carrier accom-modates data transmissions for one or more subscribers while simultaneously powering the substation, all over standard telephone wires. The substation then multiplex-es the xDSL transmissions and transmits them to the subscribers.
Embodiments of the present invention are advantageous over the prior art in some or all of the following respects:
a) one xDSL line connecting the telephone carrier and the substation may be used to accommodate high-speed trans-missions for multiple subscribers;
b)rewiring a subscriber's home telephone network is not required;
c) a very simple low pass filter may be used to connect a telephone or other POTS apparatus to the incoming xDSL
transmission at the telephone jack and does not require professional installation;
d) digital pair gain devices, digital loop carriers, and WO 99111016 PCTIiL98100405 remote switching units may be used in parallel to xDSL
transmission;
e) the overall distance over copper wire is increased by approximately 1 Km;
f) a greater number of subscribers may be accommodated using the same rack space as in the prior art;
g) the power consumption per subscriber is reduced; and h) the substation does not require a local power source as it receives power from the central office via standard telephone wires.
There is thus provided in accordance with a preferred embodiment of the present invention communi-cation apparatus including a first xDSL transceiver far conveying an xDSL transmission, a splitter for conveying a POTS transmission via a POTS telephone line and the xDSL transmission via an xDSL telephone line, and a second xDSL transceiver being in communication with the first xDSL transceiver and the splitter.
Further in accordance with a preferred embodiment of the present invention the first xDSL trans-ceiver includes a plurality of first xDSL transceivers and the communication apparatus further includes inverse multiplexing apparatus in communication with any of the plurality of first xDSL transceivers.
Still further in accordance with a pre-ferred embodiment of the present invention remote power-ing apparatus is included for receiving power over a standard telephone line.
Moreover in accordance with a preferred embodiment of the present invention the standard tele-phone line is operative to convey the xDSL transmission.
Additionally in accordance with a pre-ferred embodiment of the present invention the splatter includes a plurality of splatters and the communication apparatus further including POTS multiplexing apparatus in communication with the plurality of splatters.
Further in accordance with a preferred embodiment of the present invention the POTS multiplexing apparatus receives a combined POTS transmission of a plurality of POTS transmissions and multiplexingly commu-nicates the plurality of POTS transmissions via the plurality of splatters.
Still further in accordance with a pre-ferred embodiment of the present invention the POTS
multiplexing apparatus includes digital pair gain appara-tus.
Additionally in accordance with a pre-ferred embodiment of the present invention the POTS
multiplexing apparatus includes digital loop carrier apparatus.
Moreover in accordance with a preferred embodiment of the present invention the POTS multiplexing apparatus includes remote switching unit apparatus.
There is additionally provided in accord-ance with a preferred embodiment of the present invention a communication system including a remote xDSL transceiv-er, a PSTN switch, and a substation in communication with the remote xDSL transceiver via at least one xDSL tele-phone line and the PSTN switch via at least one POTS
telephone line, the substation including a first xDSL
transceiver for communicating in at least one direction an xDSL transmission via the at least one xDSL telephone line, a second xDSL transceiver for communicating in at least one direction the xDSL transmission with the first xDSL transceiver, and a splatter for communicating in at least one direction a POTS transmission via the at least one POTS telephone line and the xDSL transmission with the second xDSL transceiver.
Further in accordance with a preferred embodiment of the present invention at least one sub-scriber telephone line is included.
Still further in accordance with a pre-ferred embodiment of the present invention the splatter communicates in at least one direction via the at least one subscriber telephone line.
Additionally in accordance with a pre-ferred embodiment of the present invention the at least one subscriber telephone line includes a plurality of subscriber telephone lines and the substation multiplex-ingly communicates via the plurality of subscriber tele-phone lines.
Moreover in accordance with a preferred embodiment of the present invention a low pass filter is included for communication with the substation via the subscriber telephone line.
Further in accordance with a preferred embodiment of the present invention POTS apparatus is included for communication via the low pass filter.
Still further in accordance with a pre-ferred embodiment of the present invention the communica-tion between the remote xDSL transceiver and the substa-tion uses ADSL protocol.
Additionally in accordance with a pre-ferred embodiment of the present invention any of the transmissions via the subscriber telephone line uses either of ADSL protocol and VDSL protocol.
Moreover in accordance with a preferred embodiment of the present invention any of the telephone lines are twisted pair telephone lines.
There is additionally provided in accord-ance with a preferred embodiment of the present invention a communication method including transmitting at least one xDSL transmission to a remote substation via at least one xDSL telephone line, transmitting at least one POTS
Still further in accordance with a pre-ferred embodiment of the present invention the splatter communicates in at least one direction via the at least one subscriber telephone line.
Additionally in accordance with a pre-ferred embodiment of the present invention the at least one subscriber telephone line includes a plurality of subscriber telephone lines and the substation multiplex-ingly communicates via the plurality of subscriber tele-phone lines.
Moreover in accordance with a preferred embodiment of the present invention a low pass filter is included for communication with the substation via the subscriber telephone line.
Further in accordance with a preferred embodiment of the present invention POTS apparatus is included for communication via the low pass filter.
Still further in accordance with a pre-ferred embodiment of the present invention the communica-tion between the remote xDSL transceiver and the substa-tion uses ADSL protocol.
Additionally in accordance with a pre-ferred embodiment of the present invention any of the transmissions via the subscriber telephone line uses either of ADSL protocol and VDSL protocol.
Moreover in accordance with a preferred embodiment of the present invention any of the telephone lines are twisted pair telephone lines.
There is additionally provided in accord-ance with a preferred embodiment of the present invention a communication method including transmitting at least one xDSL transmission to a remote substation via at least one xDSL telephone line, transmitting at least one POTS
transmission to the remote substation via at least one POTS telephone line, and combining the at least one xDSL
transmission and the at least one POTS transmission at the remote substation using at least one splitter.
There is additionally provided in accord-ance with a preferred embodiment of the present invention a communication method including transmitting a plurality of xDSL transmissions bound for a plurality of subscrib-ers to a remote substation via at least one xDSL tele-phone line, transmitting a plurality of POTS transmis-sions bound for the plurality of subscribers to the remote substation via at least one POTS telephone line, combining any of the plurality of xDSL transmissions and any of the plurality of POTS transmissions at the remote substation to form a combined transmission using at least one splitter, and multiplexingly communicating the com-bined transmission to any of the plurality of subscrib-ers.
There is additionally provided in accord-ance with a preferred embodiment of the present invention communications apparatus including:
at least one xDSL transceiver located external-ly of a subscriber's premises;
a standard telephone line connecting the at least one xDSL transceiver directly to a subscriber's premises telephone network;
at least one xDSL transceiver located at a subscriber's premises, coupled to the subscriber's prem-ises telephone network; and at least one telephone located at a subscrib-er's premises, coupled to the subscriber's premises telephone network.
Preferably, the subscriber's premises telephone network consists of a subscriber's existing home telephone network and does not require rewiring thereof.
transmission and the at least one POTS transmission at the remote substation using at least one splitter.
There is additionally provided in accord-ance with a preferred embodiment of the present invention a communication method including transmitting a plurality of xDSL transmissions bound for a plurality of subscrib-ers to a remote substation via at least one xDSL tele-phone line, transmitting a plurality of POTS transmis-sions bound for the plurality of subscribers to the remote substation via at least one POTS telephone line, combining any of the plurality of xDSL transmissions and any of the plurality of POTS transmissions at the remote substation to form a combined transmission using at least one splitter, and multiplexingly communicating the com-bined transmission to any of the plurality of subscrib-ers.
There is additionally provided in accord-ance with a preferred embodiment of the present invention communications apparatus including:
at least one xDSL transceiver located external-ly of a subscriber's premises;
a standard telephone line connecting the at least one xDSL transceiver directly to a subscriber's premises telephone network;
at least one xDSL transceiver located at a subscriber's premises, coupled to the subscriber's prem-ises telephone network; and at least one telephone located at a subscrib-er's premises, coupled to the subscriber's premises telephone network.
Preferably, the subscriber's premises telephone network consists of a subscriber's existing home telephone network and does not require rewiring thereof.
In accordance with a preferred embodiment of the present invention the apparatus also includes a low pass filter connecting a telephone at a telephone jack to the xDSL transceiver via the standard telephone line and the subscriber's premises telephone network.
There is additionally provided in accord-ance with a preferred embodiment of the present invention a method of providing xDSL communications for a subscrib-er's premises including:
providing at least one xDSL transceiver exter-nally of a subscriber's premises;
connecting via a standard telephone line the at least one xDSL transceiver directly to a subscriber's premises telephone network;
coupling at least one xDSL transceiver located at a subscriber's premises to the subscriber's premises telephone network; and coupling at least one telephone located at a subscriber's premises to the subscriber's premises tele-phone network.
In accordance with a preferred embodiment of the present invention provision of xDSL communication to the subscriber's premises telephone network does not require rewiring thereof.
Preferably, the method also includes connecting at a telephone jack a low pass filter between a telephone and the subscriber's premises telephone network.
It is noted that throughout the specifi-cation and claims the term "POTS apparatus" includes telephones, modems, and other apparatus connectable to a PSTN for low-frequency voice and/or data communication therethrough.
It is further noted that throughout the specification and claims the terms "telephone line,"
"telephone cable," and "telephone wire" are used inter-WO 99/11016 PCflIL98100405 changeably and refer to the physical medium for conveying voice, data, and video transmissions common to POTS
service, typically comprising one or two pairs of twisted wires.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be understood and appreciated from the following detailed description, taken in conjunction with the drawings in which:
Fig. 1 is a simplified block diagram of a communication system constructed and operative in accord-ance with a preferred embodiment of the present inven-tion; and Fig. 2 is a simplified block diagram of apparatus used in the communication system of Fig. 1 constructed and operative in accordance with a preferred embodiment of the present invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Reference is now made to Fig. 1 which is a simplified block diagram of a communications system constructed and operative in accordance with a preferred embodiment of the present invention. Shown is a service provider 10, typically a telephone company, being prefer-ably configured with one or more PSTN switches 12 for providing POTS service to one or more subscribers 14.
Service provider 10 is also preferably configured with one or more transceivers 16, typically ATU-C units or other known xDSL modems, for providing high-speed trans-missions to subscribers 14. A substation 18 is located near subscribers ~14, typically within 500 to 1000 meters of each subscriber 14. Substation 18 is in communication with transceiver I6, typically over one or more standard telephone lines 20, referred to herein as xDSL lines 20.
WO 99/11016 PCTlIL98/00405 It is a particular feature of the present invention that xDSL line 20 is used for high-speed transmissions between substation 18 and transceiver 16, such as ADSL transmis-sions, and that xDSL line 20 may additionally or alterna-tively be used to provide power to substation I8. Power-ing is preferably provided over xDSL line 20 by using the low frequency bandwidth of xDSL line 20 for power instead of POTS transmissions. Substation 18 is also typically in communication with PSTN switch 12 for POTS transmis-sions over one or more standard telephone lines 22, referred to herein as POTS lines 22. Substation 18 is also in communication with subscribers 14, typically over one or more standard telephone lines 24. Subscriber 14 typically has one or more transceivers 26, each typically being an xDSL modem capable of accommodating ADSL or VDSL
transmissions, connecting telephone line 24 with devices such as a computer 28. Subscriber 14 also typically has one or more low pass filters 30, each connecting tele-phone line 24 with POTS apparatus such as a telephone 32 and filtering out high-frequency transmissions from low-frequency POTS transmissions. It is appreciated that low pass filter 30 need not be required should the unfiltered quality of the POTS transmission either to or from POTS
apparatus not warrant filtering.
Typical operation of the communications system of Fig. 1 is described as follows. One or more high-speed transmissions bound for one or more subscrib-ers 14 are transmitted by transceiver 16 over xDSL line to substation 18 together with power for substation 18. The high-speed transmissions are typically sent using an ADSL modem (not shown). One or more POTS trans-missions are also transmitted by PSTN switch 12 over POTS
lines 22 to substation 18. Substation 18 then joins incoming high-speed transmissions with POTS transmissions and multiplexes each transmission over telephone lines 24 to the appropriate subscriber 14 for which the transmis-sion is destined. Transmissions over telephone lines 24 are typically sent using a VDSL modem (not shown), al-though any xDSL protocol appropriate to the distance between substation 18 and subscribers 14, including ADSL, may be used. Subscriber 14 receives the high-speed transmission from telephone line 24 at transceiver 26 where it may be directed to computer 28. Subscriber 14 receives the POTS transmission from telephone line 24 where any high-frequency transmissions are filtered out at low pass filter 30. Any low-frequency POTS transmis-sions may then be directed to telephone 32. Transmis-sions originating from subscriber 14 are received at substation 18 and split into high-speed transmissions for routing over xDSL line 20 and POTS transmissions for routing over POTS line 22.
It is appreciated that inverse multiplex-ing may be employed where multiple xDSL lines 20 are used for high-speed transmissions between transceiver 16 and substation 18.
The configuration of the communications system of Fig. 1 may additionally provide for POTS multi-plexing devices 36 such as digital pair gain devices, digital loop carriers, and remote switching units for joining and splitting multiple POTS lines at service provider 10 and substation 18 for transmission over a single communications medium 38. Communications medium 38 may be a standard POTS telephone line, HDSL, fiber optic, or other medium as appropriate for use with de-vices 36 as is known in the art.
Reference is additionally made to Fig. 2 which is a simplified block diagram of substation 18 of Fig. 1 constructed and operative in accordance with a preferred embodiment of the present invention. Shown is an xDSL modem 40, typically an ADSL modem, for communi-cating xDSL transmissions via xDSL line 20. One or more additional xDSL modems 42 may be provided to accommodate WO 99/11016 PCT/iL98/00405 additional xDSL lines which may optionally be combined using inverse multiplexer 44 as is known. A power supply 46 is optionally provided where powering is received via xDSL line 20 as described hereinabove. One or more xDSL
modems 48, typically VDSL modems, are provided for commu-nicating xDSL transmissions to subscribers via telephone lines 24, typically through one or more provided splat-ters 50. POTS multiplexing devices 36 are also shown splitting a combined POTS transmission received via communications medium 38 into multiple POTS transmissions 54. A logic and processing unit 52 is provided for controlling one or more of the components described hereinabove as is known in the art.
It is appreciated that any of the compo-nents of the present invention may be implemented in computer or other electronic, mechanical, or other elec-tromechanical hardware, software, or any suitable combi-nation using conventional techniques.
It is appreciated that various features of the invention which are, for clarity, described in the contexts of separate embodiments may also be provided in combination in a single embodiment. Conversely, various features of the invention which are, for brevity, de-scribed in the context of a single embodiment may also be provided separately or in any suitable subcombination.
It will be appreciated by persons skilled in the art that the present invention is not limited to what has been particularly shown and described hereina-bove. Rather, the scope of the present invention is defined only by the claims that follow:
There is additionally provided in accord-ance with a preferred embodiment of the present invention a method of providing xDSL communications for a subscrib-er's premises including:
providing at least one xDSL transceiver exter-nally of a subscriber's premises;
connecting via a standard telephone line the at least one xDSL transceiver directly to a subscriber's premises telephone network;
coupling at least one xDSL transceiver located at a subscriber's premises to the subscriber's premises telephone network; and coupling at least one telephone located at a subscriber's premises to the subscriber's premises tele-phone network.
In accordance with a preferred embodiment of the present invention provision of xDSL communication to the subscriber's premises telephone network does not require rewiring thereof.
Preferably, the method also includes connecting at a telephone jack a low pass filter between a telephone and the subscriber's premises telephone network.
It is noted that throughout the specifi-cation and claims the term "POTS apparatus" includes telephones, modems, and other apparatus connectable to a PSTN for low-frequency voice and/or data communication therethrough.
It is further noted that throughout the specification and claims the terms "telephone line,"
"telephone cable," and "telephone wire" are used inter-WO 99/11016 PCflIL98100405 changeably and refer to the physical medium for conveying voice, data, and video transmissions common to POTS
service, typically comprising one or two pairs of twisted wires.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be understood and appreciated from the following detailed description, taken in conjunction with the drawings in which:
Fig. 1 is a simplified block diagram of a communication system constructed and operative in accord-ance with a preferred embodiment of the present inven-tion; and Fig. 2 is a simplified block diagram of apparatus used in the communication system of Fig. 1 constructed and operative in accordance with a preferred embodiment of the present invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Reference is now made to Fig. 1 which is a simplified block diagram of a communications system constructed and operative in accordance with a preferred embodiment of the present invention. Shown is a service provider 10, typically a telephone company, being prefer-ably configured with one or more PSTN switches 12 for providing POTS service to one or more subscribers 14.
Service provider 10 is also preferably configured with one or more transceivers 16, typically ATU-C units or other known xDSL modems, for providing high-speed trans-missions to subscribers 14. A substation 18 is located near subscribers ~14, typically within 500 to 1000 meters of each subscriber 14. Substation 18 is in communication with transceiver I6, typically over one or more standard telephone lines 20, referred to herein as xDSL lines 20.
WO 99/11016 PCTlIL98/00405 It is a particular feature of the present invention that xDSL line 20 is used for high-speed transmissions between substation 18 and transceiver 16, such as ADSL transmis-sions, and that xDSL line 20 may additionally or alterna-tively be used to provide power to substation I8. Power-ing is preferably provided over xDSL line 20 by using the low frequency bandwidth of xDSL line 20 for power instead of POTS transmissions. Substation 18 is also typically in communication with PSTN switch 12 for POTS transmis-sions over one or more standard telephone lines 22, referred to herein as POTS lines 22. Substation 18 is also in communication with subscribers 14, typically over one or more standard telephone lines 24. Subscriber 14 typically has one or more transceivers 26, each typically being an xDSL modem capable of accommodating ADSL or VDSL
transmissions, connecting telephone line 24 with devices such as a computer 28. Subscriber 14 also typically has one or more low pass filters 30, each connecting tele-phone line 24 with POTS apparatus such as a telephone 32 and filtering out high-frequency transmissions from low-frequency POTS transmissions. It is appreciated that low pass filter 30 need not be required should the unfiltered quality of the POTS transmission either to or from POTS
apparatus not warrant filtering.
Typical operation of the communications system of Fig. 1 is described as follows. One or more high-speed transmissions bound for one or more subscrib-ers 14 are transmitted by transceiver 16 over xDSL line to substation 18 together with power for substation 18. The high-speed transmissions are typically sent using an ADSL modem (not shown). One or more POTS trans-missions are also transmitted by PSTN switch 12 over POTS
lines 22 to substation 18. Substation 18 then joins incoming high-speed transmissions with POTS transmissions and multiplexes each transmission over telephone lines 24 to the appropriate subscriber 14 for which the transmis-sion is destined. Transmissions over telephone lines 24 are typically sent using a VDSL modem (not shown), al-though any xDSL protocol appropriate to the distance between substation 18 and subscribers 14, including ADSL, may be used. Subscriber 14 receives the high-speed transmission from telephone line 24 at transceiver 26 where it may be directed to computer 28. Subscriber 14 receives the POTS transmission from telephone line 24 where any high-frequency transmissions are filtered out at low pass filter 30. Any low-frequency POTS transmis-sions may then be directed to telephone 32. Transmis-sions originating from subscriber 14 are received at substation 18 and split into high-speed transmissions for routing over xDSL line 20 and POTS transmissions for routing over POTS line 22.
It is appreciated that inverse multiplex-ing may be employed where multiple xDSL lines 20 are used for high-speed transmissions between transceiver 16 and substation 18.
The configuration of the communications system of Fig. 1 may additionally provide for POTS multi-plexing devices 36 such as digital pair gain devices, digital loop carriers, and remote switching units for joining and splitting multiple POTS lines at service provider 10 and substation 18 for transmission over a single communications medium 38. Communications medium 38 may be a standard POTS telephone line, HDSL, fiber optic, or other medium as appropriate for use with de-vices 36 as is known in the art.
Reference is additionally made to Fig. 2 which is a simplified block diagram of substation 18 of Fig. 1 constructed and operative in accordance with a preferred embodiment of the present invention. Shown is an xDSL modem 40, typically an ADSL modem, for communi-cating xDSL transmissions via xDSL line 20. One or more additional xDSL modems 42 may be provided to accommodate WO 99/11016 PCT/iL98/00405 additional xDSL lines which may optionally be combined using inverse multiplexer 44 as is known. A power supply 46 is optionally provided where powering is received via xDSL line 20 as described hereinabove. One or more xDSL
modems 48, typically VDSL modems, are provided for commu-nicating xDSL transmissions to subscribers via telephone lines 24, typically through one or more provided splat-ters 50. POTS multiplexing devices 36 are also shown splitting a combined POTS transmission received via communications medium 38 into multiple POTS transmissions 54. A logic and processing unit 52 is provided for controlling one or more of the components described hereinabove as is known in the art.
It is appreciated that any of the compo-nents of the present invention may be implemented in computer or other electronic, mechanical, or other elec-tromechanical hardware, software, or any suitable combi-nation using conventional techniques.
It is appreciated that various features of the invention which are, for clarity, described in the contexts of separate embodiments may also be provided in combination in a single embodiment. Conversely, various features of the invention which are, for brevity, de-scribed in the context of a single embodiment may also be provided separately or in any suitable subcombination.
It will be appreciated by persons skilled in the art that the present invention is not limited to what has been particularly shown and described hereina-bove. Rather, the scope of the present invention is defined only by the claims that follow:
Claims (17)
1. Communication apparatus comprising:
a first generic digital subscriber line (xDSL) transceiver for conveying an xDSL
transmission;
a splitter for conveying a plain old telephone service (POTS) transmission via a POTS telephone line and said xDSL transmission via an xDSL telephone line; and a second xDSL transceiver being in communication with said first xDSL
transceiver and said splitter, and wherein said first xDSL transceiver comprises a plurality of first xDSL transceivers; and wherein said communication apparatus further comprises:
inverse multiplexing apparatus in communication with any of said plurality of first xDSL transceivers.
a first generic digital subscriber line (xDSL) transceiver for conveying an xDSL
transmission;
a splitter for conveying a plain old telephone service (POTS) transmission via a POTS telephone line and said xDSL transmission via an xDSL telephone line; and a second xDSL transceiver being in communication with said first xDSL
transceiver and said splitter, and wherein said first xDSL transceiver comprises a plurality of first xDSL transceivers; and wherein said communication apparatus further comprises:
inverse multiplexing apparatus in communication with any of said plurality of first xDSL transceivers.
2. Communication apparatus according to claim 1 and further comprising remote powering apparatus for receiving power over a standard telephone line.
3. Communication apparatus according to claim 2 wherein said standard telephone line is operative to convey said xDSL transmission.
4. Communication apparatus comprising:
a first generic digital subscriber line (xDSL) transceiver for conveying an xDSL
transmission;
a splitter for conveying a plain old telephone service (POTS) transmission via a POTS telephone line and said xDSL transmission via an xDSL telephone line; and a second xDSL transceiver being in communication with said first xDSL
transceiver and said splitter wherein said splitter comprises a plurality of splitters and wherein said communication apparatus further comprises POTS multiplexing apparatus in communication with said plurality of splitters.
a first generic digital subscriber line (xDSL) transceiver for conveying an xDSL
transmission;
a splitter for conveying a plain old telephone service (POTS) transmission via a POTS telephone line and said xDSL transmission via an xDSL telephone line; and a second xDSL transceiver being in communication with said first xDSL
transceiver and said splitter wherein said splitter comprises a plurality of splitters and wherein said communication apparatus further comprises POTS multiplexing apparatus in communication with said plurality of splitters.
5. Communication apparatus according to claim 4 wherein said POTS multiplexing apparatus receives a combined POTS transmission of a plurality of POTS
transmissions and multiplexingly communicates said plurality of POTS transmissions via said plurality of splitters.
transmissions and multiplexingly communicates said plurality of POTS transmissions via said plurality of splitters.
6. Communication apparatus according to claim 4 wherein said POTS multiplexing apparatus comprises digital pair gain apparatus.
7. Communication apparatus according to claim 4 wherein said POTS multiplexing apparatus comprises digital loop carrier apparatus.
8. Communication apparatus according to claim 4 wherein said POTS multiplexing apparatus comprises remote switching unit apparatus.
9. A communication system comprising:
a remote generic digital subscriber line (xDSL) transceiver;
a public switched telephone network (PSTN) switch; and a substation in communication with said remote xDSL transceiver via at least one xDSL telephone line and said PSTN switch via at least one plain old telephone service (POTS) telephone line, wherein said substation comprises:
a first xDSL transceiver for communicating in at least one direction an xDSL transmission via said at least one xDSL telephone line;
a second xDSL transceiver for communicating in at least one direction said xDSL transmission with said first xDSL transceiver; and a splitter for communicating in at least one direction a POTS transmission via said at least one POTS telephone line and said xDSL transmission with said second xDSL transceiver.
a remote generic digital subscriber line (xDSL) transceiver;
a public switched telephone network (PSTN) switch; and a substation in communication with said remote xDSL transceiver via at least one xDSL telephone line and said PSTN switch via at least one plain old telephone service (POTS) telephone line, wherein said substation comprises:
a first xDSL transceiver for communicating in at least one direction an xDSL transmission via said at least one xDSL telephone line;
a second xDSL transceiver for communicating in at least one direction said xDSL transmission with said first xDSL transceiver; and a splitter for communicating in at least one direction a POTS transmission via said at least one POTS telephone line and said xDSL transmission with said second xDSL transceiver.
10. A communication system according to claim 9 and further comprising at least one subscriber telephone line.
11. A communication system according to claim 10 wherein said splitter communicates in at least one direction via said at least one subscriber telephone line.
12. A communication system according to claim 10 wherein said at least one subscriber telephone line comprises a plurality of subscriber telephone lines and wherein said substation multiplexingly communicates via said plurality of subscriber telephone lines.
13. A communication system according to claim 10 and further comprising a low pass filter for communication with said substation via said subscriber telephone line.
14. A communication system according to claim 13 and further comprising POTS
apparatus for communication via said low pass filter.
apparatus for communication via said low pass filter.
15. A communications communications to claim 9 wherein communication between said remote xDSL transceiver and said substation uses asymmetric digital subscriber line (ADSL) protocol.
16. A communications system according to claim 10 wherein any of said transmissions via said subscriber telephone line uses either of ADSL protocol and very-high-data-rate digital subscriber line (VDSL) protocol.
17. A communications system according to claim 1 wherein any of said telephone lines are twisted pair telephone lines.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL12164397A IL121643A (en) | 1997-08-27 | 1997-08-27 | Apparatus and method for concurrent voice and data transmission |
| IL121643 | 1997-08-27 | ||
| PCT/IL1998/000405 WO1999011016A1 (en) | 1997-08-27 | 1998-08-24 | Apparatus and method for concurrent voice and data transmission |
Publications (2)
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| CA2301546A1 CA2301546A1 (en) | 1999-03-04 |
| CA2301546C true CA2301546C (en) | 2003-07-01 |
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ID=11070566
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| CA002301546A Expired - Fee Related CA2301546C (en) | 1997-08-27 | 1998-08-24 | Apparatus and method for concurrent voice and data transmission |
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| EP (1) | EP1033006A4 (en) |
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| PL (1) | PL338880A1 (en) |
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