CA2237145A1 - Narrowband and broadband telecom system - Google Patents

Narrowband and broadband telecom system Download PDF

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Publication number
CA2237145A1
CA2237145A1 CA002237145A CA2237145A CA2237145A1 CA 2237145 A1 CA2237145 A1 CA 2237145A1 CA 002237145 A CA002237145 A CA 002237145A CA 2237145 A CA2237145 A CA 2237145A CA 2237145 A1 CA2237145 A1 CA 2237145A1
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CA
Canada
Prior art keywords
shelf
connection
subscriber
network
telecommunications system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002237145A
Other languages
French (fr)
Inventor
Richard Marion Czerwiec
Joseph E. Sutherland
Peter Mathijs Leonard Schepers
Geert Arthur Edith Van Wonterghem
Marlin V. Simmering
Eduard Christian Maria Boeykens
Chris Van Der Auwera
Peter Alain Richard Van Rompu
Kurt Pynaert
Daniel Alois Cornelius Verly
Gilbert Alfons Francoise Van Campenhout
Richard Haywood Bailey
Robert Nicolas Louis Peschi
Dirk Marcel Juliette Van Aken
Emmanuel Frans Borowski
Peter Paul Frans Reusens
Herman Leo Rosalia Verbueken
Frank Ryckebusch
Koen Ambroise Godelieve De Wulf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
Original Assignee
Alcatel Alsthom Compagnie Generale dElectricite
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25397702&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2237145(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Alcatel Alsthom Compagnie Generale dElectricite filed Critical Alcatel Alsthom Compagnie Generale dElectricite
Priority to CA002444418A priority Critical patent/CA2444418C/en
Priority to CA002444420A priority patent/CA2444420C/en
Priority to CA002444239A priority patent/CA2444239C/en
Priority to CA002444231A priority patent/CA2444231A1/en
Priority to CA002444419A priority patent/CA2444419C/en
Priority to CA002444236A priority patent/CA2444236C/en
Publication of CA2237145A1 publication Critical patent/CA2237145A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0002—Modulated-carrier systems analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04L5/023—Multiplexing of multicarrier modulation signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • H04M3/007—Access interface units for simultaneous transmission of speech and data, e.g. digital subscriber line [DSL] access interface units
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/02—Constructional details
    • H04Q1/028—Subscriber network interface devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/02—Constructional details
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/02—Constructional details
    • H04Q1/10—Exchange station construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0046—User Network Interface
    • H04J2203/0048—Network termination, e.g. NT1, NT2, PBX
    • H—ELECTRICITY
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5603—Access techniques
    • H04L2012/5609—Topology
    • H04L2012/561—Star, e.g. cross-connect, concentrator, subscriber group equipment, remote electronics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5614—User Network Interface
    • H04L2012/5618—Bridges, gateways [GW] or interworking units [IWU]
    • H—ELECTRICITY
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5625—Operations, administration and maintenance [OAM]
    • H—ELECTRICITY
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    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
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    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
    • H04L2012/5652—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly
    • H04L2012/5653—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL]
    • H04L2012/5658—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL] using the AAL5
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2201/00—Constructional details of selecting arrangements
    • H04Q2201/12—Printed circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2201/00—Constructional details of selecting arrangements
    • H04Q2201/80—Constructional details of selecting arrangements in specific systems
    • H04Q2201/802—Constructional details of selecting arrangements in specific systems in data transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13003—Constructional details of switching devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1301—Optical transmission, optical switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13034—A/D conversion, code compression/expansion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13103—Memory
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13199—Modem, modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1329—Asynchronous transfer mode, ATM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13291—Frequency division multiplexing, FDM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13299—Bus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13389—LAN, internet

Abstract

An architecture, as well as various components, of an asynchronous transfer mode (ATM) subscriber access multiplexer (ASAM) system can be implemented using an xDSL (x-Digital Subscriber Line) using DMT (Discrete Multitone) or CAP (Carrierless Amplitude Phase Modulation) between a plurality of subscribers and a corresponding plurality of line termination equipment in a shelf that also includes network termination equipment for connection to an ATM network. The line termination and network termination equipment are interconnected by a bus internal to the shelf for providing subscriber access. Separate lowpass filters are provided at each end of a twisted wire pair between the shelf and each subscriber equipment. A shelf can be used as a hub for connecting to a remote shelf that includes the line termination equipment for connection to subscribers.
Although the internal bus of the shelf is shown in a non-redundant embodiment, an increased level of equipment protection can be provided by placing one half of a redundant equipment pair in one shelf and the other half in the other shelf and sharing network termination equipment between such shelves.

Claims (45)

1. A telecommunications system for providing both narrowband and broadband services to a plurality of subscriber premises, comprising:
at least one shelf for connection to a public switched telephone network (PSTN) and for connection to an asynchronous transfer mode (ATM) network for connecting said PSTN and said ATM network to said plurality of subscriber premises via a corresponding plurality of twisted copper pairs; and a plurality of subscriber modems for connection to said corresponding plurality of twisted copper pairs, wherein each of said twisted copper pairs is for providing an asymmetric digital subscriber line for providing both plain old telephone service (POTS) and digital channels in an ATM format.
2. The telecommunications system of claim 1, wherein said asymmetric digital subscriber line utilizes discrete multitone (DMT) technology.
3. The telecommunications system of claim 1, wherein said shelf comprises:
an ATM network termination (NT) card for providing said connection to said ATM network;
an ATM signal bus connected to said NT card for transporting ATM cells; and a plurality of line termination (LT) cards connected to said ATM signal bus, each LT card for connection to a plurality of said twisted copper pairs.
4. The telecommunications system of claim 3, wherein said shelf further comprises:

a plurality of lowpass filter cards each corresponding to one of said LT cards for said connection to said PSTN and for connection to a corresponding plurality of said twisted copper pairs along with said corresponding one of said LT cards for isolating said PSTN from said digital channels.
5. The telecommunications system of claim 4, wherein each LT card includes a highpass filter for connection to each one of said corresponding twisted copper pairs for isolating said POTS from said LT card.
6. The telecommunications system of claim 5, wherein each subscriber modem includes a highpass filter for connection to said corresponding twisted copper pair for isolating said subscriber modem from said POTS.
7. The telecommunications system of claim 6, further comprising a plurality of subscriber lowpass filters for connection to said corresponding plurality of twisted copper pairs at said plurality of subscriber premises and for connection to a subscriber telephone for isolating said telephone from said digital channels.
8. The telecommunications system of claim 3, further comprising a rack for housing said at least one shelf among a plurality of shelves for connection to said PSTN and for connection to said ATM network, wherein said ATM signal bus is extendable for sharing between said plurality of shelves.
9. The telecommunications system of claim 8, wherein only one shelf in said rack has an ATM NT card and wherein other shelves in said rack without said ATM

NT card have extender cards for connecting said other shelves to said ATM signal bus.
10. The telecommunications system of claim 9, wherein said plurality of subscriber premises is connected to said at least one shelf via a remote shelf, and wherein said at least one shelf is useable as a hub shelf for connecting said ATM network to said remote shelf as well as directly to subscriber premises.
11. The telecommunications system of claim 10, wherein said remote shelf is for connection to said ATM
network via said hub shelf or, alternatively, via a backup hub shelf in said rack.
12. The telecommunications system of claim 8, wherein said plurality of subscriber premises are connected to said at least one shelf via a remote shelf, and wherein said at least one shelf is useable as a hub shelf for connecting said ATM network to said remote shelf as well as directly to subscriber premises.
13. The telecommunications system of claim 12, wherein said remote shelf is for connection to said ATM
network via said hub shelf or, alternatively, via a backup hub shelf in said rack.
14. The telecommunications system of claim 1, wherein said shelf connected to said plurality of subscriber premises is useable in a remote configuration as a remote shelf for connection to said ATM network via a shelf used as a hub shelf, wherein said hub shelf is useable for connecting said ATM network to other remote shelves as well as directly to subscriber premises.
15. A telecommunications system, comprising:
at least one shelf (34) for housing:
a network termination card (12a) for connection to a broadband network, a plurality of line termination cards (14) for connection to said network termination card by means of a backplane bus (78) of said shelf, and a plurality of upstream end lowpass filter cards (24) each for connection to a public switched telephone network, wherein each lowpass filter card is for connection to a corresponding line termination card for joining a plurality of telephony signals and a corresponding plurality of digital subscriber line signals at an upstream end (66) of a corresponding plurality of twisted copper pairs (36); and a plurality of subscriber terminals for location at a corresponding plurality of subscriber premises, each subscriber terminal for connection at a downstream end of a corresponding twisted copper pair for communication with a corresponding upstream end lowpass filter and line termination card over said corresponding twisted copper pair, wherein each subscriber terminal comprises:
a downstream end lowpass filter (42) for connection at said downstream end of said corresponding twisted copper pair and for connection to a telephone (56) at a corresponding subscriber premises (54); and a digital subscriber line modem (72) also for connection at said downstream end (68) of said corresponding twisted copper pair for connection to a data terminal (76) at said corresponding subscriber premises.
16. The telecommunications system of claim 15, wherein said plurality of upstream end lowpass filter cards are for insertion in slots of said at least one shelf, said slots arranged adjacent corresponding line termination card slots of said at least one shelf.
17. The telecommunication system of claim 16, further comprising a splitter shelf separate from said at least one shelf wherein one or more of said plurality of upstream end lowpass filter cards are insertable in slots of said splitter shelf instead of said slots of said at least one shelf.
18. The telecommunications system of claim 15, wherein said digital subscriber line signal is an asymmetrical digital subscriber line signal.
19. The telecommunications system of claim 15, wherein said asymmetrical digital subscriber line signal utilizes discrete multitone (DMT).
20. The telecommunications system of claim 15, wherein said at least one shelf is useable in a remote configuration as a remote shelf for connection to said broadband network via a shelf used as a hub shelf wherein said hub shelf is useable for connecting said broadband network to other remote shelves as well as directly to subscriber premises.
21. The telecommunications system of claim 20, further comprising a rack for housing said hub shelf among a plurality of shelves interconnected via a common data and control bus.
22. The telecommunications system of claim 21, wherein said remote shelf is for connection to said broadband network via said hub shelf or, alternatively, via a backup hub shelf in said rack.
23. A telecommunications system, comprising:
subscriber equipment, comprising:
a downstream end low pass filter (42) for use at a subscriber's premises (54), responsive to a telephony signal (50) occupying a baseband position in a frequency division multiplexed signal (36) also having a wideband signal (58) occupying a position above baseband, for only providing said telephony signal for use in voice communications between said subscriber's premises and a public switched telephone network (PSTN); and a digital subscriber line modem (72) for use at the subscriber's premises, responsive to said frequency division multiplexed signal for providing said wideband signal for use in digital communications between said subscriber's premises and a packet network; and provider equipment comprising:
a shelf (34), responsive to said telephony signal (50) and to said wideband signal (58), for providing said frequency division multiplexed signal (36).
24. The telecommunications system of claim 23, wherein said shelf comprises:
a network termination (NT) card (12a) for connection to said packet network;
a plurality of line termination (LT) cards (14) for connection to said NT card by means of a backplane bus (78) of said shelf; and a plurality of upstream end lowpass filter (LPF) cards (24) each for connection to said PSTN;

wherein each upstream LPF card is for connection to a corresponding LT card for joining a corresponding telephony signal and a corresponding wideband signal at an upstream end of a twisted copper pair (36), wherein said telecommunications system further comprises a plurality of subscriber equipment each comprising a downstream end lowpass filter (42) and a digital subscriber line modem (72), each subscriber equipment for connection to a corresponding upstream end LPF card and LT card at a downstream end of a corresponding twisted copper pair.
25. The telecommunications system of claim 24, wherein said plurality of upstream end LPF cards are for insertion in slots of said at least one shelf, said slots arranged adjacent corresponding LT card slots of said shelf.
26. The telecommunications system of claim 25, further comprising a splitter shelf separate from said shelf (34) wherein one or more of said plurality of upstream end LPF cards are insertable in slots of said splitter shelf instead of said slots of said at least one shelf.
27. The telecommunications system of claim 23, wherein said wideband signal is a digital subscriber line signal.
28. The telecommunications system of claim 27, wherein said digital subscriber line signal is an asymmetrical digital subscriber line signal.
29. The telecommunications system of claim 28, wherein said asymmetrical digital subscriber line signal utilizes discrete multitone (DMT) for modulation.
30. The telecommunications system of claim 23, wherein said shelf is useable in a remote configuration as a remote shelf for connection to said packet network via another shelf used as a hub shelf part of said provider equipment wherein said hub shelf is useable for connecting said packet network to other remote shelves as well as directly to subscriber premises.
31. The telecommunications system of claim 30, wherein said provider equipment further comprises a rack for housing said hub shelf among a plurality of shelves interconnected via a common data and control bus.
32. The telecommunications system of claim 31, wherein said remote shelf is for connection to said packet network via said hub shelf or, alternatively, via a backup shelf of said rack.
33. The telecommunications system of claim 23, further comprising a plurality of racks each for housing at least one shelf for connection to a plurality of corresponding subscriber equipment.
34. The telecommunications system of claim 33, wherein said racks are for installation at different geographic locales.
35. Subscriber equipment for use in a telecommunications system having a shelf for connection both to a telephone network and to a wideband network and having a plurality of subscriber lines for connection to subscriber equipment at a plurality of subscriber premises, each subscriber equipment comprising:
a lowpass filter (42) for use at a subscriber's premises (54), responsive to a telephony signal (50, 52) occupying a baseband position in a frequency division multiplexed signal (36) also having a wideband signal (58, 74) occupying a position above baseband, for only providing said telephony signal between said lowpass filter (42) and a subscriber's telephone (56) for use in voice communications between said subscriber's premises and said telephone network; and a digital subscriber line modem (72) for use at the subscriber's premises, for connection to said frequency division multiplexed signal for only providing said wideband signal between said digital subscriber line modem (72) and a subscriber's data terminal (76) for use in digital communications between said subscriber's premises and said wideband network.
36. The telecommunications system of claim 35, wherein said wideband signal (58) is transported in an asynchronous transfer mode (ATM) format.
37. The telecommunications system of claim 35, wherein said frequency division multiplexed signal (36) is provided on a twisted wire pair connected between said shelf (34) and a downstream end node (68) at a subscriber end, said downstream node (68) for splitting in a downstream direction said frequency division multiplexed signal between said lowpass filter (42) and said digital subscriber line modem (72), wherein said shelf includes an upstream end node (66) for joining in said downstream direction said telephony signal (50) and said wideband signal (58) to form said frequency division multiplexed signal (36).
38. The telecommunications system of claim 35, wherein said downstream end lowpass filter (42) and said digital subscriber line modem (72) are connected to a downstream end node (68) which is in turn connected to an upstream end node (66) at said shelf (34) by a twisted wire pair, wherein said shelf includes a lowpass filter (40) and a highpass filter (38) connected to said upstream end node (66), wherein said highpass filter (38) is connected to said wideband signal (58) and wherein said lowpass filter (40) is connected to said telephony signal (50).
39. The telecommunications system of claim 35, wherein said shelf includes an upstream end lowpass filter (40) and an upstream end highpass filter (38) both connected to said upstream end node (66), wherein said frequency division multiplexed signal (36) includes upstream signals including an upstream telephony signal occupying said baseband position and an upstream wideband signal occupying said position above baseband, and wherein said upstream end lowpass filter (40) is responsive to said upstream signals for only providing said upstream telephony signal upstream and wherein said upstream end highpass filter (38) is responsive to said upstream signals for only providing said upstream wideband signal.
40. A shelf for use among a plurality of shelves in a rack for use in a telecommunications system for providing both narrowband and broadband services to a plurality of subscriber premises, comprising:
a housing for connection to a narrowband network and for connection to a broadband network for connecting said narrowband network and said broadband network to said plurality of subscriber premises via a corresponding plurality of twisted copper pairs, wherein said housing includes plural sections including:
an upper section (22) for housing in a central portion (24) thereof a plurality of lowpass filter cards with connectors thereon for insertion in a backplane of said housing, and wherein said upper portion (22) of said housing also has end portions (33) reserved for connecting said narrowband network and said plurality of twisted copper pairs; and a lower section (20) for housing a plurality of line termination cards in a central portion (14) thereof, each with connectors thereon for insertion in said backplane of said housing, and wherein said lower section (20) includes at least one end portion (35) reserved for at least one network termination card for cable connection to said broadband network.
41. Line termination equipment for use in a shelf of a telecommunications system, said line termination equipment for connection to a plurality of subscriber lines for connection to a corresponding plurality of subscriber equipment at a plurality of subscriber premises, said line termination equipment comprising:
plural subscriber channels, each comprising a hybrid circuit for connection to a corresponding twisted pair from a corresponding subscriber premises, each channel comprising:
a highpass filter for isolating a telephony signal occupying a baseband position in a frequency-division multiplexed signal (36) from a wideband signal occupying a position above baseband;
a modulator/encoder, responsive to said wideband signal for providing an encoded and modulated wideband signal to said hybrid circuit for providing said encoded and modulated wideband signal on said twisted copper pair in said position above baseband; and a demodulator/decoder, responsive to a wideband signal from said subscriber premises for providing a demodulated and decoded wideband signal to said wideband network.
42. A replaceable printed board assembly (PBA) for use in a shelf of a telecommunications system, wherein said shelf is for connection both to a telephone network and to a wideband network and having a plurality of subscriber lines for connection to subscriber equipment at a plurality of subscriber premises, said replaceable PBA comprising:
a corresponding plurality of lowpass filters, each having:
a first port for connection to a plain old telephone service (POTS) interface (50) comprising a plurality of twisted copper pairs; and a second port for connection to a corresponding second plurality of twisted copper pairs for connection to said corresponding plurality of customer premises and to said wideband network via a wideband multiplex bus of said shelf.
43. A telecommunications rack for connection to an upstream network service provider for providing said service to downstream subscriber equipment also for connection to said rack, comprising:
a plurality of shelves, at least one shelf for connection to said upstream network service provider by means of network termination equipment, each shelf for connection to different equipment of said downstream subscriber equipment by means of line termination equipment, wherein each of said plurality of shelves has a same nonredundant feature;
at least one pair of redundant line termination equipment, one line termination equipment of said pair for use in said at least one shelf in association with said same nonredundant feature thereof and a remaining line termination equipment of said pair for use in another shelf of said plurality of shelves in association with said same nonredundant feature thereof; and means for connecting said at least one shelf and said another shelf for providing said same nonredundant feature redundantly.
44. The telecommunications rack of claim 43, wherein said same nonredundant feature is a shelf bus for interconnecting said network termination equipment and said line termination equipment.
45. Network termination equipment for use in a shelf of a telecommunications system, said network termination equipment for connection to an asynchronous transfer mode (ATM) network and to a plurality of line termination equipment also for use in said shelf for connection to subscriber equipment, said network termination equipment comprising:
physical medium termination equipment for interfacing to a physical medium by means of a serial input/output connection to said ATM network for providing a parallel input/output;
transmission conveyance means connected to said parallel input/output for recovering/mapping ATM cells from/to frames of a transport format of said serial input/output;
ATM layer processing means connected to said transmission conveyance means for layer processing downstream ATM cells recovered by said transmission conveyance means and for providing upstream ATM cells to said transmission conveyance means; and an ATM bus interface responsive to downstream ATM cells from said ATM layer processing means for providing said downstream ATM cells with a guard byte for an ATM bus in said shelf and responsive to upstream ATM
cells with a guard byte for providing said upstream cells to said ATM layer processing means without said guard byte.
CA002237145A 1997-07-10 1998-06-10 Narrowband and broadband telecom system Abandoned CA2237145A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA002444418A CA2444418C (en) 1997-07-10 1998-06-10 Telecommunications system and subscriber equipment therefor
CA002444420A CA2444420C (en) 1997-07-10 1998-06-10 Line termination equipment
CA002444239A CA2444239C (en) 1997-07-10 1998-06-10 Housing for connection to both broadband and narrowband networks as a shelf in a telecommunications rack
CA002444231A CA2444231A1 (en) 1997-07-10 1998-06-10 Network termination equipment
CA002444419A CA2444419C (en) 1997-07-10 1998-06-10 Telecommunications rack including shelves with nonredundant backplanes used redundantly
CA002444236A CA2444236C (en) 1997-07-10 1998-06-10 Replacable printed board assembly (pba)

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US08/891,145 1997-07-10
US08/891,145 US6314102B1 (en) 1997-07-10 1997-07-10 Telecommunications system for providing both narrowband and broadband services to subscribers

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CA002444231A Division CA2444231A1 (en) 1997-07-10 1998-06-10 Network termination equipment
CA002444239A Division CA2444239C (en) 1997-07-10 1998-06-10 Housing for connection to both broadband and narrowband networks as a shelf in a telecommunications rack
CA002444420A Division CA2444420C (en) 1997-07-10 1998-06-10 Line termination equipment
CA002444236A Division CA2444236C (en) 1997-07-10 1998-06-10 Replacable printed board assembly (pba)
CA002444418A Division CA2444418C (en) 1997-07-10 1998-06-10 Telecommunications system and subscriber equipment therefor
CA002444419A Division CA2444419C (en) 1997-07-10 1998-06-10 Telecommunications rack including shelves with nonredundant backplanes used redundantly

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EP (5) EP1575256A3 (en)
JP (1) JP3563601B2 (en)
CN (2) CN1211129A (en)
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CA (1) CA2237145A1 (en)
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ES (1) ES2427165T3 (en)
IL (6) IL145169A (en)
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