WO2002037818A1 - Systeme et procede procurant un acces de communication de donnees bande large et un acces de telecommunication bande etroite par rtpc/rnis - Google Patents

Systeme et procede procurant un acces de communication de donnees bande large et un acces de telecommunication bande etroite par rtpc/rnis Download PDF

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Publication number
WO2002037818A1
WO2002037818A1 PCT/SE2001/002369 SE0102369W WO0237818A1 WO 2002037818 A1 WO2002037818 A1 WO 2002037818A1 SE 0102369 W SE0102369 W SE 0102369W WO 0237818 A1 WO0237818 A1 WO 0237818A1
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WO
WIPO (PCT)
Prior art keywords
narrowband
broadband
access means
network
access
Prior art date
Application number
PCT/SE2001/002369
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English (en)
Inventor
Peter Larsen
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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
Priority claimed from EP00123686A external-priority patent/EP1202544A1/fr
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to AU2002211175A priority Critical patent/AU2002211175A1/en
Publication of WO2002037818A1 publication Critical patent/WO2002037818A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Definitions

  • the invention present invention relates to the provision of broadband communication services access and particularly it relates to providing a user or a customer at a customer premises with access to broadband services as well as to narrowband
  • POTS Plain Old Telephony
  • ADSL Asymmetrical Digital Subscriber Line
  • ADSL uses a (twisted) wire pair with analog to digital conversion at the subscriber end.
  • the ADSL technology is e.g. described in the ADSL standard ANSI (American National Standards Institute) T1.413 issue 2 and ITU-T (International Telecommunications Union) G.992 which herewith are incorporated herein by reference, and it uses ADSL interface units at a central office and ADSL interfaces at the subscriber's premises.
  • ADSL to provide users with access to broadband data communication has so far not been implemented to a high extent.
  • One of the main reasons therefore is that the overall costs tend to get high. Generally it is not the costs for the required equipment that prevents a broad implementation but the installation costs which indeed tend to get very high.
  • ADSL can be used for broadband access to the customer premises over the same copper pair wire as is used for the POTS telephony services. Broadband services and POTS services can then be offered at the same time and POTS 5 uses the VF (Voice Frequency) baseband whereas ADSL uses higher frequencies.
  • VF Voice Frequency
  • the customer premises i.e. a user location which may be a flat in a multitenant building or a private house or anything alike, the high frequency band and the VF band must be separated before distributed to a broadband NT (Network
  • FIG. 1A illustrates a customer premises 10A before installation of ADSL.
  • a cable comprising a twisted pair from a central office 100A is used for connection purposes and 11A, 12A, 13A,14A,15A illustrate telephony jacks.
  • L5 Telephony Service (POTS) devices or fixed stations 12A ⁇ , 14A ⁇ are connected to telephony jacks 12A, 14A.
  • POTS Packet Transfer Protocol
  • Fig. IB illustrates the same customer premises after installation of ADSL.
  • a splitter filter 20A is introduced to separate the high frequency band and the VF band before distribution to a broadband NT 26A and the (old) POTS distribution network comprising telephony jacks 12A, 13A, 14A, 15A as above.
  • a number of broadband jacks 23A,24A,25A may be lb provided to enable a flexible placement of the broadband network termination NT 26A.
  • the Customer Premises Equipment CPE 27A is connected to NT 26A over e.g an Ethernet or an USB (Universal Serial Bus) cable. This is a straightforward installation of ADSL and the NT is placed somewhere between the splitter filter
  • a radio LAN Local Area Network
  • the cabling may be done with serially placed jacks or the jacks may be arranged in a star configuration, or a mix of serial and star distribution configuration may be used.
  • the jacks may e.g. be with or without a "security switch" functionality, as for example is used in Sweden, e.g. when a POTS device connected to the first jack is off hook, all other devices connected to other jacks are disconnected, irrespectively of whether they are on or off hook.
  • a LP (Low Pass) filter blocks the ADSL high frequencies in order to prevent them from reaching the POTS telephones connected to the jacks. Then a cable is installed between the HP (High Pass) output of the splitter filter and the location where an interface for broadband access is desired. Somewhere between the HP output of the splitter filter and the broadband CPE an ADSL NT (Network Termination) is inserted on the cable. The NT terminates the ADSL signals and it is able to offer specific user interfaces, e.g. Ethernet and USB for the CPE. Usually it is desirable to locate the NT close to the equipment that will use the broadband service.
  • a radio LAN can be utilized as discussed above.
  • Alternative a new cabling can be built to a number of ADSL jacks as shown in Fig IB.
  • the radio LAN enables a flexible location both for the narrowband services and for the broadband services.
  • the very complicated installation of a splitter involving the problems referred to above is required. What is discussed above considerably contributes to a complicated installation and high installation costs for ADSL at a customer premises .
  • a system etc. is also needed allowing a flexible provision of broadband data communication services access to a subscriber or a customer premises.
  • a system, and an arrangement etc. is also needed through which broadband services access mobility can be provided.
  • a system and a method respectively is needed through which particularly the installation of broadband data communications access (and narrowband access) can be done by the subscriber or customer himself.
  • a system, an arrangement and a method respectively is needed through which ADSL technology easily and cost effectively can be installed at a subscriber premises.
  • a system etc. is needed through which the installation costs at the customer premises using ADSL can be considerably reduced and facilitated as compared to for hitherto known systems.
  • POTS distribution network for narrowband
  • a system, an arrangement and a method is also needed through which the mobility for broadband applications within the premises can be provided for. Moreover a system, an arrangement and a method respectively is also needed for which particularly the installation of a splitter filter is considerably facilitated bearing in mind the initially discussed problems related to the localisation of the first telephony jack on the cable entering the customer premises, or, eventually a branching point before any first telephony jack, when there already is a POTS distribution network provided at the customer premises.
  • the present invention provides for a system for
  • a cable e.g. a twisted pair cable or any other appropriate cable as referred to above, from a public communications network and of a distribution network
  • a splitter filter is provided for separating higher frequency signals for broadband communication from lower frequency signals for narrowband (POTS) telecommunication.
  • POTS narrowband
  • .5 invention used as a distribution network for both higher frequency signals and lower frequency signals and any, an optional or an arbitrary, telephony jack can be used for connection of the splitter filter.
  • Broadband access means are connected to a high frequency port of the splitter filter
  • narrowband access means are connected to a low frequency port of the splitter filter.
  • Each of the access means comprises a number of user interfaces, e.g. one or more. Particularly, if a narrowband or POTS distribution network already is provided at the customer premises, it is used for both higher and lower
  • '5 frequency signals i.e. also for broadband communication.
  • the broadband access means particularly comprises an ADSL network termination which particularly may comprise an ADSL modem and a number of user interfaces for communication with a number of user stations, e.g. Customer Premises Equipment (CPE) such as for example one or more PCs.
  • the user interfaces for broadband access may comprise one or more of an USB-interface, an ATM (Asynchronous Transfer Mode) -interface and an Ethernet interface. Of course also other interfaces may be used.
  • the narrowband access means comprises means for access to a separate local network.
  • a wireless separate local network may with advantage be used and the narrowband access means will then comprise a base station.
  • the narrowband access means comprises a DECT (Digital European Cordless Telephone) base station.
  • DECT Digital European Cordless Telephone
  • the narrowband access means also comprises a POTS interface comprising a pair cable on which one or more telephony jacks can be provided.
  • the separate network can also be in the form of any radio, IR or copper distribution network but the DECT system is advantageous in that it is standardised and a well established product which has a good performance. It is also easy to install and flexible.
  • the customer premises may be connected to a PSTN over the (pair) cable but it may also be connected to an ISDN network over the (pair) cable.
  • the narrowband access means comprises an ISDN network termination with converting means for frequency modulation to a narrowband/POTS interface for connection to a separate local network, e.g. a wireless local network.
  • the broadband and the narrowband access means are integrated in a common entity or unit.
  • the splitter filter and the broadband access means e.g. an ADSL network termination, are integrated in a common entity.
  • the splitter filter and the narrowband access means may be integrated in a common entity.
  • the narrowband access means and the broadband access means are all integrated in a common entity. It is of course also possible to have a separate splitter filter, separate broadband and narrowband access means.
  • the splitter filter or an entity comprising splitter filter and narrowband access means and/or broadband access means is detachbly connected to any existing telephony jack which then will not only function as a telephony jack but for distribution of broadband as well as narrowband signals.
  • the most integrated form comprises a box including the splitter filter, narrowband access means, e.g. a DECT base station, and an ADSL network termination with user interfaces.
  • the network termination should also offer a POTS interface to support telefax, answering machines and the so called "life line" service. The life line service would of course also in this case work without power supply.
  • a standard DECT base station connected to a POTS interface of a combined splitter filter/ADSL network termination or any other alternative as referred to above. It is also possible to use a standard splitter filter, a standard DECT BS and a standard ADSL NT and to connect DECT BS and ADSL NT to the LP and HP ports respectively of the splitter filter. According to the invention it is easy to move the splitter filter (with or without integrated broadband access means and/or narrowband access means) to another location within the
  • the invention also provides for an arrangement for providing broadband data communication access in addition to narrow band telecommunications access at a customer premises.
  • the arrangement comprises a splitter filter and broadband access means comprising an ADSL network termination.
  • the arrangement further comprises narrowband access means for interfacing a separate
  • the splitter filter is connected to an arbitrary, optional, jack of the existing distribution network.
  • the narrowband access means comprises a base station of a wireless local network.
  • the base station may even more particularly comprise a DECT base station.
  • !5 filter may, or may not, be combined or integrated with a narrowband access means and/or broadband access means with user interfaces. Particularly an already existing distribution network, which was used for POTS access only, is used.
  • the invention also provides for a method of providing broadband access to a customer premises fulfilling one or more of the objects initially referred to.
  • the method includes the steps of; providing a distribution network, unless there already is an existing (narrowband) distribution network, at the customer premises; selecting a jack on the (existing) distribution network; connecting a splitter filter or a splitter filter and broadband access means or splitter filter and narrowband access means or splitter filter and broadband access means and 5 narrowband access means to the selected jack; connecting Customer Premises Equipment (CPE) to broadband user interface (s) of the broadband access means; providing a separate distribution network for narrowband (POTS) access.
  • CPE Customer Premises Equipment
  • POTS narrowband
  • the method includes the steps of providing a wireless local network as a
  • the method particularly includes the steps of providing a base station, e.g. a DECT base station with an antenna as a radio user interface.
  • a base station e.g. a DECT base station with an antenna as a radio user interface.
  • a conventional POTS interface may also be provided in addition to the wireless local network. Then the narrowband access means
  • .5 comprises a BS as well as a conventional POTS interface.
  • any person i.e. the subscriber himself may easily install a system/an arrangement allowing broadband access in addition to narrowband access. It is also very advantageous to provide narrowband (telephony services) access by means of e.g. DECT.
  • FIG. 3 shows one example of an installation utilizing a combined, integrated entity comprising a splitter filter, a broadband network termination and a base station,
  • Fig. 4 shows one implementation of a combined entity comprising a splitter filter, narrowband access means, comprising a
  • DECT base station and broadband access means comprising an ADSL network termination when the customer premises is connected to a PSTN,
  • Fig. 5 shows one example on an integrated entity comprising a splitter filter, an ADSL network termination and narrowband access means comprising an ISDN network termination when the customer premises is connected to an ISDN,
  • Fig. 6 schematically illustrates a customer premises as in Fig. 3 wherein a splitter filter is connected to a telephony jack and wherein narrowband and broadband access means are provided in a common entity,
  • Fig. 7 shows a customer premises similar to that of Fig. 3 wherein a combined entity comprising a splitter filter and broadband access means is connected to a jack and wherein separate narrowband access means are provided,
  • Fig. 8 shows another example on a customer premises wherein a combined entity comprising a splitter filter and a narrowband access means is connected to a telephony jack and wherein the broadband access means are provided separately
  • Fig. 9 is a schematical flow diagram describing one way of providing of broadband (and narrowband) access to a customer premises according to one embodiment
  • Fig. 10 is a flow diagram describing one example on installation of an arrangement for providing broadband and narrowband access at a customer premises wherein an integrated device with splitter filter, broadband NT and a DECT BS is used.
  • Customer premises 10 of Fig. 3 is via, e.g. a twisted, pair cable 1 connected to a central office 100 (supporting ADSL services) of for example a PSTN (not shown) .
  • a central office 100 supporting ADSL services
  • PSTN public switched telephone network
  • a plurality of telephony jacks 11, 12, 13, 14, 15, 16, 17, 18 ' , 19 already are provided at the customer premises 10.
  • the splitter filter by necessity would have had to be provided before the branching point V.
  • any one of the telephony jacks can be selected, and in this specific embodiment telephony jack 17 is selected.
  • the splitter filter, the broadband network termination broadband (BB) NT and the narrowband network termination, here comprising a base station BS, are all integrated in a common entity 50 to which base station antenna means 45 is connected.
  • POTS telephony
  • narrowband access is here distributed via a separate network comprising a wireless local network, for example DECT and the (DECT) base station can be said to be integrated or included in the broadband network termination, particularly an ADSL NT.
  • From jack 17 are thus narrowband services or POTS services as well as broadband services distributed.
  • a POTS interface may be provided to support telefax, answering machines etc. (not shown in this Fig.).
  • the combined entity also comprises a broadband user interface 51 e.g.
  • Customer Premises Equipment CPE 60 e.g. a PC or some other equipment is connected to the broadband user interface 51.
  • PP portable parts
  • hand sets 46A, 46B,46C communicate via radio with base station BS over antenna 45.
  • the existing cabling at the customer premises is thus used to distribute narrowband as well as broadband services and the existing distribution network or cabling is used as a distribution network for both narrowband and broadband services and any jack can be used for connection of the combined entity
  • Fig. 4 illustrates one example on an integrated entity 50 ⁇ e.g. for broadband access using ADSL over PSTN.
  • the combined or integrated entity 50j here comprises a splitter filter 20 ⁇ comprising a low-pass filter LP 21 ⁇ and a high-pass filter HP 22 ⁇ .
  • the low-pass filter 21 ⁇ blocks the ADSL high frequencies in order to prevent them from reaching the POTS telephones or the wireless communication system whereas the high-pass filter 22 ⁇ blocks the lower frequency signals from reaching the ADSL NT 30 ⁇ .
  • the ADSL NT 30 ⁇ terminates the ADSL signals and it comprises an ADSL modem, a first user interface 1 and a second user interface 2 (in this case) e.g.
  • the combined entity here comprises a DECT base 5 station 40 ⁇ with a base station antenna 45 ⁇ for distribution of narrowband services.
  • a POTS interface 41 is also provided for connection of e.g. a telefax and/or an answering machine .
  • FIG. 5 shows another example on a combined, integrated entity 50 2 for providing broadband services access (and narrowband services access) by means of ADSL over ISDN. Then should also an ISDN network termination functionality be included. Also in this embodiment it is supposed that a splitter filter 20 2 , broadband
  • the twisted pair cable 1 (of course it also may be any other appropriate cable) is used for communication with ISDN and is connected to splitter filter 20 2 with high-pass filter 21 2 and low-pass filter 22 2 as described above.
  • the broadband access means comprising an ADSL NT 30 2 which comprises an ADSL modem and, for example, three user interfaces, e.g. USB, Ethernet, LAN etc. which interfaces 51n, 51 ⁇ 3 , 51 ⁇ 2 are connected to Customer Premises Equipment such as PCs etc (not shown) .
  • the ADSL NT 30 2 which comprises an ADSL modem and, for example, three user interfaces, e.g. USB, Ethernet, LAN etc. which interfaces 51n, 51 ⁇ 3 , 51 ⁇ 2 are connected to Customer Premises Equipment such as PCs etc (not shown) .
  • the !5 low-pass filter output is connected to an ISDN network termination 40A 2 comprising an ISDN modem, a POTS line circuit and a 2B+D interface 41 3 .
  • the 2B+D interface comprises two 64 kbps channels for speech and data and a 16 kbps channel for control signalling, as is well known in the art.
  • the narrowband access means thus comprises an ISDN NT 40A 2 , with ISDN interface 41 3 , a DECT base station 40A 3 and a conventional POTS interface 41 2 .
  • Fig. 6 shows still an alternative implementation.
  • the customer premises is connected to for example PSTN over e.g. a twisted pair cable 1 as in the preceding embodiments, and, for reasons of simplicity, it comprises telephony jacks 11,...., 19 as in Fig. 3.
  • telephony jack 15 is selected and a separate splitter filter 20 3 comprising a high-pass filter and a low-pass filter as above is connected to it via a cable.
  • an integrated entity 50 3 is provided but in this case it merely comprises narrowband access means 40 3 , e.g.
  • broadband access means comprising a ADSL NT 30 3 connected to the low-pass and the high- pass outputs of the splitter filter 20 3 respectively.
  • the narrowband access means also comprises a conventional POTS interface and a base station antenna 45 3 is connected to base station BS .
  • a user interface for broadband services provides for communication between ADSL NT 30 3 and Customer Premises Equipment CPE 60 3 . This is an example illustrating that a splitter filter can be provided separately whereas broadband and narrowband access means respectively are provided in a common entity.
  • Fig. 7 again shows a customer premises to which a twisted pair cable or any other appropriate cable 1 is connected and a distribution network comprising telephony jacks 11,... ,19.
  • a distribution network comprising telephony jacks 11,... ,19.
  • jack 12 is selected and that a combined entity 50 4 comprises a splitter filter 20 4 with a high-pass and a low-pass filter respectively as discussed above and the combined entity furthermore includes the ADSL NT 30 4 , i.e. the broadband access means with, here, two user interfaces e.g. of the kinds as described above.
  • the narrowband access means comprises a base station 40 4 which is provided separately, i.e. it is not provided in the same entity or box as the broadband access means and the splitter filter. Like in preceding embodiments, it is connected to the low-pass output of the splitter filter 20 4 .
  • base station antenna illustrated since it is obvious for any one skilled in the art that it has to be provided and it is also illustrated through the preceding figures. It is also in this embodiment possible to have a conventional POTS interface as discussed above even if it is not shown in the figure, as forming part of the narrowband access means.
  • Fig. 8 shows still another alternative implementation in which a customer premises comprises a distribution network communicating over e.g. a twisted pair cable 1 with a communications network, e.g. PSTN.
  • a number of telephony jacks are provided and the distribution network has a different configuration from the one of the preceding figures. It is here supposed that a jack 15' is selected.
  • the combined entity 50 5 here comprises a splitter filter 2O 5 and narrowband access means 40s comprising a base station with a base station antenna.
  • An ADSL NT 30 5 is connected to the high-pass filter output.
  • the narrowband access means are illustrated as comprising a base station, e.g. a DECT base station, it should be clear that, for e.g. ADSL over ISDN, an ISDN network termination would have to be provided as a part of the narrowband access means connected to the low-pass filter output and preceding e.g. a base station. It should also be clear that, instead of a base station, a separate network may be provided for distribution of narrowband, e.g. POTS services. However, it is extremely advantageous to use a wireless local network, since then there is no need to install a network within the customer premises.
  • splitter filter, narrowband access means and broadband access means can be provided as separate entities, particularly may any known ADSL NT, DECT BS and splitter filter available on the market be used.
  • Fig. 9 is a very schematical flow diagram describing one example on the provision of broadband access by ADSL at a customer premises. It is then supposed that first all user equipment, e.g. POTS telephones, fax machines, answering machines etc., are
  • one of the telephony jacks is selected e.g. the one where broadband services access is needed, 102, to which at least a splitter filter is to be connected.
  • the splitter filter is then, preferably detachably, connected to the selected telephony jack,
  • the broadband access means are connected to the high frequency port of the splitter filter, 104 and the narrowband access means, e.g. a base station, is connected to the low frequency port of the splitter filter, 105. It does not matter whichever of steps 104, 105 comes first or it may be
  • PPs Portable Parts
  • PCs broadband user interfaces of the broadband access means
  • FIG. 10 there is another flow diagram illustrating one example on installation of broadband and narrowband services access by ADSL at a customer premises.
  • a telephony jack is selected, which here is to be used for the provision of broadband services access, 202.
  • a device comprising an integrated splitter filter/ADSL NT/DECT BS is connected to the selected jack, 203.
  • the DECT handsets are placed wherever needed within coverage of the DECT BS, 204, and a charging station for portable parts for communication with the DECT BS is placed wherever it is appropriate and connected to the power supply.
  • one or more PCs or other Customer Premises Equipment CPE is/are connected to broadband user interfaces, of the integrated device, 205 and, optionally, faxes, answering machines etc. may be connected to one or more POTS interfaces, if any, of the integrated device, 206.
  • inventive concept is applicable also when there is no existing (POTS) distribution network at the customer premises. Then a distribution network is provided or installed and a jack (for broadband as well as narrowband services) is selected and a splitter filter, possibly with an integrated ADSL NT and appropriate narrowband access means (a separate network, e.g. a BS for cordless telephony, possibly a POTS interface, and possibly also an ISDN NT) is connected thereto.
  • a separate network e.g. a BS for cordless telephony, possibly a POTS interface, and possibly also an ISDN NT

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)

Abstract

La présente invention concerne la fourniture à des clients de locaux (10) disposant d'un accès à des services de communication de données large bande et d'un accès à des services de télécommunication bande étroite à l'aide d'un câble (1) d'un réseau de communication public (RTPC, RNIS). Un réseau de distribution comprenant un certain nombre de prises (téléphoniques) (11, ..., 19) dans les locaux d'abonnés (10) est mis à disposition et la technologie ADSL est appliquée. Le réseau de distribution est utilisé comme réseau de distribution pour les signaux haute fréquence de la communication large bande comme pour les signaux basse fréquence de la communication bande étroite, et une prise optique (téléphonique) est utilisée pour la connexion d'un filtre séparateur (50) permettant de séparer les signaux haute fréquence des signaux basse fréquence. Des moyens d'accès large bande (50) sont connectés à un port haute fréquence du filtre séparateur et des moyens d'accès bande étroite (50) sont connectés à un port basse fréquence du filtre séparateur. Chacun de ces moyens d'accès large bande et d'accès bande étroite comprennent un certain nombre d'interfaces utilisateurs.
PCT/SE2001/002369 2000-10-30 2001-10-30 Systeme et procede procurant un acces de communication de donnees bande large et un acces de telecommunication bande etroite par rtpc/rnis WO2002037818A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002211175A AU2002211175A1 (en) 2000-10-30 2001-10-30 Arrangement and method for providing broadband data communication access and narrowband telecommunication access through a pstn/isdn

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US24433500P 2000-10-30 2000-10-30
EP00123686A EP1202544A1 (fr) 2000-10-30 2000-10-30 Système et procédé de distribution de données et de vocales
US60/244,335 2000-10-30
EP00123686.8 2000-10-30

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795977A2 (fr) * 1996-03-15 1997-09-17 Motorola, Inc. Procédé pour la transmission simultanée d'un signal "ADSL" et un signal ISDV
WO1999025098A1 (fr) * 1997-11-10 1999-05-20 Ameritech Corporation Systeme et procede de distribution de donnees et d'informations vocales sur des reseaux sans fil et des reseaux cables
EP0966147A2 (fr) * 1998-05-28 1999-12-22 Siecor Operations, LLC Dispositif séparateur DSL pour l'utilisation à l'intérieur
WO2000019767A2 (fr) * 1998-09-30 2000-04-06 Infineon Technologies Ag Dispositif de terminaison de ligne pour ligne de raccordement d'abonne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795977A2 (fr) * 1996-03-15 1997-09-17 Motorola, Inc. Procédé pour la transmission simultanée d'un signal "ADSL" et un signal ISDV
WO1999025098A1 (fr) * 1997-11-10 1999-05-20 Ameritech Corporation Systeme et procede de distribution de donnees et d'informations vocales sur des reseaux sans fil et des reseaux cables
EP0966147A2 (fr) * 1998-05-28 1999-12-22 Siecor Operations, LLC Dispositif séparateur DSL pour l'utilisation à l'intérieur
WO2000019767A2 (fr) * 1998-09-30 2000-04-06 Infineon Technologies Ag Dispositif de terminaison de ligne pour ligne de raccordement d'abonne

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"DSL modem for FC9660RA 12", INSTALLATION GUIDE FJTU-320-600-900, no. 2 REV. 2, February 2000 (2000-02-01) *
CHOW, P.S. AND CIOFFI, J.M.: "A multi-drop in-house ADSL distribution network communications, 1994. ICC'94", SUPERCOMM/CONFERENCE RECORD, SERVING HUMANITY THROUGH COMMUNICATIONS. INTERNATIONAL CONFERANCE, vol. 1, 1 May 1994 (1994-05-01) - 5 May 1994 (1994-05-05), pages 456 - 460 *

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