WO1998011758A1 - Unite terminale pour reseau de telecommunication - Google Patents

Unite terminale pour reseau de telecommunication Download PDF

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Publication number
WO1998011758A1
WO1998011758A1 PCT/DE1997/001907 DE9701907W WO9811758A1 WO 1998011758 A1 WO1998011758 A1 WO 1998011758A1 DE 9701907 W DE9701907 W DE 9701907W WO 9811758 A1 WO9811758 A1 WO 9811758A1
Authority
WO
WIPO (PCT)
Prior art keywords
interface
network termination
data
unit
termination unit
Prior art date
Application number
PCT/DE1997/001907
Other languages
German (de)
English (en)
Inventor
Michael Alger-Meunier
Yousif Ammar
Dieter Schmidtlein
Stephan Dosch
Original Assignee
Siemens Aktiengesellschaft
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
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1998011758A1 publication Critical patent/WO1998011758A1/fr

Links

Classifications

    • 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
    • H04Q11/0435—Details
    • H04Q11/0471—Terminal access circuits
    • 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
    • H04Q2213/1309—Apparatus individually associated with a subscriber line, line circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13096—Digital apparatus individually associated with a subscriber line, digital line circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13176—Common channel signaling, CCS7
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13194—Four wire connection, transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13202—Network termination [NT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13209—ISDN
    • 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
    • H04Q2213/13302—Magnetic elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13322—Integrated circuits

Definitions

  • the present invention relates to a telecommunications network termination unit according to the preamble of claim 1, i.e. a telecommunications network termination unit with a first interface for connecting to the telecommunications network, and a second interface for connecting telecommunications terminals.
  • Such a telecommunication network termination unit is, for example, a so-called NT unit (network termination unit) of an ISDN telecommunication system.
  • the NT unit which is usually still installed at the ISDN subscriber, forms the interface between the facilities of the ISDN operator (exchange offices, line network, etc.) and the facilities of the ISDN subscriber (subscriber lines, telecommunications terminal equipment such as telephones, faxes, etc.) .).
  • the NT unit is capable of communicating with a central office or a so-called LT unit (line termination unit) of the ISDN operator via the same line network, which in ISDN systems acts as a so-called U interface (U interface) ) is designed to receive (U-) data, convert it with regard to the format and, if necessary, process it in some other way, and finally set it up as (S-) data via an S-interface (S-interface) to the ISDN subscribers to spend.
  • U interface U interface
  • S-interface S-interface
  • FIG. 3 shows a schematic illustration to illustrate the situation just described in words.
  • the system shown in FIG. 3 consists of an ISDN operator section labeled B (shown on the left) and an ISDN subscriber section labeled T (shown on the right).
  • the ISDN operator section B includes a switching office 1, which is closed to the outside by an LT unit 2.
  • the switching office 1 is connected to the ISDN subscriber section T via a line network (U interface), more precisely to a first interface of an NT unit 3 provided there.
  • the NT unit 3 is connected to up to eight ISDN telecommunication terminal devices via a second interface by means of subscriber lines (S interfaces), each designated S.
  • S interfaces subscriber lines
  • ISDN telecommunication terminal devices are an ISDN telephone 41 and an ISDN facsimile device 42.
  • the NT unit 3 contains a U-side section 31 shown on the left in FIG. 2, hereinafter referred to as U part for the sake of simplicity, and an S section shown on the right in FIG. 3, hereinafter referred to as S part for simplicity.
  • Section 32 U-side data (data packets) arriving on the U-side, ie received via a first interface of the NT unit 3, are converted into a so-called IOM format by the U-part 31, and the resulting (IOM- ) Data (data packets) are in turn - if necessary after processing them in the meantime - converted into an S format by the S part 32 and output to the connected ISDN telecommunications terminal equipment via a second interface of the NT unit 3.
  • incoming (S) data data packets
  • IOM data data packets
  • the NT unit 3 converts the 2-wire U interface to the 4-wire S interface.
  • NT unit 3 As the structure of the NT unit 3 described above already suggests, only specially prepared devices, more precisely only ISDN devices, can be connected to its second interface as telecommunication terminal devices.
  • the terminal adapter performs on the one hand a digital / analog conversion or an analog / digital conversion of the data transferred between the non-ISDN device and the NT unit and on the other hand ensures that the non-ISDN device of the NT -Unit and the ISDN operator equipment appears like a "normal" ISDN device.
  • it is particularly necessary, among other things, to monitor, evaluate, change and / or generate new packet and signaling data transmitted or to be transmitted via a so-called D channel of the ISDN.
  • the ISDN provides B channels for useful data transmission and D channels for packet data and signaling data transmission, and that B channel data and D channel data nested with one another and mixed together with other control information in a ⁇ units of data packets (data frame) as a data stream via the line network and the subscriber lines is transferred.
  • B channels and D channels for each subscriber connection, which are provided and treated in the manner mentioned.
  • the terminal adapter described above has a relatively complicated structure due to its sometimes very complex tasks and is therefore prone to failure and expensive.
  • the present invention is therefore based on the object of developing the telecommunications network termination unit in accordance with the preamble of claim 1 in such a way that it enables a simpler connection of non-ISDN devices to the ISDN.
  • a third interface is provided on the telecommunications network termination unit for connecting devices that are not designed for direct connection to the second interface.
  • the terminal adapter previously provided for connecting non-ISDN devices can be integrated into the telecommunications network termination unit, ie into the NT unit, and on the other hand, the data transferred via this third interface can be replaced quickly instead of in the case of second interface to be used S-format have a format that corresponds to the format of the data which the first interface of the NT unit can be exchanged, that is, come closer to the U format or can be converted into or generated from it with less effort.
  • the at least partial integration of the terminal adapter in the NT unit enables an optimal adaptation of the integrated terminal adapter part to the actual NT unit and thereby ensures a trouble-free interaction of these units, particularly when the NT unit and the terminal adapter comes from different manufacturers, sometimes not.
  • a telecommunication network termination unit was therefore found which enables a simple, but at the same time less interference-prone connection of non-ISDN devices to the ISDN.
  • Show it 1 schematically shows the structure of the telecommunications network termination unit according to the invention in the form of an NT unit provided for the ISDN,
  • FIG. 2 shows schematically the use of the NT unit 100 shown in FIG. 1 for connecting Ni'cht ISDN telecommunications terminal equipment to the same, and
  • Figure 3 schematically shows the structure of an ISDN system having a conventional NT unit.
  • the invention is described below specifically with reference to telecommunication network termination units which can be used in ISDN systems, in particular with reference to the NT units already explained at the beginning.
  • the telecommunication network terminal unit according to the invention can also be a device other than an NT unit and can also be used in principle in any other telecommunication system other than ISDN telecommunication systems.
  • the interface names used represent comprehensive generic terms, each of which may encompass all of the interface designs that can be subsumed below. So to name just a few examples, among other things, the Uk and UkO interfaces through the general umbrella term U interface, the SO interface through the general The generic term S-interface and the IOM-2 interface are encompassed by the general generic term IOM interface. The same applies here too for the data (package) format designations named after the respective interfaces.
  • the NT unit shown in FIG. 1 is identified there by reference number 100.
  • the first interface 110 is used for connection to a U-interface of the ISDN system, the second interface 120 for connecting ISDN telecommunication terminal devices, and the third interface 130, 140 for connecting non-ISDN telecommunication terminal devices such as analog telephones or Fax machines.
  • the first interface 110 has a first data stream conversion unit in the form of a U part 150 of the NT unit 100
  • the second interface 120 has a second data stream conversion unit in the form of an S part 160 of the NT unit 100
  • the third interface 130 , 140 with the S-part 160, a D-channel control unit 180, and an IOM line 170 connecting the U-part 150 and the S-part 160.
  • the U part 150 of the NT unit 100 essentially corresponds to the U part 31 of the conventional NT unit 3, the S part 160 to the S part 32 and the IOM line 170 of the connection designated IOM between the U part 31 and the S part 32.
  • data or data formats having the IOM format are transferred via the IOM line 170, as their name already suggests. This is always assumed in the following explanations. Nevertheless, there is no restriction to this. Basically, those transferred via the IOM line 170 can. (which are introduced through the U-part 150, the S-part 160 and the third interface 130, 140) data or data packets also have any other format.
  • the control of the S-part 160 via the control data interface 130 serves primarily for its activation and deactivation and for a fair distribution (arbitration) of the access rights to the D-channel, which will be explained in more detail later.
  • the D-channel control unit 180 which is not present in conventional NT units, is a so-called HDLC controller and, as the name suggests, has the function of monitoring, evaluating and / or changing data transmitted via the D-channel of the ISDN and / or to generate data to be transmitted via the D channel and to feed it into it.
  • the D-channel control unit 180 which is not present in conventional NT units, is a so-called HDLC controller and, as the name suggests, has the function of monitoring, evaluating and / or changing data transmitted via the D-channel of the ISDN and / or to generate data to be transmitted via the D channel and to feed it into it.
  • the D-channel control unit 180 accesses the D-channel via a connection to the IOM line 170.
  • the D-channel control unit 180 can at least partially take on the tasks that an adaptation logic (terminal adapter) has to fulfill in order to be able to connect a non-ISDN device as or as an ISDN telecommunication terminal to the ISDN; it is controlled via the control data interface 130, in particular as a function of the type and number of non-ISDN devices that are connected to the third interface 130, 140 of the NT unit.
  • the user data exchange between the non-ISDN devices and the NT unit takes place via the user data interface 140.
  • the user data interface 140 is connected to the IOM line 170 via a PCM line (not shown in FIG. 1); in the example considered, it is an IOM-like PCM interface.
  • non-ISDN devices can be connected as or as ISDN telecommunication terminal devices via the control data interface 130 and the user data interface 140.
  • connection of telecommunication terminals via a different than the second or S-interface 120 of the NT unit 100 makes it necessary to ensure that none of the up to eight ISDN devices connected to the second or S-interface 120 and additionally none of the non-ISDN devices connected via the third interface 130, 140 is permanently denied access to the (single) D channel.
  • an arbitration mechanism present on the S interface is acted upon, which ensures that none of the eight telecommunications terminal devices connectable to the second or S interface is permanently denied access to the D channel.
  • the said action on the arbitration mechanism of the S-interface takes place by an external control via the control data interface 130.
  • the existing arbitration mechanism provided on the S-interface is accessed via the S-part 160, which deviates from the S- Part of conventional NT units offers appropriate intervention options.
  • Non-ISDN devices to the third interface 130, 140 of the previously explained NT unit 100 are described.
  • the NT unit 100 shown in FIG. 2 is the NT unit 100 previously described with reference to FIG. 1; identical reference symbols in FIGS. 1 and 2 designate identical elements.
  • the non-ISDN devices that are to be connected to the ISDN via the NT unit 100 are, in the example considered, conventional analog telephones, for whose connection so-called a / b connections are to be provided.
  • FIG. 2 shows two a / b connections, designated by reference numerals 211 and 221.
  • the number of devices that can be connected to the ISDN via the third interface 130, 140 of the NT unit 100 can in principle be as high as desired.
  • SLICs subscriber line interface circuits
  • SLICs subscriber line interface circuits
  • SLICs are (subscriber line interfaces) circuits which are used in particular for signal level adaptation and amplification (analog telephones sometimes work with several ten volt high voltages) and for counting pulse processing.
  • the SLICs 210 and 220 are connected to an adaptation unit 200, which in turn is connected to the user data interface 140, the control data interface 130 and a system control unit 300.
  • the adaptation unit 200 can be of relatively simple construction since essential parts of the adaptation logic to be provided for connecting non-ISDN devices to the ISDN are already accommodated in the NT unit 100, more precisely in particular in the D-channel control unit 180.
  • the adaptation unit 200 is implemented by a so-called CODEC filter, which does nothing else than convert analog signals into a implement digital pulse train (coding process) and vice versa (decoding process).
  • the signals coded by the adaptation unit 200 are sent via the user data interface 140 of the NT unit 100 directly to the IOM line 170, where they are fed into one of the B channels of the data stream transmitted thereover. Conversely, data received from the B channels - insofar as it is intended for the non-ISDN devices - is decoded by the adaptation unit 200 and output to the non-ISDN devices via the downstream SLICs.
  • this and / or the downstream SLICs require different types of control.
  • the adaptation unit 200 and / or the SLICS 210, 220 are controlled via the system control unit 300, which in the example under consideration may be implemented by a microprocessor, microcontroller or the like.
  • Said system control unit 300 not only controls the adaptation unit 200 and / or the SLICs 210, 220, but also (via the control data interface 130) the NT unit 100.
  • the control data interface 130 and the D-channel control unit 180 are shown in FIG 2 combined into a common NT control unit 190.
  • adaptation unit 200 there can be varied variations in the structure and / or in the control of the same and / or the downstream SLICs 210, 220.
  • adaptation unit 200 is implemented by one or more CODEC filters.
  • the adaptation unit 200 shown in FIG. 2 which can be implemented, for example, by the Siemens component PEB 2466 (SICOFI4- ⁇ C), is designed to connect four analog telecommunication terminal devices and is controlled as described with reference to FIG. 2.
  • adaptation unit 200 can be implemented by one or more PEB 2161 (ARCOFI-BA) Siemens modules connected in parallel, to which, in contrast to the illustration in FIG. 2, only a single SLIC, additionally connected to the system control unit 300, can be connected is.
  • PEB 2161 ARCOFI-BA
  • Such frame strobe signals are preferably generated by the D-channel control unit 180 or the NT control unit 190.
  • Unit 100 can be used not only as a telecommunications network termination unit, but also as an interface that can be connected to various types of telecommunications network termination units for connecting a computer or the like to the ISDN.
  • the described NT unit can be used as the telecommunication network termination unit described in detail above.
  • the second of said operating modes it can be used as an interface for connecting a computer or the like to the ISDN via various types of telecommunication network termination units.
  • the NT unit used as the computer interface is connected to the ISDN either selectively or simultaneously via its first interface 110 and its second interface 120, the connection 110 for connection to a U-interface of the ISDN and the connection 120 is designed for connection to an S interface of the ISDN, that is, to an NT unit or the like.
  • connection of the NT unit used as the computer interface to the computer to be connected to the ISDN like a telecommunications terminal is carried out via the third interface 130, regardless of whether the connection to the ISDN has to be made via a U interface or via an S interface. 140 of the NT unit 100.
  • the user data are exchanged between the ISDN and the connected device, which may be a computer in the example under consideration, via the user data interface 140; Via the control data interface 130, the NT unit is put into a state which enables the NT unit 100 to be connected to a telecommunications network termination unit of the ISDN like a telecommunication terminal.
  • the technical requirements that a device must meet in order to be a telecommunications terminal Being able to be properly connected to the ISDN are known and do not require any further explanation here.
  • the U part 150 and / or the S part 160 are designed such that they can be selectively activated and deactivated via the control data interface 130.
  • IOM data output (to be sent) by the computer 200 is input by the computer 200 via the user data interface 140 into the NT unit 100, there via the said PCM line into the IOM line 170 fed in, forwarded via this to the U part 150 and / or to the S part 160, converted there into U and / or S data and via the first interface 110 (in the case of U data) and / or the second Interface 120 (in the case of S data) output.
  • U data received via the first interface 110 are converted into the IOM format by the U part 150, output to the IOM line 170 and from there via the PCM line and the user data interface 140 to the computer 200 forwarded, and / or
  • S data received via the second interface 120 are converted into the IOM format by the S part 160, output to the IOM line 170 and from there via the PCM line and the user data interface 140 to the computer 200 forwarded.
  • the NT unit described is preferably integrated into a single chip.
  • Such an 1-chip NT unit is extremely versatile and flexible to use, on the one hand, and very easy to use and (due to the ideal coordination of the individual chip components with one another) can be operated without problems.

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

Abstract

L'invention a pour objet une unité terminale pour réseau de télécommunication (100), présentant une première interface (110) pour le raccordement au réseau de télécommunication, et une deuxième interface (120) pour le raccordement des équipements émetteurs. L'unité terminale selon l'invention est caractérisée en ce qu'il est prévu une troisième interface (130, 140) pour le branchement d'appareils qui ne sont pas prévus pour un raccordement direct à la deuxième interface.
PCT/DE1997/001907 1996-09-11 1997-09-01 Unite terminale pour reseau de telecommunication WO1998011758A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19636951.7 1996-09-11
DE1996136951 DE19636951A1 (de) 1996-09-11 1996-09-11 Telekommunikationsnetz-Abschlußeinheit

Publications (1)

Publication Number Publication Date
WO1998011758A1 true WO1998011758A1 (fr) 1998-03-19

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PCT/DE1997/001907 WO1998011758A1 (fr) 1996-09-11 1997-09-01 Unite terminale pour reseau de telecommunication

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DE (1) DE19636951A1 (fr)
WO (1) WO1998011758A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1187408A2 (fr) * 2000-09-06 2002-03-13 Texas Instruments Limited Module pour l'extension de un réseau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2793095B1 (fr) * 1999-04-28 2001-06-08 Sagem Terminaison numerique de reseau generalisee adaptable a un reseau temporairement analogique

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02177754A (ja) * 1988-12-28 1990-07-10 Nec Home Electron Ltd 宅内伝送装置
JPH053577A (ja) * 1991-06-24 1993-01-08 Nitsuko Corp ボタン電話装置
EP0555015A2 (fr) * 1992-02-07 1993-08-11 AT&T Corp. Dispositif d'interface entre des postes téléphoniques analoges et des terminaux de données numériques et une ligne RNIS
US5404491A (en) * 1989-07-13 1995-04-04 Alcatel N.V. Subscriber module for connection to a plurality of subscriber terminals and to an integrated services digital communication network (ISDN)
EP0668706A2 (fr) * 1994-01-27 1995-08-23 Siemens Schweiz AG Terminal de réseau
EP0741500A2 (fr) * 1995-05-05 1996-11-06 Alcatel SEL Aktiengesellschaft Système de télécommunication

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3917029C1 (en) * 1989-05-24 1990-10-31 Kapsch Ag, Wien, At ISDN communications system termination unit - uses microprocessors to facilitate exchanges, and has converters coupled to multiplexing line
US5036513A (en) * 1989-06-21 1991-07-30 Academy Of Applied Science Method of and apparatus for integrated voice (audio) communication simultaneously with "under voice" user-transparent digital data between telephone instruments
DE4008667A1 (de) * 1990-03-17 1991-09-19 Telefonbau & Normalzeit Gmbh Schaltungsanordnung zum anschluss eines rechners an einem digitalen fernsprechendgeraet
DE4302723A1 (de) * 1993-02-01 1994-08-04 Deutsche Bundespost Telekom Vorsatzgerät zum Anschalten von analogen Telekommunikationsanlagen mit Dateneingang und ISDN-Datenendgeräten an das öffentliche ISDN-Netz
US5349640A (en) * 1993-06-24 1994-09-20 Rolm Company Option bus adapter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02177754A (ja) * 1988-12-28 1990-07-10 Nec Home Electron Ltd 宅内伝送装置
US5404491A (en) * 1989-07-13 1995-04-04 Alcatel N.V. Subscriber module for connection to a plurality of subscriber terminals and to an integrated services digital communication network (ISDN)
JPH053577A (ja) * 1991-06-24 1993-01-08 Nitsuko Corp ボタン電話装置
EP0555015A2 (fr) * 1992-02-07 1993-08-11 AT&T Corp. Dispositif d'interface entre des postes téléphoniques analoges et des terminaux de données numériques et une ligne RNIS
EP0668706A2 (fr) * 1994-01-27 1995-08-23 Siemens Schweiz AG Terminal de réseau
EP0741500A2 (fr) * 1995-05-05 1996-11-06 Alcatel SEL Aktiengesellschaft Système de télécommunication

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
GYORKI J R: "ISDN BOARD PROTOTYPES COMMUNICATION SYSTEMS", MACHINE DESIGN, vol. 62, no. 8, 26 April 1990 (1990-04-26), pages 110, 113-114, 116, XP000127531 *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 448 (E - 0983) 26 September 1990 (1990-09-26) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 261 (E - 1369) 21 May 1993 (1993-05-21) *
SIEMENS AKTIENGESELLSCHAFT: "ISDN ORIENTED MODULAR (IOM) ARCHITECTURE - SECOND GENERATION ISDN ICS, IOM-2 INTERFACE", ICS FOR COMMUNICATIONS, 1989, pages 68, XP002018364 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1187408A2 (fr) * 2000-09-06 2002-03-13 Texas Instruments Limited Module pour l'extension de un réseau
EP1187408A3 (fr) * 2000-09-06 2002-10-23 Texas Instruments Limited Module pour l'extension de un réseau

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