EP1074155A2 - Unite de couplage a un reseau pour un systeme de communication - Google Patents

Unite de couplage a un reseau pour un systeme de communication

Info

Publication number
EP1074155A2
EP1074155A2 EP99927690A EP99927690A EP1074155A2 EP 1074155 A2 EP1074155 A2 EP 1074155A2 EP 99927690 A EP99927690 A EP 99927690A EP 99927690 A EP99927690 A EP 99927690A EP 1074155 A2 EP1074155 A2 EP 1074155A2
Authority
EP
European Patent Office
Prior art keywords
network
unit
igate
connection
terminal
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.)
Withdrawn
Application number
EP99927690A
Other languages
German (de)
English (en)
Inventor
Klaus Wehrend
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 AG, Siemens Corp filed Critical Siemens AG
Publication of EP1074155A2 publication Critical patent/EP1074155A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/4612—LAN interconnection over narrowband networks, e.g. N-ISDN, PSTN, X.25
    • 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
    • H04Q2213/13095—PIN / Access code, authentication
    • 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
    • H04Q2213/13106—Microprocessor, CPU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13141—Hunting for free outlet, circuit or channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13196—Connection circuit/link/trunk/junction, bridge, router, gateway
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13204—Protocols
    • 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
    • H04Q2213/1322—PBX
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13292—Time division multiplexing, TDM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1334—Configuration within the switch
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13405—Dual frequency signaling, DTMF

Definitions

  • connection options to a communication network brought up to the communication system are realized, for example, by means of primary multiplex connection units arranged therein, which are also referred to as S 2 M connections.
  • the communication network can be implemented, for example, by an ISDN-oriented communication network (Integrated Services Digital Network).
  • ISDN-oriented communication network Integrated Services Digital Network
  • a local data network for example an Ethernet LAN (local area network) connecting several personal computers
  • ⁇ Router 'de notes - a connection between the ISDN-oriented communication network and the local data network realized.
  • the y router ' is equipped both with an S 2 M _ interface and with a standard LAN interface, the S 2M interface with the output of the S 2M connection unit of the communication system and the LAN interface of the router' is connected to the local data network.
  • a ⁇ router With regard to its essential function, a ⁇ router 'realizes layer 3 (network layer) of the OSI reference model (Open Systems Interconnection), with the help of a' router 'physically networks with different topologies of layers 1 (physical layer) and 2 (data link layer) ) are connected - for example, Ethernet LAN and ISDN-oriented communication network.
  • OSI reference model Open Systems Interconnection
  • a' router 'physically networks with different topologies of layers 1 (physical layer) and 2 (data link layer) are connected - for example, Ethernet LAN and ISDN-oriented communication network.
  • the address details contained in the routing information of the data packets - destination and origin address - are interpreted and evaluated by a control device located in the ⁇ router.
  • the data packets are then converted in accordance with the protocol for transmission.
  • the external terminal is connected via the further user data connection to a computer connected to the local data network (often referred to in the literature as 'teleworking server'), which controls the transmission of the terminal-oriented signaling information between the communication system and the external terminal.
  • the data format of the user data connection is converted in an external 'router', e.g. the data format of an ISDN-oriented B channel to the data format of the local data network.
  • an S 2 M interface comprises on the one hand 30 user data channels, which are designed as ISDN-oriented B channels with a transmission rate of 64 kbit / s, and on the other hand, a signaling channel, which is an ISDN-oriented D channel with a transmission rate of 64 kbit / s is designed.
  • a signaling channel which is an ISDN-oriented D channel with a transmission rate of 64 kbit / s is designed.
  • the present invention is based on the object of specifying measures which optimize access to a local data network connected to a communication system, in particular as part of 'teleworking'.
  • An essential advantage of the network coupling unit according to the invention is that its design as a unit that can be integrated in the communication system, compared to an arrangement with an external 'router', considerably simplifies the system. Since the bidirectional time-multiplex-oriented coupling connections of the switching matrix module are connected directly to the local data network connected to the communication system via the network coupling unit or via the conversion unit arranged therein, data packets transmitted to the communication system or to the network coupling unit can be networks connected to the communication system - for example between an ISDN-oriented communication network and an Ethernet LAN - are transmitted via the network coupling unit arranged in the communication system using only the communication system.
  • the arrangement of the network coupling unit in the communication system means that an economically complex connection of an external 'router' - for example an 'ISDN router' - including the S 2M interface of the communication system necessary for connecting the external 'router' can be dispensed with, and thus also Inexpensive switching connection between a local data network - for example an Ethernet LAN - and the communication network - for example an ISDN-oriented communication network - can be created.
  • Another advantage of the network coupling unit according to the invention is that by concentrating the system components required for router functionality and for 'teleworking' on a common assembly, the program-related changes relating to their function are simple and without interfering with the central control of the communication system can be made.
  • Another advantage of the network coupling unit according to the invention is that the implementation of the necessary for a router functionality and for a 'teleworking' -ended system components on a common assembly nikationsnetz for providing realized by the communication system performance to an external Endgerat a Kiru ⁇ , only a payload (instead of two payload data) for the transmission of useful data and of endgerateo ⁇ ent faced Signaltechnischsmformatio- NEN between the external Endgerat and the network coupling unit must be built.
  • the performance features implemented by the communication system can also be provided on any external terminal devices - and not only on terminal devices designed for 'teleworking'.
  • 1 a structural diagram for the schematic representation of a communication system with a network coupling unit arranged thereon; 2: a structural diagram for the schematic representation of the essential functional units of the network coupling unit;
  • FIG. 3 a structural diagram for the schematic representation of two communication systems according to FIG. 1 arranged in a communication network.
  • FIG. 1 shows a schematic illustration of a communication system PBX with a network coupling unit arranged in it and configured as a subscriber line unit IGATE.
  • the PBX communication system has further participants.
  • Network connection units - a first and a second connection unit ABG1, ABG2 are shown by way of example - for connecting communication terminals or for a connection to further communication systems arranged in a communication network KN.
  • the communication system PBX contains one, several bidirectional, time-multiplex-oriented coupling connections KAl, ..., KAk having coupling field module KN, whereby the time-division-oriented coupling connections KAl, ..., KAk as PCM- Connections (pulse code modulation) - also referred to as PCM highways, speech highways or S 2M connections.
  • PCM- Connections pulse code modulation
  • Each PCM highway comprises 30 user channels, which are designed as ISDN-oriented B channels (I_ntegrated Services Digital Network) with a transmission rate of 64 kbit / s, and secondly, a signaling channel, which is an ISDN-oriented D channel is designed with a transmission rate of 64 kbit / s.
  • the switching matrix module KN is connected to a bidirectional, time-division-oriented PCM interface PCMS of the network coupling unit IGATE. Via the further PCM connections KAI, KA2, the switching network module KN is connected to a bidirectional, time-division-oriented connection SK of the first and the second connection unit ABG1, ABG2.
  • a control unit STE having a plurality of control connections SA1, ..., SAk is arranged in the communication system PBX.
  • the control unit STE is connected to a control input SM of the switching matrix module KN via a control connection SAk.
  • the control unit STE is connected on the one hand to an HDLC interface HDLCS arranged on the network coupling unit IGATE and on the other hand to control connections SM of the first and the second connection unit ABG1, ABG2.
  • a bidirectional, time multiplex-oriented terminal S 2M _ - the first arrival End unit ABG1 is a communication network KN consisting of a plurality of communication systems connected to one another - for example an ISDN-oriented communication network.
  • a first external terminal KE1 with a data processing device DV, which is configured, for example, as a personal computer or as a plug-in card for an existing terminal, and a second external terminal KE2 are connected to the communication network KN.
  • the second connection unit ABG2 has a first internal terminal KE3 with a communicating Call system internal call number 6833 and a second internal terminal KE4 with a call system internal call number 4711 connected to a second subscriber line T2.
  • a local area network LAN - e.g. an Ethernet LAN (Local Area Network) - is connected to the IGATE network coupling unit via a LAN interface LANS.
  • LAN interface LANS Through the local network LAN, several computers D-S, TW-R, e.g. 'Personal Computer' or 'Multimedia Workstations' - connected.
  • the network coupling unit IGATE has a LAN connection unit LAN-AE with a LAN interface LANS, the LAN interface LANS being connectable to the local network LAN.
  • the network coupling unit IGATE also has a PCM connection unit PCM-AE with a bidirectional, time-division-oriented PCM interface PCMS, the PCM interface PCMS being connectable to the coupling connection KAk of the switching matrix module KN of the communication system PBX.
  • the PCM connection unit PCM-AE "has a module switching matrix module which is connected to the PCM interface PCMS
  • a DTMF recognition unit DTMF and an output unit S-AE are also present in the PCM connection unit PCM-AE. orderly.
  • the DTMF recognition unit DTMF is used to recognize and evaluate control information received via a user data connection in the form of DTMF signals via the PCM interface PCMS.
  • the output unit S-AE is used to transmit stored voice messages via a user data connection to an external terminal KE2.
  • a signaling unit SE with an HDLC interface HDLCS is arranged on the network coupling unit IGATE.
  • the signaling unit SE can be connected to the control connection SA1 of the control unit STE of the communication system PBX via the HDLC interface HDLCS.
  • the LAN connection unit LAN-AE, the PCM connection unit PCM-AE and the signaling unit SE are each connected via a connection UA to a connection EL, EP, ES of a conversion unit MH arranged on the network coupling unit IGATE.
  • the conversion unit MH has a control unit SU. With the help of the control unit SU, data transmitted between the local area network LAN and the user data channels of the user interface brought to the network coupling unit IGATE are transmitted to the network coupling unit IGATE or to the LAN connection unit LAN-AE or the PCM connection unit PCM-AE or the signaling unit SE Communication network KN transmitted.
  • control unit SU of the conversion unit MH has an evaluation unit BW-R for evaluating routing information containing m data to be transmitted - ie target and source data - and a switching unit VM-R for transmitting the data from and to the local network LAN or from and to the communication network KN depending on the evaluation result. Furthermore, a conversion unit KV-R of the control unit SU converts signaling information in accordance with the protocol.
  • the signaling information received at the signaling unit SE converted into appropriate routing information and the user data arriving at the PCM connection unit PCM-AE, together with the routing information formed, converted into format-correct data, ie data adapted to the LAN format, and transmitted to the LAN connection unit LAN-AE.
  • the LAN connection unit LAN-AE or the LAN interface LANS is a unique, i.e. assigned worldwide valid identification or address. Since the applications implementing the data exchange - e.g. a software module implementing data exchange - the LAN connection unit LAN-AE has several, on different levels of the OSI reference model
  • Valid identifications or addresses are assigned to the levels of the OSI reference model.
  • the LAN connection unit LAN-AE is assigned a unique, module-specific LAN identification ac.
  • the module-specific LAN identification mac realizes a hardware address of the LAN interface LANS located on layer 1 of the OSI reference model and is stored in a non-volatile memory PROM arranged on the network coupling unit IGATE.
  • the LAN connection unit LAN-AE is assigned a unique logical network identification or network address ipag. This is 4 bytes long and represents an address of layer 3 of the OSI reference model - for example an Internet protocol address.
  • the logical network identification ipag identifies both the LAN connection unit LAN-AE and the local network LAN connected to the LAN connection unit LAN-AE.
  • the logical network identification ipag is stored in a memory area SP1 of a volatile memory SPF arranged on the network coupling unit IGATE.
  • the network coupling unit IGATE additionally has a control unit STW, which has a protocol unit PROT and a Has filter unit FWALL.
  • the control STW is connected via control connections SW to the LAN connection unit LAN-AE, the PCM connection unit PCM-AE, the signaling unit SE of the conversion unit MH and the memories PROM and SPF.
  • the PROT protocol unit realizes the transmission of data to be transmitted between the local area network LAN, the communication network KN and internal terminals KE3, KE4 connected to the communication system PBX.
  • the PROT protocol unit contains the Internet-specific protocols TCP / IP (Transmission Control Protocol /
  • H.323 as well as the PPP protocol (Point-to-Point Protocol) designed for the transport of TCP / IP data packets and H.323 data packets via a point-to-point connection and for H.320 protocol designed for the transmission of voice and data via an ISDN-oriented connection.
  • PPP Point-to-Point Protocol
  • the FWALL filter unit provides a safety decoupling of the networks LAN, KN connected to the IGATE network coupling unit.
  • the filter function implemented in the filter unit FWALL checks data access from the local network LAN to a possibly further local network within the communication system, and data access via the communication network KN to the local network LAN for authorization.
  • both the origin and destination addresses contained in the routing information of the data to be transmitted are checked for admissibility (this check is often referred to in the literature as a source and destination check).
  • the call number of the calling communication terminal is checked against a list (not shown) with predetermined, authorized call numbers (is often referred to in the literature as subscriber authentication) and thus impermissible connections when a connection is established via the communication network KN prevented via the communication network KN. Furthermore, the logical network identification ipag of data packets arriving at the LAN connection unit LAN-AE is checked. If the source address for the off ⁇ exchange authorized data via the network coupling unit IGATE, the destination address contained in the routing information under the above criteria is checked. In addition, an authentication check of the source address can be carried out using the PAP (Password Authentication Protocol) and CHAP (Challange Handshake Authentication Protocol) protocols provided in the PPP protocol.
  • PAP Password Authentication Protocol
  • CHAP Choallange Handshake Authentication Protocol
  • the routing functions implemented on the network coupling unit IGATE or on the conversion unit MH and the protocol unit PROT will result in the destination address or logical network identification contained in the data ipag rated. If the local network LAN is determined by the logical network identification ipag, the data are conveyed accordingly in the aforementioned manner via the conversion unit UE.
  • the volatile memory SPF also has a third memory area SP3 for storing logical target network identifications ipel, ..., ipek from further communication systems arranged in the communication network or the local networks connected to them, which are used for data exchange with the local one Network LAN or with the communication terminals connected to the local network LAN are provided.
  • a fourth memory area SP4 of the volatile memory SPF assigned to the third memory area SP3 a communication network identification rnl,..., Rnk from corresponding network coupling units arranged in the further communication systems is stored.
  • Each logical destination network identification ipel, ..., ipek stored in the third memory area Sp3 is at least one communication network identification rnl, ..., rnk assigned.
  • control unit STW he d network coupling unit IGATE arranged more Konvertie ⁇ approximation unit KVK-R is at, IPEL to a valve disposed in the communication network KN communication system to be transmitted data corresponding stored in the third memory area SP3 destination logical network identification, ... , ipek determined and based on the assigned communication network identification rnl, ..., rnk stored in the fourth memory area SP4, a corresponding user data connection is established via the communication network KN.
  • the network coupling unit IGATE is assigned a unique communication network identification rnw, which is stored in a second memory area SP2 of the volatile memory SPF.
  • the exchange of data between local networks LAN1, LAN2 connected to a network coupling unit IGATE1, IGATE2 and between a local network LAN1 and an external terminal KE11 connected to a communication network KN is to be explained in more detail using the structure diagram shown in FIG.
  • the structure picture shows a schematic representation of two communication systems PBX1, PBX2 arranged in a communication network KN and configured according to FIG. Both communication systems PBX1, PBX2 are connected to the communication network KN via a PCM connection unit PCM-AE1, PCM-AE2. Both communication systems PBX1, PBX2 have a network coupling unit IGATE1, IGATE2 according to FIG. 2.
  • the network coupling unit IGATE1 arranged in the first communication system PBX1 has a first " LAN connection unit LAN-AE1 with a - not shown - LAN interface.
  • the network coupling unit IGATE2 arranged in the second communication system PBX2 has a second LAN connection unit LAN-AE2 with a - not shown - LAN interface.
  • a logical network identification ipag2 140.7.27.0 is assigned to the second LAN connection unit LAN-AE2.
  • a first local area network LAN1 is connected to the first LAN connection unit LAN-AE1, via which a communication terminal KE10 is connected to the network coupling unit IGATE1 or to the first communication system PBX1.
  • the logical network identification i.e. the standardized internet protocol address is according to version 4, i.e. it consists of 4 bytes structured.
  • the local network can be clearly identified by the addressing information comprising the first 3 bytes and the communication terminal KE10 can be identified in the local network by the addressing information comprising the last byte.
  • a second local area network LAN2 is connected to the second LAN connection unit LAN-AE2, via which a communication terminal KE12 is connected to the network coupling unit IGATE2 or to the second communication system PBX2.
  • This is the second local area network LAN2 ⁇ connected communication terminal KE12 accordingly has the Internet Protocol address ipag 140.7.27.1 on.
  • terminal-oriented signaling information is provided which is based on a signaling protocol Cornet-TS, as is usually the case when exchanging signals between internal terminals KE3,
  • the transmission of the terminal-oriented signaling information between the external communication terminal and the communication system PBX is controlled, for example, by a computer arranged in the local area network LAN - referred to below as the teleworking computer TW-R.
  • a 'teleworking' registration is initiated by a subscriber on the first external terminal KE1
  • a user data connection DV - shown in dashed lines in FIG. 1 - between the first external terminal KE1 and the " teleworking computer TW-R via the network coupling unit IGATE the first connection unit ABGl, the switching matrix module KN and the network coupling unit IGATE.
  • F is ÜR the application of the first external terminal KEl at the telephoto ⁇ working machines TW-R by the subscriber, for example, the communication-system-internal telephone number of a subscriber associated internal terminal - for example, the number 4711 of the second internal terminal KE4 - and an associated subscriber-specific identification number PIN (Private Identification Number) - for example the PINA.
  • the registration information is transmitted to the teleworking computer TW-R via the user data connection DV.
  • the telephone number of a fictitious connection port - that is a purely logically available connection port of the PBX communication system that has only hardware components and has no hardware components - can alternatively be transmitted.
  • a check on the registration of the first external terminal KE1 takes place on the basis of a list (not shown) which is stored in the teleworking computer TW-R and which contains the telephone numbers or code numbers PIN authorized for 'teleworking'.
  • the teleworking computer TW-R will send the first external terminal KE1 a fictitious connection port - e.g. the fictitious connection port FP with the internal call number 3200 - assigned to the network coupling unit IGATE.
  • the 'call forwarding' feature implemented by the PBX communication system all calls directed to the internal connection port designated by the internal communication system number are redirected to the fictitious connection port FP of the network coupling unit IGATE.
  • the terminal-oriented signaling information is transmitted from the control unit STE of the communication system PBX to the network coupling unit IGATE, from which it is forwarded to the first external terminal KE1 in the manner described above.
  • connection establishment message is transmitted via the user data connection DV to the teleworking computer TW-R.
  • the teleworking computer TW-R forwards a connection establishment message for the fictitious connection port FP of the network coupling unit IGATE to the control unit STE of the communication system PBX.
  • a first step from the control unit STE of the communication system PBX is a partial connection between the fictitious connection port FP of the network coupling unit IGATE and the switching matrix module KN of the communication system PBX by occupying a constructed free useful channel of which Netzkopplungsemheit IGATE with the K ouble unit KN interconnecting PCM highways.
  • the teleworking computer TW-R transmits a readiness message to the first external terminal KE1 via the user data connection DV.
  • the first external terminal KE1 then sends in a reply message the number assigned to the first external terminal KE1 in the communication network KN to the teleworking computer TW-R.
  • a further partial connection to the first external terminal KE1 is set up, starting from a further fictitious connection port RP of the network coupling unit IGATE (often referred to in the literature as a remote port).
  • a dial tone sounds at the first external terminal (signals the readiness to give dialing information).
  • Dialing information - for example 6833 for the first internal terminal KE3 - is transmitted via the user data connection DV to the network coupling unit IGATE and from there forwarded to the control unit STE of the communication system PBX.
  • the control unit STE of the communication system PBX then sets up a terminal connection between the first internal terminal KE3 and the first external terminal KE1.
  • the first external terminal KE1 having to register with the telephone number of the second internal terminal KE4, which is internal to the communication system, is activated on the basis of the activated call forwarding for the second internal
  • Terminal KE4 of the communication system PBX a partial connection between the further terminal and the fictitious connection port F P of the network coupling unit IGATE.
  • a providing ⁇ shaft is transmitted message to the first external Endgerat KEl via the payload DV from the teleworking computer TW-R.
  • the first external terminal KE1 then sends in a response message the number assigned to the first external terminal KE1 in the communication network KN to the teleworking computer TW-R.
  • a further partial connection to the first external terminal KE1 is set up.
  • the partial connection and the further partial connection are coupled in the module coupling field module BG-KN of the network coupling unit IGATE, as a result of which the terminal connection between the first external terminal KE1 and the further terminal is established.
  • H.323 data packets based on the PPP protocol transmit the language and the terminal-oriented signaling information between the network coupling unit IGATE and the first external terminal KE1.
  • the terminal-oriented signaling information to be transmitted and the language are compressed and m, data packets based on the TCP / IP protocol are converted.
  • the further fictitious connection port RP of the network coupling unit IGATE is released by the teleworking computer TW-R and thus stands for a new connection between any terminal registered on the communication system PBX and another Terminal device available.
  • the fictitious connection port FP of the network coupling unit IGATE remains assigned to the first external terminal KE1 and is only released after the first external terminal KE1 has been deregistered by the subscriber.
  • Terminal KE4 with the communication system internal call number 4711 - transmitted.
  • control information in the form of DTMF signals (Dual Tone Multi Frequency) is transmitted via a voice Connection from the external terminal to the network coupling unit
  • IGATE communicates.
  • a characteristic signal is assigned to each key of a terminal, which signal is transmitted via the voice connection when the key is pressed.
  • the signal differs in frequency and signal duration from the data usually transmitted via the voice connection, so that the signals can be identified and evaluated on the IGATE network coupling unit.
  • the external terminal can be connected via any communication network, e.g. an analog communication network, an ISDN-oriented communication network or a radio network can be connected to the communication system.
  • the only requirements for the external terminal are that the DTMF dialing method (multi-frequency dialing method) for generating DTMF signals is supported by the external terminal.
  • a subscriber To register the second external terminal KE2 with the communication system PBX, a subscriber, for example, enters a 'teleworking' number on the second external terminal KE2. A voice connection is then set up between the second external terminal KE2 and the network coupling unit IGATE.
  • the output unit S-AE arranged on the network coupling unit IGATE transmits a first recorded voice message to the second external terminal KE2, which prompts the subscriber to send the second external terminal KE2 in Enter the network number assigned to the communication network KN - hereinafter referred to as manual identification.
  • the output unit S-AE transmits a second recorded voice message to the second external terminal KE2, which prompts the subscriber to enter a personal identification number PIN (Personal Identification Number).
  • PIN Personal Identification Number
  • This form of DTMF signals transmitted over the voice connection and identification data are evaluated by the DTMF recognition unit DTMF and forwarded to the teleworking computer TW-R via the LAN connection unit LAN-AE.
  • the second external terminal KE2 is identified as identified, for example by an entry of the second external terminal KE2 in a list (not shown), provided this has not already been done in an earlier identification.
  • the code PIN transmitted in the authentication data is used to determine the internal subscriber connection port of the communication system PBX via which the subscriber would like to log on to the communication system PBX using a list (not shown) stored in the teleworking computer TW-R. If, for example, the PIN A is transmitted as part of the authentication, the second external terminal KE2 is registered for the second internal terminal KE4. In addition, the participant can be asked to provide a personal password.
  • the teleworking computer TW-R checks whether the second external terminal KE2 has already been identified, ie whether there is already an entry for the second external terminal KE2 in the list. If the second external terminal KE2 has not yet been identified, the output unit S-AE of the network coupling unit IGATE transmits the second recorded voice message to the second external terminal KE2, which prompts the subscriber to enter the personal identification number PIN and / or the personal password.
  • the identification number PIN transmitted by the subscriber can alternatively be assigned to a fictitious connection port of the communication system PBX. This means that even subscribers who are not assigned a physically available internal terminal can use the features of the PBX communication system on the external terminal.
  • the registration of the second external terminal device KE2 is checked on the basis of a list (not shown) which is stored in the teleworking computer TW-R and which contains the telephone numbers or code numbers PIN authorized for the 'teleworking'. Once the verification has confirmed the registration, the teleworking computer TW-R assigns the fictitious connection port - for example the fictitious connection port FP with the telephone number 3200 within the communication system - to the network coupling unit IGATE from the second external terminal KE2.
  • all of the internal subscriber connection ports (for example the.) Identified by the number within the communication system or by the PIN code are activated second subscriber line T2 of the second line unit ABG2 with the communication system internal call number 4711) calls directed to the fictitious connection port FP of the network coupling unit IGATE.
  • the voice connection after logging in e.g. interrupted by hanging up the handset on the second external terminal KE2 (this corresponds to the normal case)
  • a new identification transmission of the number assigned to the second external terminal KE2 in the communication network KN
  • the authentication data must also be transmitted again.
  • terminal-oriented signaling information to be transmitted from the control unit STE of the communication system PBX to the second internal terminal KE4 - the registration of the second external terminal KE2 on the communication system PBX with the communication number internal to the communication system or code number of the second internal terminal KE4 is required - to the fictitious connection port FP of the network coupling unit IGATE redirected.
  • the terminal-oriented signaling information is m described above
  • a message transmitted by the control unit STE of the communication system PBX to the fictitious connection port FP (for example a terminal-oriented signaling information) is evaluated, and there are m cases in which this message is to be forwarded to the second external terminal KE2. converted into a voice message corresponding to the terminal-oriented signaling information.
  • the voice message is then te voice connection is transmitted to the second external terminal KE2 and output there, for example via a loudspeaker.
  • SMS-capable terminals Short Message Service
  • a message is transmitted to the responsible 'network provider', which transmits the corresponding text message to the terminal, on which the text message is output, for example on a display.
  • the second external terminal KE2 has to register with the communication system PBX with the telephone number or code number of the second internal terminal KE4 that is internal to the communication system the activated call forwarding a partial connection between the further terminal and the fictitious connection port FP of the network coupling unit IGATE.
  • a further partial connection is established between a further fictitious connection port RP of the network coupling unit IGATE and the second external terminal KE2 on the basis of the number of the second external terminal KE2 transmitted in the identification data in the communication network KN.
  • the partial connection and the further partial connection are coupled in the module coupling field module BG-KN of the network coupling unit IGATE, as a result of which a terminal connection is established between the second external terminal KE2 and the further terminal.
  • a voice connection is established with the further fictitious connection port RP of the network coupling unit IGATE by entering the 'teleworking' number again.
  • the output unit S-AE of the network coupling unit IGATE After transmission of the identification data via the voice Connection is output by the output unit S-AE of the network coupling unit IGATE a recorded voice message to the second external terminal KE2, which informs the subscriber about possible user actions, such as outputting a voice message stored in the communication system PBX or establishing a terminal connection starting from the second external terminal KE2 with one further terminal device informed.
  • control information corresponding to the key combination in the form of DTMF signals is transmitted via the voice connection to the network coupling unit IGATE, which signals to the communication system PBX that, starting from the fictitious connection port FP of the network coupling unit IGATE, a terminal unit connection is also present another terminal is to be set up.
  • the control unit STE of the communication system PBX then establishes a partial connection between the fictitious connection port FP of the network coupling unit IGATE and the switching network module KN of the communication system PBX by occupying a free user channel of the PCM highway connecting the switching network module KN and the network coupling unit IGATE.
  • the second external terminal KE2 After coupling the voice connection with the partial connection in the module coupling field module BG-KN of the network coupling unit IGATE, the second external terminal KE2 sounds
  • Dial tone The dialing information then entered on the second external terminal KE2 - for example 6833 for the first internal terminal KE3 - is transmitted in the form of DTMF signals to the network coupling unit IGATE via the voice connection and from there to the control unit STE of the communication system PBX tet.
  • the control unit STE of the communication system PBX then sets up a terminal connection between the second external terminal KE2 and the first internal terminal KE3.
  • the subscriber can initiate a connection setup based on the PBX communication system by entering a special 'teleworking' call number .
  • the network coupling unit IGATE recognizes on the basis of the special 'teleworking' call number that a terminal connection is to be set up from the second external terminal KE2 to another terminal and does not accept the call of the second external terminal KE2.
  • a connection is established from the further fictitious connection port RP of the network coupling unit IGATE to the second external terminal KE2 in the communication network KN based on the call number of the second external terminal KE2 automatically transmitted in the context of the ISDN connection, so that for the Participants on the second external terminal KE2 for the terminal connection to be set up with the further terminal are not charged.
  • the control information sent by the second external terminal KE2 during a terminal connection existing between the second external terminal KE2 and a further terminal is transmitted to the network coupling unit IGATE in the form of DTMF signals via the terminal connection.
  • the control information is identified on the network coupling unit IGATE by the DTMF recognition unit DTMF and forwarded to the teleworking computer TW-R.
  • the control data received are converted into terminal-oriented signaling information, for example using a list (not shown).
  • This converted terminal-oriented signaling information is forwarded via the network coupling unit IGATE to the control unit STE of the communication system PBX. Can the control information transmitted by the second external terminal KE2 in the form of DTMF signals from the network coupling unit IGATE are not interpreted, the DTMF signals are forwarded to the other terminal.
  • the further fictitious connection port RP of the network coupling unit IGATE is released by the teleworking computer TW-R and thus stands for a new connection between any terminal registered on the communication system PBX and another Terminal available.
  • the fictitious connection port FP of the network coupling unit IGATE remains assigned to the second external terminal KE2 and is only released after the second external terminal KE2 has been de-registered by the subscriber.
  • the terminal-oriented signaling information to be transmitted from the control unit STE of the communication system PBX to the subscriber is sent to the connection port of the internal terminal assigned to the subscriber - for example to the connection port of the second internal
  • Terminal KE4 with the communication system internal call number 4711 - transmitted.
  • the fictitious connection port FP of the network coupling unit IGATE is assigned to the further external terminal.
  • a maximum of 256 fictitious connection ports can be configured on the IGATE network coupling unit.
  • the network coupling unit IGATE in the form of PCM highways is connected to the switching network module KN of the communication system PBX via 128 user data channels. Since two user channels are required for each terminal connection between a registered terminal and another terminal, a maximum of 64 terminal connections can be established simultaneously via the IGATE network coupling unit. Since with a maximum of 64 terminal connections set up simultaneously, 64 further fictitious connection ports RP Network coupling unit IGATE are occupied by the terminal connections, 191 free fictitious connection ports FP of the network coupling unit IGATE are available for registering terminals with the communication system PBX.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Telephonic Communication Services (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention concerne une unité de couplage (IGATE) à un réseau, se présentant sous la forme d'un module de raccordement d'abonné, dans un système de communication (PBX). Par l'intermédiaire de cette unité de couplage (IGATE), des données peuvent être transmises, au moyen de ce système de communication (PBX), entre des réseaux de différentes typologies (réseau de données, réseau de communication) raccordés à cette unité de couplage (IGATE). Cette dernière présente à cet effet une unité (BW-R) servant à évaluer des informations d'acheminement prélevées dans les données transmises, une unité (VM-R) pour transmettre les données de façon ciblée en fonction des résultats de l'évaluation et une unité (KV-R) pour adapter le format des données.
EP99927690A 1998-04-20 1999-04-20 Unite de couplage a un reseau pour un systeme de communication Withdrawn EP1074155A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19817494 1998-04-20
DE1998117494 DE19817494C2 (de) 1998-04-20 1998-04-20 Netzkopplungseinheit für ein Kommunikationssystem
PCT/DE1999/001185 WO1999055116A2 (fr) 1998-04-20 1999-04-20 Unite de couplage a un reseau pour un systeme de communication

Publications (1)

Publication Number Publication Date
EP1074155A2 true EP1074155A2 (fr) 2001-02-07

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EP99927690A Withdrawn EP1074155A2 (fr) 1998-04-20 1999-04-20 Unite de couplage a un reseau pour un systeme de communication

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EP (1) EP1074155A2 (fr)
CN (1) CN1139267C (fr)
DE (1) DE19817494C2 (fr)
WO (1) WO1999055116A2 (fr)

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Publication number Priority date Publication date Assignee Title
WO2001089231A1 (fr) * 2000-05-15 2001-11-22 Siemens Aktiengesellschaft Dispositif de communication comportant une unite peripherique programmable
DE50209347D1 (de) * 2002-07-23 2007-03-15 Siemens Ag Kommunikationsanlage und integrierte Serverbaugruppe für eine Kommunikationsanlage
DE10259755A1 (de) * 2002-12-19 2004-07-08 Bt Ingnite Gmbh & Co Automatische Terminal- oder Nutzeridentifizierung in Netzwerken

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TW303563B (fr) * 1993-04-26 1997-04-21 At & T Corp
JP2679635B2 (ja) * 1994-08-22 1997-11-19 日本電気株式会社 Ｌａｎ間接続装置
US5764639A (en) * 1995-11-15 1998-06-09 Staples; Leven E. System and method for providing a remote user with a virtual presence to an office
DE19711720C2 (de) * 1997-03-20 2001-05-31 Siemens Ag Kommunikationssystem zum Vermitteln von Datenpaketen zwischen angeschlossenen Kommunikationsendgeräten und/oder Kommunikationsendgeräten von angeschlossenen lokalen Netzen
DE19808368B4 (de) * 1998-02-27 2004-12-09 Siemens Ag Verfahren und Anordnung zum Bereitstellen von Leistungsmerkmalen über ein Kommunikationsnetz

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Title
See references of WO9955116A3 *

Also Published As

Publication number Publication date
DE19817494A1 (de) 1999-10-28
DE19817494C2 (de) 2003-01-30
CN1298609A (zh) 2001-06-06
WO1999055116A2 (fr) 1999-10-28
CN1139267C (zh) 2004-02-18
WO1999055116A3 (fr) 1999-12-16

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