WO2002003741A1 - Method for imaging an s0 interface located on a remote connection - Google Patents

Method for imaging an s0 interface located on a remote connection Download PDF

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Publication number
WO2002003741A1
WO2002003741A1 PCT/EP2001/006989 EP0106989W WO0203741A1 WO 2002003741 A1 WO2002003741 A1 WO 2002003741A1 EP 0106989 W EP0106989 W EP 0106989W WO 0203741 A1 WO0203741 A1 WO 0203741A1
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WIPO (PCT)
Prior art keywords
interface
data
bits
network
module
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PCT/EP2001/006989
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German (de)
French (fr)
Inventor
Steffen Kessler
Mario Max
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Deutsche Telekom Ag
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Publication of WO2002003741A1 publication Critical patent/WO2002003741A1/en

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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
    • H04Q11/045—Selection or connection testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13091—CLI, identification of calling line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13092—Scanning of subscriber lines, monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13109—Initializing, personal profile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13136—Collect call
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1316—Service observation, testing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13166—Fault prevention
    • 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
    • H04Q2213/13202—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
    • H04Q2213/13204—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
    • H04Q2213/13299—Bus

Definitions

  • the invention is intended to give the customer an inexpensive way of being able to check his S 0 interface for a correct connection establishment.
  • connection set-up is transmitted from the customer's network termination (S 0 interface) to a central point in the ISDN network and monitoring for the connection set-up can be carried out there.
  • the functions for transmitting the data are carried out by a module which the customer inserts into his network termination. So then an incoming connection was added and from this moment, the C / I-bits (layer 1) and then the D-bits (layer 2 and layer 3) or Bi or B 2 bits transmitted to a central location.
  • the module works on an ISDN basic connection. As soon as a connection to the service, data transmission 64 kbit / s, is established by the network, the device accepts the connection and sends the D channel data or the status of the C / I bits in the corresponding B channel. In this way, monitoring is carried out by a central body. This allows an error to be identified in the D channel.
  • the billing of the check of an ISDN basic access could be done via a flat rate meter or a service number (e.g. 0180 ... or 0190 ).
  • the customer receives a decision aid in which area the error lies. This enables him to avoid costs because he does not have to blindly hire a service to determine that the error is outside the area of responsibility of the service concerned.
  • the interface implementation (block 1) consists of a PEB 2080, which converts the S 0 interface to an IOM interface. Furthermore, the interface implementation (block 1) consists of a PEB 2080, which converts the S 0 interface to an IOM interface. Furthermore, the interface implementation (block 1) consists of a PEB 2080, which converts the S 0 interface to an IOM interface. Furthermore, the interface implementation (block 1) consists of a PEB 2080, which converts the S 0 interface to an IOM interface. Furthermore, the
  • Block 2 is an ISDN communications controller (ICC).
  • ICC ISDN communications controller
  • the ICC is a PEB 2070 module, via which the entire communication control is handled and which sends the read data. It is controlled or configured by the microcontroller (block 4). The microcontroller controls the
  • Control and configuration by the microcontroller runs according to a predetermined program that is stored in a program memory (block 3).
  • FIG. 2 shows the program flow
  • the program sequence of establishing and closing a connection for the transmission of data to the central point comprises the following steps: After starting the program routine, the ISDN communications controller is initialized to the parameters required for transmitting data in the B channel.
  • a loop now follows, in which a query for received messages (e.g. SETUP etc.) is continuously run in the receive buffer of the ICC. If such a message is received, it is temporarily stored in the microcontroller. Certain information, e.g. B. which channel was occupied (BI or B2) or transmission sequence number and reception sequence number (I frame), saved in variables.
  • the received message is acknowledged with the necessary response. For this purpose, the individual bytes are written into the send buffer of the ICC and then sent out. This happens at the time when the connection is activated.
  • the readout logic is now activated by starting the interrupt control.
  • the flow chart for interrupt control is shown in FIG. 3. From the beginning of a new frame, the microcontroller is interrupted. It now reads the fourth octet of the IOM data frame (D and C / I bits) of the S 0 interface to be monitored via a parallel input. This is done for both the send and the receive direction. This data is cached in MikcrocontroUer and compared with the data from the previous run. First the C / I bits of the transmitting side and then those of the receiving side are compared. If a change can be identified here, the changed data are brought into a specific format and sent to the central point via the B channel.
  • the D bits of the transmitting and receiving side are brought into a defined different format and sent via the B channel.
  • the data format is selected so that one can differentiate between send data and receive data as well as C / I or D bits. The latter is achieved by inserting zero bits and positioning the 4 D bits in the octet of the B channel. During this time, the main program is in the query loop for new ones received
  • the program then controls the disconnection of the data connection up to the end of the program.
  • the module In order to be able to select the module at the So interface, certain information must first be transmitted to the central point (e.g. destination number, description of the fault).
  • the module can also transmit the call number to the customer (at the measuring point).
  • the central point in the network to which the data of the S 0 interface to be measured is transmitted, must enable the data to be converted to the remote So interface in a reverse manner, so that the So interface to be measured is mapped in the central point ,
  • the So interface to be measured can be identical to the So interface via which the module is selected.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Communication Control (AREA)

Abstract

Determining the causes of faults in ISDN connections is a very expensive process, especially as it is only clear from the results whether the network termination or the terminal equipment are affected. The invention enables data from an observed S0 interface to be transmitted to a central position in the network, so that it can be monitored in said central position. The functions of accepting the connection, reading and forming the data (C/I bits or D bits, or B1 or B2 bits), and initialisation, which are required for transmission in the B channel, are carried out by means of a module which is positioned in the S0 interface. The connection between the module and the central position in the ISDN network can be established by the module or, after transmission of the target call number, by the central position. Data is transmitted when the observed S0 interface is imaged onto the central position. A cost-effective monitoring process can thus be carried out in order to determine the causes of faults.

Description

Verfahren zum Abbilden einer So-Schnittstelle an einem entfernten AnschlussMethod for mapping a So interface on a remote connection
Technische Beschreibungtechnical description
Im Bereich ISDN kommt es bei den Kunden immer wieder zum Störungsfall. Die Kunden können nicht überprüfen, ob ihr Problem eher am ISDN- Anschluss oder in der Endeinrichtung zu suchen ist. Da von der Störungsannahme darauf aufmerksam zu machen ist, dass für den Kunden Kosten entstehen, wenn der Fehler im Bereich der Endeinrichtung liegt, wird die Unsicherheit noch verstärkt.In the area of ISDN, customers repeatedly experience a malfunction. Customers cannot check whether their problem is more likely to be found on the ISDN connection or in the terminal equipment. Since it must be pointed out by the fault acceptance that costs arise for the customer if the fault lies in the area of the terminal equipment, the uncertainty is further increased.
Anmerkungen zum Stand der TechnikState of the art comments
Zur Zeit gibt es keine kostengünstige Möglichkeit, einen ISDN- Anschluss auf seine korrekte Verbindungsannahme hin von der Ferne aus zu überprüfen. Natürlich gibt es Messgeräte, mit denen ein ISDN-Basisanschluss überprüft werden kann. Diese Messgeräte sind jedoch nur vor Ort einsetzbar. Außerdem müssen die Geräte eingestellt werden, was bestimmte ISDN-Kenntnisse voraussetzt, über die der Kunde in der Regel nicht verfügt. Wenn der Kunde die Störungsannahme beauftragt, einen Fehler zu suchen, fährt ein Servicetechniker vor Ort und führt eine Fehlerratenmessung durch.There is currently no cost-effective way to remotely check an ISDN connection for correct connection acceptance. Of course there are measuring devices with which an ISDN basic connection can be checked. However, these measuring devices can only be used on site. In addition, the devices must be set, which requires certain ISDN knowledge that the customer usually does not have. If the customer orders the fault acceptance to look for a fault, a service technician drives on site and carries out a fault rate measurement.
Aufgabenstellung und technische LösungTask and technical solution
Mit der Erfindung soll dem Kunden eine kostengünstige Möglichkeit gegeben werden, seine S0-Schnittstelle auf einen korrekten Verbindungsaufbau hin überprüfen zu können.The invention is intended to give the customer an inexpensive way of being able to check his S 0 interface for a correct connection establishment.
Die Aufgabe wird gemäß Anspruch 1 so gelöst, dass die Daten eines Verbindungs- aufbaus vom Netzabschluss des Kunden (S0-Schnittstelle) zu einer zentralen Stelle im ISDN-Netz übermittelt werden und dort ein Monitoring für den Verbindungsaufbau durchgeführt werden kann.The object is achieved according to claim 1 in such a way that the data of a connection set-up is transmitted from the customer's network termination (S 0 interface) to a central point in the ISDN network and monitoring for the connection set-up can be carried out there.
Die Funktionen zur Übermittlung der Daten übernimmt ein Modul, das vom Kunden in seinen Netzabschluss eingesteckt wird. So dann wird eine ankommende Verbindung aufgenommen und ab diesem Moment die C/I-Bits (Schicht 1) und anschließend die D- Bits (Schicht 2 und Schicht 3) bzw. Bi- oder B2-Bits zu einer zentralen Stelle übertragen.The functions for transmitting the data are carried out by a module which the customer inserts into his network termination. So then an incoming connection was added and from this moment, the C / I-bits (layer 1) and then the D-bits (layer 2 and layer 3) or Bi or B 2 bits transmitted to a central location.
Der Kunde könnte sich das Modul z. B. im T-Punkt abholen oder per Post zuschicken lassen.The customer could get the module z. B. pick up at T-Punkt or have it sent to you by post.
Das Modul funktioniert an einem ISDN-Basisanschluss. Sobald eine Verbindung mit dem Dienst, Datenübertragung 64 kbit/s, vom Netz aufgebaut wird, nimmt das Gerät die Verbindung an und sendet in dem entsprechenden B-Kanal die D-Kanal-Daten bzw. den Zustand der C/I-Bits. Auf diese Weise wird von einer zentralen Stelle ein Monitoring durchgeführt. Dadurch lässt sich ein Fehler im D-Kanal erkennen.The module works on an ISDN basic connection. As soon as a connection to the service, data transmission 64 kbit / s, is established by the network, the device accepts the connection and sends the D channel data or the status of the C / I bits in the corresponding B channel. In this way, monitoring is carried out by a central body. This allows an error to be identified in the D channel.
Die Abrechnung der Überprüfung eines ISDN-Basisanschlusses könnte über eine Messgeräte-Pauschale oder eine Servicenummer (z. B. 0180... oder 0190...) erfolgen.The billing of the check of an ISDN basic access could be done via a flat rate meter or a service number (e.g. 0180 ... or 0190 ...).
Vorteile und technische Unterscheidungsmerkmale der Erfindung gegenüber dem Stand der TechnikAdvantages and technical distinguishing features of the invention compared to the prior art
• Kostengünstigere Möglichkeit, einen ISDN-Basisanschluss auf korrekte Funktion hin zu überprüfen. Der Kunde kann kostengünstig und unabhängig den Anschluss auf diesbezügliche Fehler überprüfen.• More cost-effective way to check an ISDN basic connection for correct function. The customer can inexpensively and independently check the connection for errors in this regard.
• Der Kunde erhält eine Entscheidungshilfe, in welchem Bereich der Fehler liegt. Dadurch kann er Kosten vermeiden, weil er nicht blind einen Service beauftragen muss, um festzustellen, dass der Fehler außerhalb des Zuständigkeitsbereiches des entsprechenden Services liegt.• The customer receives a decision aid in which area the error lies. This enables him to avoid costs because he does not have to blindly hire a service to determine that the error is outside the area of responsibility of the service concerned.
• Falls der Fehler im Bereich des Anschlusses liegt, hat der Servicedienst den ersten Einsatz gespart. Beschreibung der Wirkungsweise der Erfindung (Ausführungsbeispiel)• If the fault lies in the area of the connection, the service provider has saved the first use. Description of the mode of operation of the invention (exemplary embodiment)
In Figur 1 ist die Vorrichtung als Blockschaltbild dargestellt.In Figure 1, the device is shown as a block diagram.
Die Schnittstellenumsetzung (Block 1) besteht aus einem PEB 2080, der die S0- Schnittstelle auf eine IOM-Schnittstelle umsetzt. Weiterhin beinhaltet derThe interface implementation (block 1) consists of a PEB 2080, which converts the S 0 interface to an IOM interface. Furthermore, the
Schnittstellenumsetzer alle für den Zugriff auf die So-Schnittstelle notwendigenInterface converter all necessary for access to the So interface
Funktionen (z. B. D-Kanal-Zugriff).Functions (e.g. D-channel access).
Bei dem Block 2 handelt es sich um einen ISDN-Communications-Controller (ICC).Block 2 is an ISDN communications controller (ICC).
Der ICC ist ein Baustein PEB 2070, über den die gesamte Kommunikationssteuerung abgewickelt wird und der die ausgelesenen Daten sendet. Er wird durch den Mikro- controller (Block 4) gesteuert bzw. konfiguriert. Der Mikrocontroller steuert über denThe ICC is a PEB 2070 module, via which the entire communication control is handled and which sends the read data. It is controlled or configured by the microcontroller (block 4). The microcontroller controls the
ICC den Verbindungsauf- und -abbau. Weiterhin wird die Logik zum Auslesen derICC the connection establishment and clearing. Furthermore, the logic for reading the
Daten der zu messenden S0-Schnittstelle (C/I-Bits bzw. D-Bits, Block 5) gesteuert. DieData of the S 0 interface to be measured (C / I bits or D bits, block 5) controlled. The
Steuerung und Konfiguration durch den Mikrocontroller läuft nach einem vorgegebenen Programm ab, dass in einem Programmspeicher (Block 3) abgelegt ist. InControl and configuration by the microcontroller runs according to a predetermined program that is stored in a program memory (block 3). In
Figur 2 ist der Programmablauf dargestellt.Figure 2 shows the program flow.
Der Programmablauf des Verbindungsaufbaus und Verbindungsabbaus für die Übermittlung der Daten zur zentralen Stelle umfasst folgende Schritte: Nach dem Start der Programmroutine wird der ISDN-Communications-Controller auf die zum Übertragen von Daten im B-Kanal notwendigen Parameter initialisiert. Es folgt nun eine Schleife, in der ständig eine Abfrage auf empfangene Nachrichten (z. B. SETUP usw.) im Empfangspuffer des ICC durchlaufen wird. Wird eine derartige Nachricht empfangen, so wird sie im Mikrocontroller zwischengespeichert. Dort werden u. a. bestimmte Informationen, z. B. welcher Kanal wurde belegt (BI oder B2) oder Sendefolgenummer und Empfangsfolgenummer (I-Frame), in Variablen gespeichert. Nach dieser Auswertung wird die empfangene Nachricht mit der notwendigen Anwort quittiert. Dazu werden die einzelnen Bytes in den Sendepuffer des ICC geschrieben und anschließend ausgesendet. Dies geschieht zu dem Zeitpunkt, wenn die Verbindung aktiviert ist. Jetzt wird die Ausleselogik aktiviert, indem die Interruptsteuerung beginnt. Das Ablaufdiagramm für die Interruptsteuerung ist in Figur 3 dargestellt. Der Anfang eines neuen Rahmens sorgt fortan für einen Interrupt des Mikrocontrollers. Er liest nun über einen parallelen Eingang das vierte Oktett des IOM-Datenrahmens (D- und C/I-Bits) der zu überwachenden S0-Schnittstelle aus. Dies geschieht sowohl für die Sende- als auch für die Empfangsrichtung. Diese Daten werden in MikcrocontroUer zwischengespeichert und mit den Daten des vorherigen Durchlaufs verglichen. Zuerst werden hierbei die C/I-Bits der Sendeseite und anschließend jene der Empfangsseite verglichen. Ist hierbei eine Änderung zu erkennen, so werden die geänderten Daten in ein bestimmtes Format gebracht und über den B-Kanal zur zentralen Stelle gesendet. Ist dies jedoch nicht der Fall, so werden die D-Bits der Sende- und Empfangsseite in ein definiertes anderes Format gebracht und über den B-Kanal gesendet. Das Datenformat ist so gewählt, dass man zwischen Sendedaten und Empfangsdaten sowie C/I- oder D- Bits unterscheiden kann. Das letztere wird durch Einfügen von Nullbits und die Positionierung der 4 D-Bits im Oktett des B-Kanals erreicht. Während dieser Zeit befindet sich das Hauptprogramm in der Abfrageschleife auf neue empfangeneThe program sequence of establishing and closing a connection for the transmission of data to the central point comprises the following steps: After starting the program routine, the ISDN communications controller is initialized to the parameters required for transmitting data in the B channel. A loop now follows, in which a query for received messages (e.g. SETUP etc.) is continuously run in the receive buffer of the ICC. If such a message is received, it is temporarily stored in the microcontroller. Certain information, e.g. B. which channel was occupied (BI or B2) or transmission sequence number and reception sequence number (I frame), saved in variables. After this evaluation, the received message is acknowledged with the necessary response. For this purpose, the individual bytes are written into the send buffer of the ICC and then sent out. This happens at the time when the connection is activated. The readout logic is now activated by starting the interrupt control. The flow chart for interrupt control is shown in FIG. 3. From the beginning of a new frame, the microcontroller is interrupted. It now reads the fourth octet of the IOM data frame (D and C / I bits) of the S 0 interface to be monitored via a parallel input. This is done for both the send and the receive direction. This data is cached in MikcrocontroUer and compared with the data from the previous run. First the C / I bits of the transmitting side and then those of the receiving side are compared. If a change can be identified here, the changed data are brought into a specific format and sent to the central point via the B channel. However, if this is not the case, the D bits of the transmitting and receiving side are brought into a defined different format and sent via the B channel. The data format is selected so that one can differentiate between send data and receive data as well as C / I or D bits. The latter is achieved by inserting zero bits and positioning the 4 D bits in the octet of the B channel. During this time, the main program is in the query loop for new ones received
Nachrichten und kann somit einen Verbindungsauslösewunsch erkennen. Ist dies der Fall, so steuert das Programm fortan den Verbindungsabbau der Datenverbindung bis hin zum Ende des Programmes.Messages and can thus recognize a connection trigger request. If this is the case, the program then controls the disconnection of the data connection up to the end of the program.
Um das Modul an der So-Schnittstelle anwählen zu können, müssen vorher bestimmte Informationen an die zentrale Stelle übermittelt werden (z.B. Zielrufnummer, Beschreibung der Störung). Die Übermittlung der Rufnummer kann auch durch das Modul beim Kunden (an der Messstelle) erfolgen.In order to be able to select the module at the So interface, certain information must first be transmitted to the central point (e.g. destination number, description of the fault). The module can also transmit the call number to the customer (at the measuring point).
Die zentrale Stelle im Netz, zu der die Daten der zu messenden S0-Sclιnittstelle übertragen werden, muss die Umsetzung der Daten auf die entfernte So-Schnittstelle in umgekehrter Weise ermöglichen, so dass die zu messende So-Schnittstelle in der zentralen Stelle abgebildet wird. Im Einzelfall kann die zu messende So-Schnittstelle mit der So-Schnittstelle, über die das Modul angewählt wird, identisch sein. The central point in the network, to which the data of the S 0 interface to be measured is transmitted, must enable the data to be converted to the remote So interface in a reverse manner, so that the So interface to be measured is mapped in the central point , In individual cases, the So interface to be measured can be identical to the So interface via which the module is selected.

Claims

Verfahren zum Abbilden einer So-Schnittstelle an einem entfernten AnschlussPatentansprüche (2) Method for mapping a So interface on a remote connection
1. Verfahren zum Abbilden einer So-Schnittstelle an einem entfernten Anschluss, d a d u r c h g e k e n n z e i c h n e t,1. A method for mapping a So interface on a remote connection, ie a d u r c h g e k e n n z e i c h n e t,
- dass die Daten der zu messenden So-Schnittstelle zu einer zentralen Stelle im Netz übermittelt werden, - dass zwischen der So-Schnittstelle und der zentralen Stelle im Netz eine Verbindung aufgebaut wird,- that the data of the So interface to be measured are transmitted to a central location in the network, - that a connection is established between the So interface and the central location in the network,
- dass die Daten C/I-Bits (Schicht 1) bzw. D-Bits (Schicht 2 und 3) oder Bi- bzw. B2- Bits betreffen, die nach Umwandlung der zu messenden So-Schnittstelle in eine IOM-Schnittstelle ausgelesen werden, - dass das Datenformat für die Übermittlung so gewählt ist, dass zwischen C/I-Bits und D-Bits sowie zwischen Sende- und Empfangsrichtung der Messdaten unterschieden werden kann,- That the data relate to C / I bits (layer 1) or D bits (layers 2 and 3) or bi or B 2 bits which are read out after conversion of the So interface to be measured into an IOM interface - that the data format for the transmission is selected so that a distinction can be made between C / I bits and D bits as well as between the send and receive direction of the measurement data,
- dass die Daten von einem Communications-Controller für die Übertragung im Nutzkanal aufbereitet werden, - dass die Bausteine für Schnittstellenumwandlung, Auslesen, Formieren und Senden der Daten in ein Modul eingebracht sind, das mit den Schnittstellen verbunden sein muss,- that the data is processed by a communications controller for transmission in the user channel, - that the modules for interface conversion, reading, forming and sending the data are incorporated in a module that must be connected to the interfaces,
- dass das Modul in der zentralen Stelle im Netz in der Weise eingesetzt wird, dass die Schnittstellenumwandlung rückgängig gemacht wird, so dass ein Abbild von der zu messenden So-Schnittstelle vorliegt, und- that the module is used in the central location in the network in such a way that the interface conversion is undone so that an image of the So interface to be measured is available, and
- dass die in der zentralen Stelle im Netz abgebildete So-Schnittstelle überprüft werden kann. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Verbindung zwischen dem an der So-Schnittstelle eingesteckten Modul und der zentralen Stelle im Netz vom Modul selbst aufgebaut wird oder die zentrale Stelle im Netz das Anwählen vornimmt, nachdem das Modul die Zielrufnummer von der So-Schnittstelle übermittelt hat. - That the So interface shown in the central point in the network can be checked. Method according to claim 1, characterized in that the connection between the module plugged in at the So interface and the central point in the network is established by the module itself or the central point in the network makes the dialing after the module has called the destination number from the So- Interface has transmitted.
PCT/EP2001/006989 2000-07-05 2001-06-21 Method for imaging an s0 interface located on a remote connection WO2002003741A1 (en)

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DE2000133302 DE10033302A1 (en) 2000-07-05 2000-07-05 Method for mapping an SO interface on a remote connection

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