WO1998010599A1 - Service switching function in an intelligent network - Google Patents

Service switching function in an intelligent network Download PDF

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Publication number
WO1998010599A1
WO1998010599A1 PCT/EP1997/004793 EP9704793W WO9810599A1 WO 1998010599 A1 WO1998010599 A1 WO 1998010599A1 EP 9704793 W EP9704793 W EP 9704793W WO 9810599 A1 WO9810599 A1 WO 9810599A1
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WO
WIPO (PCT)
Prior art keywords
service
ssf
network
intelligent network
switching function
Prior art date
Application number
PCT/EP1997/004793
Other languages
German (de)
French (fr)
Inventor
Maximilian Sevcik
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
Priority to EP97919028A priority Critical patent/EP0923838A1/en
Publication of WO1998010599A1 publication Critical patent/WO1998010599A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0029—Provisions for intelligent networking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5614—User Network Interface
    • H04L2012/5616—Terminal equipment, e.g. codecs, synch.
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5625—Operations, administration and maintenance [OAM]
    • H04L2012/5626—Network management, e.g. Intelligent nets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13527—Indexing scheme relating to selecting arrangements in general and for multiplex systems protocols - X.25, TCAP etc.
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13535—Indexing scheme relating to selecting arrangements in general and for multiplex systems distributed systems - also domains in service creation

Definitions

  • Intelligent networks allow participants in
  • Communication networks e.g. ISDN networks
  • value-added services such as toll-free number, virtual private networks (VPN), tele information service etc.
  • VPN virtual private networks
  • tele information service etc.
  • the standard architecture for IN is known and has been comprehensively defined by standardization bodies such as ITU-T, ETSI and Bellcore.
  • FIG. 1 shows the essential IN architecture components in a simplified representation. The functions of the components are now described using an exemplary functional sequence in the IN network:
  • a terminal on the A side starts an outgoing connection to an IN service e.g. by dialing a special service number.
  • the service number is recognized by a service switching function SSF in the A-side exchange.
  • the SSF (Originating) requests further instructions for call handling from a (centralized) Service Control Function SCF in a Service Control Point SCP.
  • a number of standardized signaling protocols such as IN-Application Part Protocol (INAP) or Advanced-IN Protocol (AIN) are used for this. These protocols use the well-known Common Channel Signaling No 7 (CCS7) technology.
  • INAP IN-Application Part Protocol
  • AIN Advanced-IN Protocol
  • CCS7 Common Channel Signaling No 7
  • SSF receives instructions for the call handling of SCF after a corresponding check of the relevant service data.
  • the following instructions serve as instructions:
  • SSF in the A-side switching system establishes a connection to the target switching center on the B-side based on the SCF instruction.
  • a B-sided SSF (terminating) can again request additional instructions from SCF.
  • BSCM Basic Call State Model
  • ITU-T the specification ITU-T
  • Q.1224 the specification ITU-T
  • a BSCM is a machine (finite state machine) that converts the signals of the end devices into the interaction with the SCF and generates or recognizes corresponding network events (e.g. occupied B-side).
  • the SSF functions depend on the network functions, IN services and the SCF protocol. Their implementation in the switching centers is complex, inflexible and has to be adapted each time for new SCF protocols and signaling procedures.
  • the invention is based on the object of specifying an IN architecture which avoids the disadvantages mentioned.
  • FIG 2 shows an IN architecture with an ATM broadband network as the base network (an ATM network as the base network has the advantage that powerful communication interfaces such as ATM-UNI (ATM user network interface) already exist).
  • ATM-UNI ATM user network interface
  • the bsph. IN architecture has the following features:
  • the SSF functions in the terminals exchange messages (e.g. instructions for call handling) with the SCF function directly using suitable ATM protocols, bypassing internal signaling protocols such as e.g. CCS7.
  • suitable standards include industry standards such as To name TCP / IP (over ATM). These protocols are based on known techniques of the Distributed Processing Environment (DPE).
  • DPE Distributed Processing Environment
  • the applications in the end devices exchange messages for service or network control (e.g. establishing a connection to an IN service in the ATM network) directly with the local SSF in the end device via a suitable Application Program Interface (API).
  • API Application Program Interface
  • the IN architecture according to the invention requires terminal devices that are intelligent and have a considerable computing power (this requirement is already met today, at least with PCs, workstations, and servers as terminal devices).
  • the SSF functions are implemented in the end devices and can exchange IN service messages via DPE with the SCF function.
  • the SSF function can be loaded dynamically into the end devices at runtime using the SCF function.
  • Known methods of program and file transfer can be used for this. This enables the SSF to flexibly meet the needs of the ATM Network and IN applications are adapted without affecting the ATM switching systems.
  • the SSF translates the connection control messages received via the API into standardized ones
  • the SSF When an A-side application calls a Virtual Private Network (VPN) service to the B-side, the SSF recognizes a special VP subscriber number in the terminal on the A-side and requests the SCF to translate it into the terminal number of the B-side. The necessary authorizations, etc. are checked in the SCF.
  • the SSF uses the current terminal number received from the SCF as UNI dialing information for establishing a connection in the basic network (e.g. ATM network).
  • the SSF in the terminal on the B side can control special call handling on the incoming calls on the B side.
  • the SSF functions in the A / B terminals implement the Basic Call State Model (BCSM) known from the IN architecture (e.g. ITU-T Q.12xx), but instead of network events (e.g. CCS7, INAP) processes the UNI interface messages and application-specific messages from the end device applications.
  • BCSM Basic Call State Model
  • This offers much greater flexibility (also in the design of the division of functions between SSF and SCF) than in the previous IN architecture. Changes in the SSF application-specific messages and the division of functions between the SSF and SCF have no effect on the ATM switching systems and signaling methods in the ATM broadband network.

Abstract

The known implementation of service switching functions in the switching nodes of an intelligent network is costly and lacks flexibility. In order to avoid these disadvantages, the invention provides for the service switching function to be implemented in terminals connected to the intelligent network.

Description

Beschreibungdescription
DIENSTVERMΠTLUNGSFUNKΉONEN IN EINEM INTELLIGENTEN NETZSERVICE FUNCTIONS IN AN INTELLIGENT NETWORK
Intelligente Netze (IN) erlauben den Teilnehmern inIntelligent networks (IN) allow participants in
Kommunikationsnetzen (z.B. ISDN-Netzen) die Nutzung von Mehrwertdiensten wie gebührenfreie Nummer, Virtual Private Networks (VPN) , Teleinformation Service etc. Die Standardarchitektur für IN ist bekannt und wurde umfassend durch Standardisierungsgremien wie ITU-T, ETSI und Bellcore definiert.Communication networks (e.g. ISDN networks) the use of value-added services such as toll-free number, virtual private networks (VPN), tele information service etc. The standard architecture for IN is known and has been comprehensively defined by standardization bodies such as ITU-T, ETSI and Bellcore.
Figur l zeigt in vereinfachter Darstellung die wesentlichen IN-Architekturkomponenten. Die Funktionen der Komponenten werden nunmehr anhand eines beispielhaften Funktionsablaufs in dem IN-Netz beschrieben:Figure 1 shows the essential IN architecture components in a simplified representation. The functions of the components are now described using an exemplary functional sequence in the IN network:
1) Ein Endgerät auf der A-Seite beginnt eine gehende Verbindung zu einem IN-Dienst z.B. durch Wahl einer besonderen Service-Nummer.1) A terminal on the A side starts an outgoing connection to an IN service e.g. by dialing a special service number.
2) Die Service-Nummer wird durch eine Service Switching Function SSF in der A-seitigen Vermittlungsstelle erkannt.2) The service number is recognized by a service switching function SSF in the A-side exchange.
3) Die SSF (Originating) verlangt weitere Instruktionen zu Rufbehandlung von einer (zentralisierten) Service Control Function SCF in einem Service Control Point SCP. Hierzu wird eine Reihe von standardisierten Signalisierungsprotokollen wie IN-Application-Part-Protocol (INAP) oder Advanced-IN- Protocol (AIN) verwendet. Diese Protokolle nutzen die bekannte Common Channel Signalling No 7 (CCS7) Technologie.3) The SSF (Originating) requests further instructions for call handling from a (centralized) Service Control Function SCF in a Service Control Point SCP. A number of standardized signaling protocols such as IN-Application Part Protocol (INAP) or Advanced-IN Protocol (AIN) are used for this. These protocols use the well-known Common Channel Signaling No 7 (CCS7) technology.
4) SSF erhält die Instruktionen zur Rufbehandlung von SCF nach entsprechender Prüfung der relevanten Dienstdaten. Als Instruktionen dienen z.B:4) SSF receives instructions for the call handling of SCF after a corresponding check of the relevant service data. The following instructions serve as instructions:
- aktuelle Zielrufnummer- current destination number
- Abfrage von Sicherheitsmerkmalen (PIN) - Vergebührungsinformation etc.- Querying security features (PIN) - billing information etc.
5) SSF im A-seitigen Vermittlungssystem baut auf Basis der SCF-Instruktion eine Verbindung zur Ziel-Vermittlungsstelle auf der B-Seite auf. Eine B-seitige SSF (Terminating) kann erneut Zusatzinstruktionen von SCF verlangen.5) SSF in the A-side switching system establishes a connection to the target switching center on the B-side based on the SCF instruction. A B-sided SSF (terminating) can again request additional instructions from SCF.
6) Der Ruf von Endgerät A zu Endgerät B wird durchgeschaltet.6) The call from terminal A to terminal B is switched through.
Die Rufbehandlung in der SSF erfolgt nach einem Basic Call State Modell (BSCM), z.B. gem. der Spezifikation ITU-T, Q.1224. Ein BSCM ist ein Automat (Finite State Machine), welcher die Signale der Endgeräte in die Interaktion mit dem SCF umsetzt und entsprechende Netzereignisse erzeugt, bzw. erkennt (z.B: besetzte B-Seite).Call handling in the SSF is based on a Basic Call State Model (BSCM), e.g. gem. the specification ITU-T, Q.1224. A BSCM is a machine (finite state machine) that converts the signals of the end devices into the interaction with the SCF and generates or recognizes corresponding network events (e.g. occupied B-side).
Die bisherige Architektur hat folgende Nachteile:The previous architecture has the following disadvantages:
Die SSF-Funktionen sind abhängig von den Netzfunktionen, IN- Diensten und vom SCF-Protokoll. Ihre Implementierung in den Vermittlungsstellen ist aufwendig, unflexibel und muß jedesmal für neue SCF-Protokolle und Signalisierverfahren angepasst werden.The SSF functions depend on the network functions, IN services and the SCF protocol. Their implementation in the switching centers is complex, inflexible and has to be adapted each time for new SCF protocols and signaling procedures.
Der Erfindung liegt die Aufgabe zugrunde, eine IN-Architektur anzugeben, die die genannten Nachteile vermeidet.The invention is based on the object of specifying an IN architecture which avoids the disadvantages mentioned.
Diese Aufgabe wird durch eine IN-Architektur gemäß Anspruch 1 gelöst.This object is achieved by an IN architecture according to claim 1.
Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand FIG 2 näher erläuter .An exemplary embodiment of the invention is explained in more detail below with reference to FIG.
FIG 2 zeigt eine IN-Architektur mit einem ATM-Breitban netz als Basis-Netz (Ein ATM-Netz als Basis-Netz hat den Vorteil, daß leistungsfähige Kommunikationsschnittstellen wie z.B. ATM-UNI (ATM-User-Network-Interface) bereits vorhanden sind) .2 shows an IN architecture with an ATM broadband network as the base network (an ATM network as the base network has the advantage that powerful communication interfaces such as ATM-UNI (ATM user network interface) already exist).
Die bsph. IN-Architektur weist folgende Merkmale auf:The bsph. IN architecture has the following features:
1) Die SSF-Funktion wird in den Endgeräten realisiert anstatt in den inflexiblen Vermittlungssystemen.1) The SSF function is implemented in the end devices instead of in the inflexible switching systems.
2) Die SSF-Funktionen in den Endgeräten tauschen Nachrichten (z.B. Instruktionen zur Rufbehandlung) mit der SCF-Funktion direkt über geeignete ATM-Protokolle unter Umgehung von netzinternen Signalisierprotokollen wie z.B. CCS7. Als geeignete Protokolle sind Industriestandards wie z.B. TCP/IP (über ATM) zu nennen. Diese Protokolle beruhen auf bekannten Techniken des Distributed Processing Environment (DPE) .2) The SSF functions in the terminals exchange messages (e.g. instructions for call handling) with the SCF function directly using suitable ATM protocols, bypassing internal signaling protocols such as e.g. CCS7. Suitable standards include industry standards such as To name TCP / IP (over ATM). These protocols are based on known techniques of the Distributed Processing Environment (DPE).
3) Die Anwendungen in den Endgeräten tauschen Nachrichten zur Dienst- bzw. Netz-Steuerung (z.B. Verbindungsaufbau zu einem IN-Dienst im ATM-Netz) direkt mit der lokalen SSF im Endgerät über ein geeignetes Application Program Interface (API) aus.3) The applications in the end devices exchange messages for service or network control (e.g. establishing a connection to an IN service in the ATM network) directly with the local SSF in the end device via a suitable Application Program Interface (API).
Die erfindungsgemäße IN-Architektur setzt Endgeräte vorraus, die intelligent sind und über eine beträchtliche Rechenleistung verfügen (diese Vorraussetzung ist heute zumindest bei PCs, Workstations, und Servern als Endgeräte bereits erfüllt) .The IN architecture according to the invention requires terminal devices that are intelligent and have a considerable computing power (this requirement is already met today, at least with PCs, workstations, and servers as terminal devices).
Im folgenden werden die Eigenschaften der erfindungsgemäßen IN-Architektur näher erläutert:The properties of the IN architecture according to the invention are explained in more detail below:
1) Die SSF-Funktionen werden in den Endgeräten implementiert und können via DPE mit der SCF-Funktion IN-Dienst-Nachrichten austauschen.1) The SSF functions are implemented in the end devices and can exchange IN service messages via DPE with the SCF function.
2) Die SSF-Funktion kann dynamisch zur Laufzeit in die Endgeräte durch die SCF-Funktion geladen werden. Hierzu sind bekannte Methoden des Programm- und Dateitransfers anwendbar. Dadurch kann die SSF flexibel an die Bedürfnisse des ATM- Netzes und IN-Anwendungen angepaßt werden, ohne Einfluß auf die ATM-Vermittlungssysteme.2) The SSF function can be loaded dynamically into the end devices at runtime using the SCF function. Known methods of program and file transfer can be used for this. This enables the SSF to flexibly meet the needs of the ATM Network and IN applications are adapted without affecting the ATM switching systems.
3) Alle Anwendungen in den Endgeräten haben ein einheitliches Application Programm Interface (API) zu SSF für den Austausch von verbindungssteuernden Nachrichten mit dem IN-Dienst. Diese ist unabhängig von der jeweiligen SSF-Funktionalität .3) All applications in the end devices have a uniform application program interface (API) to SSF for the exchange of connection-controlling messages with the IN service. This is independent of the respective SSF functionality.
4) Die SSF übersetzt die über das API empfangenen verbindungssteuernden Nachrichten in standardisierte4) The SSF translates the connection control messages received via the API into standardized ones
Signalisierungsnachrichten an der UNI-Schnittstelle gemäß den geltenden ITU-T oder ATM-Forum Standards (z.B. Q.2931, UNI 3.1 etc.) . Hierzu werden (transparent für die Anwendungen) via die DPE-Kommunikationsprotokolle zusätzliche Instruktionen aus der zentralisierten SCF geholt.Signaling messages on the UNI interface in accordance with the applicable ITU-T or ATM Forum standards (e.g. Q.2931, UNI 3.1 etc.). For this purpose (transparent to the applications) additional instructions are fetched from the centralized SCF via the DPE communication protocols.
Beispiel :For example:
Wenn eine A-seitige Anwendung einen Virtual Private Network (VPN) -Dienst zur B-Seite aufruft, erkennt die SSF im Endgerät auf der A-Seite eine spezielle VP -Teilnehmernummer und verlangt vom SCF eine Übersetzung in die Endgerätenummer der B-Seite. Dabei werden in der SCF die notwendigen Prüfungen der Berechtigungen usw. durchgeführt. Die von der SCF erhaltene aktuelle Endgerätenummer der B-Seite wird vom SSF als UNI Wahlinformation zum Verbindungsaufbau im Basis-Netz (z. B. ATM-Netz) eingesetzt. Analog kann die SSF im Endgerät der B-Seite eine besondere Rufbehandlung auf der ankommenden Rufe auf der B-Seite steuern.When an A-side application calls a Virtual Private Network (VPN) service to the B-side, the SSF recognizes a special VP subscriber number in the terminal on the A-side and requests the SCF to translate it into the terminal number of the B-side. The necessary authorizations, etc. are checked in the SCF. The SSF uses the current terminal number received from the SCF as UNI dialing information for establishing a connection in the basic network (e.g. ATM network). Similarly, the SSF in the terminal on the B side can control special call handling on the incoming calls on the B side.
5) Die SSF-Funktionen in den A-/B-Endgeräten realisieren den aus der IN-Architektur (z.B. ITU-T Q.12xx) bekannten Basic Call State Model (BCSM) , allerdings werden anstatt von Netzereignissen (z B. CCS7, INAP) die UNI- Schnittstellenmeldungen und anwendungsspezifischen Meldungen der Endgeräte-Anwendungen verarbeitet. Dies bietet eine viel größere Flexibilität (auch in der Gestaltung der Funktionsaufteilung zwischen SSF und SCF) als in der bisherigen IN-Architektur. Änderungen in den SSF anwendungsspezifischen Meldungen und der Funktionsaufteilung zwischen SSF und SCF haben keine Auswirkung auf die ATM- VermittlungsSysteme und Signalisierungsverfahren im ATM- Breitbandnetz. 5) The SSF functions in the A / B terminals implement the Basic Call State Model (BCSM) known from the IN architecture (e.g. ITU-T Q.12xx), but instead of network events (e.g. CCS7, INAP) processes the UNI interface messages and application-specific messages from the end device applications. This offers much greater flexibility (also in the design of the division of functions between SSF and SCF) than in the previous IN architecture. Changes in the SSF application-specific messages and the division of functions between the SSF and SCF have no effect on the ATM switching systems and signaling methods in the ATM broadband network.

Claims

Patentansprüche claims
1. Intelligentes Netz, mit a) einer Service Control Function (SCF) , die die Behandlung eines Dienstes des Intelligenten Netzes (IN) netzzentral steuert, b) einer Service Switching Function (SSF) , die von der Service Control Function (SCF) empfangene Anweisungen zur Behandlung eines IN-Dienstes ausführt, dadurch gekennzeichnet, daß c) die Service Switching Function (SSF) in den an das Intelligente Netz angeschlossenen Endgeräten realisiert ist.1. Intelligent network, with a) a service control function (SCF) that controls the handling of a service of the intelligent network (IN) centrally, b) a service switching function (SSF) that is received by the service control function (SCF) Executes instructions for handling an IN service, characterized in that c) the service switching function (SSF) is implemented in the terminals connected to the intelligent network.
2. Intelligentes Netz nach Anspruch 1 dadurch gekennzeichnet, daß dem Intelligenten Netz als Basisnetz ein ATM-Netz zugrunde liegt, und daß die Service Switching Function (SSF) mit der Service Control Function (SCF) IN-Nachrichten über ein Kommunikationsprotokoll austauscht, das auf der Technik des Distributed Processing Environment (DPE) beruht und auf dem ATM-Signalisierungsprotokoll aufbaut .2. Intelligent network according to claim 1, characterized in that the intelligent network as the base network is based on an ATM network, and that the service switching function (SSF) with the service control function (SCF) exchanges IN messages via a communication protocol which is based on the technology of the distributed processing environment (DPE) and is based on the ATM signaling protocol.
3. Endgerät eines Intelligenten Netzes, mit a) einer Anwendung, die einen IN-Dienst durch entsprechende IN-Nachrichten steuert, b) einer Service Switching Function (SSF) , die die genannten IN-Nachrichten empfängt und in Signalisierungsnachrichten an das dem Intelligenten Netz zugrunde liegende Basis-Netz übersetzt, wobei sie hierzu Nachrichten mit einer netzzentralen Service Control Function (SCF) austauscht,3. Terminal of an intelligent network, with a) an application that controls an IN service through corresponding IN messages, b) a service switching function (SSF) that receives the IN messages mentioned and in signaling messages to the intelligent network the underlying basic network is translated, for this purpose it exchanges messages with a network-central Service Control Function (SCF),
4. Endgerät nach Anspruch 3 , dadurch gekennzeichnet, daß die Service Switching Function (SSF) die genannten IN- Nachrichten in direkter Weise von der IN-Anwendung empfängt. 4. Terminal according to claim 3, characterized in that the service switching function (SSF) receives said IN messages in a direct manner from the IN application.
5. Endgerät nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Service Switching Function (SSF) dynamisch, d.h. zur Laufzeit , in das Endgerät geladen werden kann.5. Terminal according to claim 3 or 4, characterized in that the service switching function (SSF) dynamic, i.e. at runtime, can be loaded into the device.
6. Endgerät nach einem der Ansprüche 3 bis' 5 , dadurch gekennzeichnet, daß die Service Switching Function (SSF) zum Nachrichtenaustausch mit der Service Control Function (SCF) ein vom Basis-Netz unabhängiges Kommunikationsprotokoll (DPE) verwendet.6. Terminal according to one of claims 3 to '5, characterized in that the service switching function (SSF) for message exchange with the service control function (SCF) uses a communication protocol independent of the base network (DPE).
7. Endgerät nach einem der Ansprüche 3 bis 6, gekennzeichne durch ein Application Programming Interface (API) , das eine einheitliche horizontale Schnittstelle für den Austausch von IN-Nachrichten zwischen Anwendung und IN-Dienst bildet, und das von der Funktionalität der Service Switching Function (SSF) gegenüber dem Intelligenten Netz unabhängig ist. 7. Terminal according to one of claims 3 to 6, marked by an application programming interface (API), which forms a uniform horizontal interface for the exchange of IN messages between application and IN service, and that of the functionality of the service switching function (SSF) is independent of the intelligent network.
PCT/EP1997/004793 1996-09-04 1997-09-03 Service switching function in an intelligent network WO1998010599A1 (en)

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EP96114171.0 1996-09-04

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995008881A1 (en) * 1993-09-23 1995-03-30 Bell Communications Research, Inc. Broadband intelligent telecommunications network and method providing enhanced capabilities for customer premises equipment
EP0693859A2 (en) * 1994-07-19 1996-01-24 AT&T Corp. Completion of intelligent network telephone calls

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995008881A1 (en) * 1993-09-23 1995-03-30 Bell Communications Research, Inc. Broadband intelligent telecommunications network and method providing enhanced capabilities for customer premises equipment
EP0693859A2 (en) * 1994-07-19 1996-01-24 AT&T Corp. Completion of intelligent network telephone calls

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KAWARASAKI ET AL.: "Perspective of an ATM platform", NTT REVIEW, vol. 6, no. 1, January 1994 (1994-01-01), TOKYO JP, pages 38 - 42, XP000425222 *
SAMSON ET AL.: "Optimal SSP locations in an Intelligent Network", XV INTERNATIONAL SWITCHING SYMPOSIUM, vol. 2, 23 April 1995 (1995-04-23) - 28 April 1995 (1995-04-28), BERLIN DE, pages 335 - 339, XP000495678 *

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CN1229560A (en) 1999-09-22

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