{"title":"ISPBX evolution towards standard ISDN","authors":"G. Havermans, J. Maat, R.T. van der Schaaf","doi":"10.1109/ISS.1990.768711","DOIUrl":"https://doi.org/10.1109/ISS.1990.768711","url":null,"abstract":"","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127479550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paperpresents the architecture of an ATM switching unit for broadband networks. Fundamental architectural requirements are considered and system solution is described to be used for early applications in field trials. The different entities of the network are explained in detail in addition to the mechanism which allow the implementation of the architecture to provide the features of future ATM networks and meet the requirements of National ATMprograms. 1.INlRODUCllON This paper describes the architecture of an ATM switching unit, taking the local exchange as an example. It proposes a set of subsystems to be used as building blocks during the definition of a specific configuration. The proposed system solution is limited in size and is intended for early field trials and National programs. 2. OVERALL ARCHITECTURE DESCRIPTlON AND CONCEPTS During the fmt introduction of broadband services in an ATM switching environment, the ATM switches will be required to: to increase the capacity of interconnected MAN networks. to provide switched broadband services (e.g. videotelephony, individual videoconferencing, high quality image retrieval, distribution services, ...). The proposed ATM architecture takes into account the fact that broadband service demand will be scattered over the country on a low density basis. The important components of such a network are: ATM Subscriber concentrators with a capacity of up to 150 subscribers. Concentration is done on a call per call basis onto a small number of highly loaded links to the ATM switching unit (see later). An ATM switching unit supporting about 3000 subscriirs. They perform the call processing functions for the broadband services. Subscriber concentrators can be local or remote to the ATh4 switching unit. When remote, they are linked to the ASU with standard transmission equipment. ?b offer N-ISDN services and interworking with N-ISDN, each broadband exchange is connected to an E10612 local exchange which is in charge of the N-ISDN call handling. When no E10/S12 exchange is available, transparent 2Mb/s1.5Mb/s channels can be made available between the customer narrowband equipment and the NE3 local exchange through the broadband exchange. The presented architecture has been designed taking into account the specific properties of broadband services such as: multiple service components (e.g. image, voice) point to point, point to multipoint variable bitrate source coding various qualities of service The resulting architecture of the ATM switching unit is based on: the clear separation of functions either belonging to the network transport or the network control functions. These functions are grouped in the so-called "transport network (TN) " and in the "control network (CN) ". The main characteristic of such a separation is the concept of services delivered by one type of network to the other. These services are the only interaction defied between both network types. This concept allows a separate evolut
{"title":"An ATM switching unit architecture for BISDN","authors":"J.P. Glon, P. Debuysscher, J. Paul","doi":"10.1109/ISS.1990.770097","DOIUrl":"https://doi.org/10.1109/ISS.1990.770097","url":null,"abstract":"The paperpresents the architecture of an ATM switching unit for broadband networks. Fundamental architectural requirements are considered and system solution is described to be used for early applications in field trials. The different entities of the network are explained in detail in addition to the mechanism which allow the implementation of the architecture to provide the features of future ATM networks and meet the requirements of National ATMprograms. 1.INlRODUCllON This paper describes the architecture of an ATM switching unit, taking the local exchange as an example. It proposes a set of subsystems to be used as building blocks during the definition of a specific configuration. The proposed system solution is limited in size and is intended for early field trials and National programs. 2. OVERALL ARCHITECTURE DESCRIPTlON AND CONCEPTS During the fmt introduction of broadband services in an ATM switching environment, the ATM switches will be required to: to increase the capacity of interconnected MAN networks. to provide switched broadband services (e.g. videotelephony, individual videoconferencing, high quality image retrieval, distribution services, ...). The proposed ATM architecture takes into account the fact that broadband service demand will be scattered over the country on a low density basis. The important components of such a network are: ATM Subscriber concentrators with a capacity of up to 150 subscribers. Concentration is done on a call per call basis onto a small number of highly loaded links to the ATM switching unit (see later). An ATM switching unit supporting about 3000 subscriirs. They perform the call processing functions for the broadband services. Subscriber concentrators can be local or remote to the ATh4 switching unit. When remote, they are linked to the ASU with standard transmission equipment. ?b offer N-ISDN services and interworking with N-ISDN, each broadband exchange is connected to an E10612 local exchange which is in charge of the N-ISDN call handling. When no E10/S12 exchange is available, transparent 2Mb/s1.5Mb/s channels can be made available between the customer narrowband equipment and the NE3 local exchange through the broadband exchange. The presented architecture has been designed taking into account the specific properties of broadband services such as: multiple service components (e.g. image, voice) point to point, point to multipoint variable bitrate source coding various qualities of service The resulting architecture of the ATM switching unit is based on: the clear separation of functions either belonging to the network transport or the network control functions. These functions are grouped in the so-called \"transport network (TN) \" and in the \"control network (CN) \". The main characteristic of such a separation is the concept of services delivered by one type of network to the other. These services are the only interaction defied between both network types. This concept allows a separate evolut","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131525611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The current telecom network development with new services, new technologies, deregulation, etc., is evolving towards a more and more complex network with intricate traffic routing principles. With complexity follows increasing network handling costs. The ideal metropolitan network structure is strongly dependent on these increasing handling costs, and the application of new technologies. A number of network studies, where investments and handling costs are considered simultaneously, have been performed and arepresented in this paper. As a result of our analysis we propose the following ideal network structure: For the switched traffic, only tandem routing should be applied, ie, no direct routes between local exchanges. All switched trafflc is carried through tandem exchanges. For an effective handling of the transport resources, in particular non switched circuits, digital crossconnect systems are utilized. We also recommend a gradual change of the existing alternative routing strategy with direct routes, towards a true hub network architecture, applying tandem routing.
{"title":"Impact of new technologies and network handling costs on the Metropolitan network structure","authors":"I. Andersson, K. Falk-Skogh, A. Rudberg, T. Thun","doi":"10.1109/ISS.1990.770128","DOIUrl":"https://doi.org/10.1109/ISS.1990.770128","url":null,"abstract":"The current telecom network development with new services, new technologies, deregulation, etc., is evolving towards a more and more complex network with intricate traffic routing principles. With complexity follows increasing network handling costs. The ideal metropolitan network structure is strongly dependent on these increasing handling costs, and the application of new technologies. A number of network studies, where investments and handling costs are considered simultaneously, have been performed and arepresented in this paper. As a result of our analysis we propose the following ideal network structure: For the switched traffic, only tandem routing should be applied, ie, no direct routes between local exchanges. All switched trafflc is carried through tandem exchanges. For an effective handling of the transport resources, in particular non switched circuits, digital crossconnect systems are utilized. We also recommend a gradual change of the existing alternative routing strategy with direct routes, towards a true hub network architecture, applying tandem routing.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122444484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Today's marketplace is replete with niche services like Electronic Data Interchange (EDI) and Electronic Mail. Likewise, many technologies with promise have been introduced such os far and optical storage. For these disparate technologies and applications to be succeqhl, a workable solution for solving business needs is required This paper will describe a wideband service application based on the public nehvork, enabled by today's end user needs and txhnologies. mering the service in today's environment presents the opportuniq to learn first-hand the network and servict attributes likely to be required by the public network of the 1990s.
{"title":"Wideband multimedia transaction services over the public network","authors":"A.E. Ghidali, L.E. Rohrbach, C. Till","doi":"10.1109/ISS.1990.768703","DOIUrl":"https://doi.org/10.1109/ISS.1990.768703","url":null,"abstract":"Today's marketplace is replete with niche services like Electronic Data Interchange (EDI) and Electronic Mail. Likewise, many technologies with promise have been introduced such os far and optical storage. For these disparate technologies and applications to be succeqhl, a workable solution for solving business needs is required This paper will describe a wideband service application based on the public nehvork, enabled by today's end user needs and txhnologies. mering the service in today's environment presents the opportuniq to learn first-hand the network and servict attributes likely to be required by the public network of the 1990s.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123548419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Since divestiture from AT&T in 1984, sustaining high quality software and services is a major challenge for the former Bell companies. In total these companies now spend over one billion dollars on software purchases annually. Increasing software control ofthe telecommunications network contributes greatly to the high level of software procurement. Poor software qualify could adversely affect not only operations, cost and revenue, but the very effectiveness of the services provided to the public. In 1984, Bellcore Software Quality Assurance Engineering (SQAE) was established to help Bellcore Client Companies (BCCs) ensure that the software they purchase conforms to their requirements. This paper presents the Bellcore SQAE approach particularly the software surveillance program. The specific components of surveillance are analysis of the vendor's quality program; quality measurements; using measurement results to control and improve production; and field site visits to ensure ongoing quality. Several surveillance tools are described, including QualityProgram Specifications, Software Quality Measurements, Reliability and QualityAcceptance Criteria, and fault Density Measurements. The ultimate goal of the Bellcore program is to develop a cooperative relationship between the buyer's software survellance program and the supplier's own quality program. Partnership enhances the supplier's motivation toward continuous improvement thereby increasing the level of quality that customers can expect.
{"title":"Software surveillance: a buyer quality assurance program","authors":"J. Pence, S. E. Hon","doi":"10.1109/ISS.1990.770110","DOIUrl":"https://doi.org/10.1109/ISS.1990.770110","url":null,"abstract":"Since divestiture from AT&T in 1984, sustaining high quality software and services is a major challenge for the former Bell companies. In total these companies now spend over one billion dollars on software purchases annually. Increasing software control ofthe telecommunications network contributes greatly to the high level of software procurement. Poor software qualify could adversely affect not only operations, cost and revenue, but the very effectiveness of the services provided to the public. In 1984, Bellcore Software Quality Assurance Engineering (SQAE) was established to help Bellcore Client Companies (BCCs) ensure that the software they purchase conforms to their requirements. This paper presents the Bellcore SQAE approach particularly the software surveillance program. The specific components of surveillance are analysis of the vendor's quality program; quality measurements; using measurement results to control and improve production; and field site visits to ensure ongoing quality. Several surveillance tools are described, including QualityProgram Specifications, Software Quality Measurements, Reliability and QualityAcceptance Criteria, and fault Density Measurements. The ultimate goal of the Bellcore program is to develop a cooperative relationship between the buyer's software survellance program and the supplier's own quality program. Partnership enhances the supplier's motivation toward continuous improvement thereby increasing the level of quality that customers can expect.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114269386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The location of the packet buffers is one of the primary elements characterizing the direrent proposals of broadband packet switch architectures. Input queueing, internal queueing and output queueing switches can be considered the basic switch architectures. Euch of these clarses has difSerent advantages and drawbacks. Adopting in the same switch two diyerent queueing techniques with a suitable hardware design can provide substantial performance improvements. Nevertheless, congestion control procedures can become more complex, as packet loss in a switch can in principle originate in two direrent places, not one. We describe here a broadbandpacket switch using a Batcher-banyan interconnection network with input and output queueing that b able to t r a d e r more than one packet per slot to a given switch outlet. A probe-ack contention resolution mechanism is adopted to select the confict-pee paths for the packets to be transferred through the interconnection network Owing to thisscheme buffer overfow at the output ports is prevented
{"title":"A broadband packet switch with input and output queueing","authors":"A. Pattavina","doi":"10.1109/ISS.1990.768700","DOIUrl":"https://doi.org/10.1109/ISS.1990.768700","url":null,"abstract":"The location of the packet buffers is one of the primary elements characterizing the direrent proposals of broadband packet switch architectures. Input queueing, internal queueing and output queueing switches can be considered the basic switch architectures. Euch of these clarses has difSerent advantages and drawbacks. Adopting in the same switch two diyerent queueing techniques with a suitable hardware design can provide substantial performance improvements. Nevertheless, congestion control procedures can become more complex, as packet loss in a switch can in principle originate in two direrent places, not one. We describe here a broadbandpacket switch using a Batcher-banyan interconnection network with input and output queueing that b able to t r a d e r more than one packet per slot to a given switch outlet. A probe-ack contention resolution mechanism is adopted to select the confict-pee paths for the packets to be transferred through the interconnection network Owing to thisscheme buffer overfow at the output ports is prevented","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125556733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As the telecommunication networks grow more complex and difficult to manage, transport network elements such as digital cross-connect systems and SDH based products can provide attractive network solutions. The prime target for these systems is to provide more efficient network solutions in terms of cost, operations and maintainability. This paper considers digital cross-connect systems in their near time application areas such as leased lines and data networks, network administration and service provisioning, network redundancy and maintenance. Also cost comparisons to conventional approaches are made. For example, a digital cross-connect system solution for network protection switching reduces the needfor network spare capacity by a factor of 3 as compared to regular 1:1 protection switches. Replacing back-to-back multiplexer arrangements with DCCs also leads to substantial cost savings in the order of 10-50 %. Apart from viewing the network topics, this paper also presents some aspects of DCC implementation.
{"title":"Digital cross-connect systems - a tool for managing the transport network","authors":"J. Andersson, S. Improta, G. Evangellsti","doi":"10.1109/ISS.1990.770130","DOIUrl":"https://doi.org/10.1109/ISS.1990.770130","url":null,"abstract":"As the telecommunication networks grow more complex and difficult to manage, transport network elements such as digital cross-connect systems and SDH based products can provide attractive network solutions. The prime target for these systems is to provide more efficient network solutions in terms of cost, operations and maintainability. This paper considers digital cross-connect systems in their near time application areas such as leased lines and data networks, network administration and service provisioning, network redundancy and maintenance. Also cost comparisons to conventional approaches are made. For example, a digital cross-connect system solution for network protection switching reduces the needfor network spare capacity by a factor of 3 as compared to regular 1:1 protection switches. Replacing back-to-back multiplexer arrangements with DCCs also leads to substantial cost savings in the order of 10-50 %. Apart from viewing the network topics, this paper also presents some aspects of DCC implementation.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130579816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As the ATM technique matures several solutions have been proposed for the integration of video codecs in the broadband ISDN. At present, two approaches can be distinguished The first aims at the integration of video codecs, that were developedfor synchronous networks, in the ATM network For these codecs, adoptors are developed that provide the necessary circuit emulation over the ATM network, with the required quality. In the paper special attention is paid to synchronization, dejittering and cell loss protection issues. The second scenario is bared on a new generation of video codecs that a n being developed especially for the ATM network These codecs take full advantage of the flexibility offered by the ATM network, and allow cell loss concealment techniques to be used. In the paper Variable Bit Rate video coding and the associated bandwidrh allocation and policing algorithms are discussed. Special features such as user selectable picture quality are shown Cell loss detection and concealment techniques are discussed.
{"title":"Integrating video codecs in ATM networks","authors":"B. Voeten, W. Verbiest, J. David","doi":"10.1109/ISS.1990.768702","DOIUrl":"https://doi.org/10.1109/ISS.1990.768702","url":null,"abstract":"As the ATM technique matures several solutions have been proposed for the integration of video codecs in the broadband ISDN. At present, two approaches can be distinguished The first aims at the integration of video codecs, that were developedfor synchronous networks, in the ATM network For these codecs, adoptors are developed that provide the necessary circuit emulation over the ATM network, with the required quality. In the paper special attention is paid to synchronization, dejittering and cell loss protection issues. The second scenario is bared on a new generation of video codecs that a n being developed especially for the ATM network These codecs take full advantage of the flexibility offered by the ATM network, and allow cell loss concealment techniques to be used. In the paper Variable Bit Rate video coding and the associated bandwidrh allocation and policing algorithms are discussed. Special features such as user selectable picture quality are shown Cell loss detection and concealment techniques are discussed.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134317962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The management of modern telecommunication networks is a complex and labour-intensive task which requires the assimilation of vast amounts of information and the application of operators' judgement and expertise. Emerging computing and communication technologies enable the development of advanced tools which help operators manage their networks more effectively and economically. However, for these tools to be effective, they must be integrated in the users environments, and must meet the stringent operating requirements of robustness, real-time performance, and adaptability to the individual site and operators needs. The paper summarizes our design experience and trial results over the last several years of developing increasingly sophisticated network management tools. Next, we present an analysis of the requirements for successful introduction of these tools into network operations which is based on exploiting the synergies of multiple technologies, the functional and architectural integra- tion of the tools within the users environments, and the adherence to a software life cycle model which ensures the quality and evolution of the developed tools. Finally, the paper presents a detailed case study which shows the successful application of the above principles to the development of advanced surveillance tools for the DPN packet switching networks.
{"title":"Intelugent tools for network management","authors":"S. Rabie","doi":"10.1109/ISS.1990.768720","DOIUrl":"https://doi.org/10.1109/ISS.1990.768720","url":null,"abstract":"The management of modern telecommunication networks is a complex and labour-intensive task which requires the assimilation of vast amounts of information and the application of operators' judgement and expertise. Emerging computing and communication technologies enable the development of advanced tools which help operators manage their networks more effectively and economically. However, for these tools to be effective, they must be integrated in the users environments, and must meet the stringent operating requirements of robustness, real-time performance, and adaptability to the individual site and operators needs. The paper summarizes our design experience and trial results over the last several years of developing increasingly sophisticated network management tools. Next, we present an analysis of the requirements for successful introduction of these tools into network operations which is based on exploiting the synergies of multiple technologies, the functional and architectural integra- tion of the tools within the users environments, and the adherence to a software life cycle model which ensures the quality and evolution of the developed tools. Finally, the paper presents a detailed case study which shows the successful application of the above principles to the development of advanced surveillance tools for the DPN packet switching networks.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"409 23","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114003781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rapidly growing needs for communication between private installations can be eWected for the next couple of years. This communication includes a wide variety of voice, data and video traffic. The service birrates required are between a few Bit and the order of hundred Mbit per second. Interworking with the existing subscriber premises equipment is mandatory, and interworking with the public exchange is desirable. Most of the connections should be semi-permanent, but there is also a demand for dialled connections, especially for broadband services, which will be pre-standard and provisional in the next few years due to the lack of interface and signalling standards. In this paper the requirements for an ATM Interconnect Network are derived followed by descriptions of the proposed interfaces and services and the functional system architecture, in which a Metropolitan Area Network (MAN) according to IEEE standard 802.6 is combined with an ATM network Some deeper view is given on the interconnection of Local Area Networks (LANs), which is seen as the most urgent requirement.
{"title":"Strategy for an ATM interconnect network","authors":"E. Matthias, G. Gastaud","doi":"10.1109/ISS.1990.770103","DOIUrl":"https://doi.org/10.1109/ISS.1990.770103","url":null,"abstract":"Rapidly growing needs for communication between private installations can be eWected for the next couple of years. This communication includes a wide variety of voice, data and video traffic. The service birrates required are between a few Bit and the order of hundred Mbit per second. Interworking with the existing subscriber premises equipment is mandatory, and interworking with the public exchange is desirable. Most of the connections should be semi-permanent, but there is also a demand for dialled connections, especially for broadband services, which will be pre-standard and provisional in the next few years due to the lack of interface and signalling standards. In this paper the requirements for an ATM Interconnect Network are derived followed by descriptions of the proposed interfaces and services and the functional system architecture, in which a Metropolitan Area Network (MAN) according to IEEE standard 802.6 is combined with an ATM network Some deeper view is given on the interconnection of Local Area Networks (LANs), which is seen as the most urgent requirement.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115311351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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