ISSLS 88., International Symposium on Subscriber Loops and Services

11-16 Sept. 1988

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  • ISSLS 88: The International Symposium on Subscriber Loops and Services. Proceedings (Cat. No.88CH2536-1)

    Publication Year: 1988
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    Freely Available from IEEE
  • Evaluation of the ISDN market in France

    Publication Year: 1988, Page(s):66 - 69
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The authors present the commercial strategy for introducing ISDN in France. This strategy is based on the favorable technical elements of the French network, and on the past experience of Videotex and Transpac. Market studies appear to be helpful in determining this strategy. This strategy consists of four actions: reducing the cost of terminals; having attractive tariffs; creating a special sales... View full abstract»

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  • Optimizing fiber planning in the loop

    Publication Year: 1988, Page(s):156 - 160
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    Planning for fiber-optic systems in the loop to optimize allocation of facilities is discussed. A novel equipment model describes electronic system configurations at fiber sites in the loop so that they can be used for bit-rate optimization. An economical fiber planning module provides new functionality to planners, including automated selection of fiber terminating multiplexer bit rate and dynami... View full abstract»

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  • ISDN, initial results: lessons for tomorrow

    Publication Year: 1988, Page(s):202 - 207
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    ISDN opened in France at the end of 1987 with the connection of some fifty professionals and businesses. The service is being extended rapidly. The authors give the results that have been obtained from this operation in its development phase as well as the first months of operation. They focus on the main successes and/or problems that will define the extension and development of ISDN in the comin... View full abstract»

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  • An optimal investment strategy model for fiber to the home

    Publication Year: 1988, Page(s):149 - 155
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    A modeling approach is demonstrated for selecting an optimal investment strategy, over time, for deploying optical fiber in the local loop. The analysis proceeds in three steps. First, the authors forecast cost trends for the key components of a residential fiber network over a 20-year time horizon. Second, an engineering planning model calculates the total cost of providing broadband services usi... View full abstract»

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  • Blown fibre experience in the local loop

    Publication Year: 1988, Page(s):197 - 201
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    British Telecom is embarking on an installation program to install fiber for its major business customers. In support of this activity, blown fiber has been introduced as a radically new way of installing optical fibers into the local loop. Blown fiber is a technique for installing optical fiber by blowing with compressed air into a preinstalled network of small-bore tubing. A brief review of sing... View full abstract»

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  • The evolution from narrowband to broadband customer access

    Publication Year: 1988, Page(s):144 - 148
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    The author uses a simple model of customer access to gain insight into long-term architecture. He then argues from the nature of concentrating devices that the customer access network (the network dimensioned for individual customers) will eventually shrink to a very much shorter arrangement than at present. The author considers several transitional arrangements toward the long term and suggests t... View full abstract»

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  • Project ADMIRAL-the management of services on an internet

    Publication Year: 1988, Page(s):267 - 270
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Project ADMIRAL was a collaborative project to investigate techniques for networking computer systems that may be distributed across a large organization. An extensive infrastructure was created and used to assemble a series of demonstrators. The author discusses one of the topics addressed by the project: the management of services on an internet that comprises a number of separate administrative... View full abstract»

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  • Design aspects and field trial results of a subscriber loop transceiver for the ISDN basic access

    Publication Year: 1988, Page(s):52 - 56
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    The authors deal with activities and developments carried out in Italy concerning the subscriber loop transceiver and transmission system structure for the ISDN basic access. The ECBM (echo canceller burst model) transceiver is implemented (in the present introductory solution) by a dual-chip version: an analog section and a digital one. The analog section is implemented by a full custom technique... View full abstract»

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  • Architecture and technology for the all-fiber loop

    Publication Year: 1988, Page(s):190 - 196
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Digital loop carrier systems were designed as a replacement for the copper feeder pairs. The distribution portion of the loop remained unchanged. The copper Tl lines required for these systems were replaced with fiber multiplexer systems that provided inexpensive high-capacity feeder routes. Fiber feeder systems allowed a local exchange company (LEC) to increase the capacity by changing the electr... View full abstract»

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  • Upgrading strategy generalization for b-ISDN fiber-optic subscriber loop systems

    Publication Year: 1988, Page(s):138 - 143
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    Strategies for developing broadband subscriber loops economically are investigated. Proposed strategies aim at a practical implementation of fiber-optic subscriber loops. System implementation cost is reduced by restricted use of expensive optical components. The system can be upgraded in accordance with the trends of optical component cost reduction. An optimum upgrading strategy is selected with... View full abstract»

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  • Mechanizing the customer access to network trouble reporting operations

    Publication Year: 1988, Page(s):262 - 266
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    A mechanized process is proposed for providing customers with direct telephone access to network trouble-reporting operations. The manual process is contrasted with the proposed mechanized process, which offers significant potential for savings and operational improvements. A laboratory testbed has been used to help identify the necessary system functions, a workable system architecture, and the v... View full abstract»

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  • A flexible customer premises network concept based on ATM principles

    Publication Year: 1988, Page(s):246 - 250
    Cited by:  Papers (6)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    The author presents ideas concerning ATM (asynchronous transfer mode)-based customer premises networks (CPNs) that can easily be tailored to the needs of a broad range of customers, residential and small business. The architecture of a CPN is considered. An analysis of the needs of these users leads to a structural model for a CPN that features a high degree of modularity and interfaces with low-l... View full abstract»

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  • The 2B1Q line code for the local loop: genesis and transceiver implementation

    Publication Year: 1988, Page(s):19 - 23
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The genesis of the 2B1Q line code for ISDN basic rate access over metallic pair local loops is described. The reasons why 2B1Q was chosen for the emerging American National Standards Institute (ANSI) interface standard are outlined and the impact of the standard specification on transmission performance and the implementation complexity of transceivers is discussed. 2B1Q provides excellent perform... View full abstract»

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  • Optical subscriber loop transmission within B-ISDN

    Publication Year: 1988, Page(s):230 - 234
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Optical subscriber loop transmission systems for a broadband integrated systems digital network (B-ISDN) are discussed. The realization of a communication-only system with a hybrid integrated duplexer for bidirectional transmission and the operational results using Fabry-Perot and distributed feedback lasers at 1550 nm are described. The requirements for introducing broadband communication-only sy... View full abstract»

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  • ISDN trials on subscriber loops and customer premises wiring

    Publication Year: 1988, Page(s):47 - 51
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The results and operation issues pertaining to the ISDN basic rate access trials are described. The trials were performed on both the subscriber loop and the customer premises wiring. The test results for the U-interface and the S/T-interface are presented. The S/T-interface field trial was completed in two office high-rise buildings located in the Ottawa region. The main objective was to test the... View full abstract»

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  • Experiences with the IDA, and plans for an ISDN infrastructure at University College London

    Publication Year: 1988, Page(s):93 - 102
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    A description is given of the experience at University College London (UCL) with the British Telecom IDA prototype of a basic rate ISDN service. This experience has been limited to the use of Group IV facsimile, an early experiment in the provision of an X25 gateway to IDA, and its access from workstations via the IDA. As part of an experimental infrastructure, UCL is putting in much more extensiv... View full abstract»

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  • The application of optical multichannel techniques to the subscriber access area

    Publication Year: 1988, Page(s):184 - 189
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The installation of single-mode optical fibers within the subscriber access area can reduce network operating costs for the provision of basic services. The resulting passive optical network can then support the use of optical multichannel techniques to meet future demand for higher rate services. The authors consider two options for providing basic services and describe some of the ways in which ... View full abstract»

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  • Economics of digital carriers and fiber optic systems in subscriber loop

    Publication Year: 1988, Page(s):133 - 137
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    The authors address the economics of digital loop carriers (DLCs) and fiber-optic systems in the access network with reference to the ongoing digitization of local switching facilities. In the Italian network, DLCs are profitable for serving the growth of subscribers on exhausted cables longer than 1 to 2 km and to replace small-size electromechanical exchanges. These applications lead to an estim... View full abstract»

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  • The use of an ISO technique for conformance test specifications

    Publication Year: 1988, Page(s):257 - 261
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The implementation of universally consistent interfaces is usually hampered by the absence of adequate conformance standards. The authors describe and review a method of producing such conformance specifications through a case study involving the ISDN customer interface. It is shown that tabular and tree combined notation (TTCN) provides an easy-to-use, structured method of writing tests. It can b... View full abstract»

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  • The `policing function' to control user access in ATM networks-definition and implementation

    Publication Year: 1988, Page(s):240 - 245
    Cited by:  Papers (12)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    The authors define a policing function to be any mechanism that controls subscriber access to network capacity during exchange of information in a virtual circuit. While little is needed in circuit-switched networks, a policing function is of fundamental importance in future communication networks using asynchronous transfer modes (ATM), a new packet-oriented transmission principle for multiservic... View full abstract»

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  • Service opportunities for fiber to the home

    Publication Year: 1988, Page(s):14 - 18
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The deployment of fiber in the local loop in combination with broadband switching facilities will enable a wealth of new services to be offered to the residential customer from an arbitrary large number of competing service providers. Several of the service concepts are outlined, and possible local exchange carrier strategies for addressing the switched broadband opportunity are discussed. Switche... View full abstract»

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  • Fiber optic digital video signals transport for broadband subscriber network

    Publication Year: 1988, Page(s):222 - 229
    Cited by:  Papers (3)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    A discussion is presented of various approaches for the fiber-based broadband integrated services digital network. Emphasis is placed on residential area use, focusing on service aspects, system architecture, and transmission technology from the viewpoint of video signal transport. Two methods used to realize broadband subscriber networks are described in detail View full abstract»

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  • User benefits of ISDN in Germany

    Publication Year: 1988, Page(s):70 - 74
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The main user benefit of ISDN in the first echelon is cost saving. Based on the functionality and tariffs of ISDN in Germany, the typical saving is 30-50% in combined voice/data applications. For PABX and data transmission (computer networks) 10-80% can be saved. This however presupposes exiguous investment in terminals. A good solution is a cheap universal ISDN adaption card for a personal comput... View full abstract»

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  • Simulation of the embedded operations channel for ISDN basic access

    Publication Year: 1988, Page(s):42 - 46
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    A description is given of computer simulation and a mathematical model of the embedded operations channel (EOC) protocol which evaluates protocol performance. The simulated EOC acknowledgement times match the theoretical model to within 0.4% for bit error rates (BER) between 10 -8 and 10-3. The simulation results show that the EOC performs with negligible degradation during v... View full abstract»

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