IEEE Transactions on Communications

Issue 9 • September 1982

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Displaying Results 1 - 25 of 29
  • [Front cover and table of contents]

    Publication Year: 1982, Page(s): 0
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    Freely Available from IEEE
  • Guest Editor's Prologue: The Evolution of Electronic Loop Systems in the 1980's

    Publication Year: 1982, Page(s): 2005
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    Freely Available from IEEE
  • Design Considerations for a CO-Powered Distributed-Drop PCM Station Carrier

    Publication Year: 1982, Page(s):2022 - 2028
    Cited by:  Patents (53)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB)

    A 24 channel pulse code modulation (PCM) station carrier system has been developed which is powered by the repeatered DS-1 span line and also possesses distributed-drop capability. These features were realized by bridge powering the span line repeaters and efficient power utilization at the subscriber terminals. The design philosophy behind this unique system capability is given along with an oper... View full abstract»

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  • Experimental Bidirectional Subscriber Loop Transmission System

    Publication Year: 1982, Page(s):2066 - 2073
    Cited by:  Papers (5)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (825 KB)

    This paper describes a complete hardware implementation of an experimental two-wire digital subscriber loop transmission system using balanced pairs of wires. It is based on the time division burst mode transmission scheme (ping-pong), and provides two information channels, 64 kbits/s and 8 kbits/s, and a signaling channel both ways. The burst cycle is 2 ms and line transmission rate is 192 kbits/... View full abstract»

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  • Line Equalizer for a Digital Subscriber Loop Employing Switched Capacitor Technology

    Publication Year: 1982, Page(s):2074 - 2082
    Cited by:  Papers (27)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (925 KB)

    A new line equalizer system for time compression burstmode digital suhscriber loop transmission that can equalize a line with multiple bridged taps (BT's) is developed. Using the developed equalizer, up to 5 km (0.4 mmφ) line length and four BT connections can be equalized at a data rate of 80 kbits/s in each direction. The equalizer is composed of a variable gainsurd{f}step equili... View full abstract»

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  • Large-Scale Integration of Hybrid-Method Digital Subscriber Loops

    Publication Year: 1982, Page(s):2095 - 2108
    Cited by:  Papers (34)  |  Patents (67)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1620 KB)

    This paper reports on studies concerning the feasibility of large-scale integrated realization of the circuits needed to provide hybrid-mode full-duplex digital transmission at 80 kbits/s or higher rates over standard local telephone loops. Alternative means of achieving the required 60 dB or so of echo cancellation have been studied in detail. The conclusion is that a combination of analog and di... View full abstract»

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  • Considerations on Customer Access to the ISDN

    Publication Year: 1982, Page(s):2131 - 2136
    Cited by:  Papers (1)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    A concept for a digital customer access to an integrated services digital network (ISDN) is proposed. It is based on a passive bus which conveys information by means of two circuit switched B channels and aDchannel to support associated signaling (outslot channel) dynamically multiplexed with slow speed packetized data and telemetry. The customer access can support multiple terminal arr... View full abstract»

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  • [Back cover]

    Publication Year: 1982, Page(s): 0
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    Freely Available from IEEE
  • Progress Towards User Access Arrangements in Integrated Services Digital Networks

    Publication Year: 1982, Page(s):2117 - 2130
    Cited by:  Papers (16)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1344 KB)

    This paper deals with arrangements for local access to emerging Integrated Services Digital Networks (ISDN's). The ISDN concept is here introduced as the focal point for the ongoing international activity on multiservice digital networks. ISDN's are conceived as networks which have evolved from the basic digital telephone networks and they will provide end-to-end digital connectivity to support a ... View full abstract»

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  • Adaptive Reference Echo Cancellation

    Publication Year: 1982, Page(s):2083 - 2094
    Cited by:  Papers (57)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    The AREC (adaptive reference echo cancellation) algorithm is presented for an echo canceler used in full-duplex two-wire digital transmission on digital subscriber loops. The AREC algorithm incorporates a decision-directed estimation of and compensation for the far-end signal which is a source of interference to the conventional echo canceler adaptation algorithm. The AREC algorithm thus offers mu... View full abstract»

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  • Positioning the Subscriber Loop Network for Digital Services

    Publication Year: 1982, Page(s):2006 - 2011
    Cited by:  Papers (12)  |  Patents (53)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    The need to enhance the digital transmission capability of the local loop network to provide for new services is widely recognized in the telecommunications industry. Companies around the world [1]-[3] have been working towards this goal and plan to use digital loop carrier (DLC) to meet this demand. Although this approach is generally accepted, there has been little information presented on how t... View full abstract»

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  • Optical Fiber Multiservice Subscriber Connection System: SAFO

    Publication Year: 1982, Page(s):2215 - 2220
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    New services using moving pictures will be rapidly increasing within a few years. In a first analysis, they can be classified into three main categories: one-way broadcasted services; one-way video request services; and two-way interactive services. An important issue in their success is the cost of furnishing them. A SAFO project was undertaken to examine such service offerings, utilizing optical... View full abstract»

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  • Application of Digital Pair-Gain System SLCTM-96, in Developing Countries

    Publication Year: 1982, Page(s):2016 - 2021
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The loop pair-gain system provides an alternative to the traditional cable and structure design of the subscriber loop plant. As low-cost digital transmission technologies continue to emerge, their application in the subscriber loop plant has grown substantially and has found many different uses. The SLC-96 system [1] is a new, versatile pair-gain system handling the broad spectrum of telecommunic... View full abstract»

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  • 4TEL Automated Subscriber Line Test System

    Publication Year: 1982, Page(s):2034 - 2037
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Powerful computer techniques and sophisticated measurement technology have been applied to local distribution networks by the 4TEL Automated Subscriber Line Test System. It provides PTT's and telephone companies with a total solution to the problems of improving quality of service and reducing costs. The main features of routine testing, line testing, fault location, and special diagnostic testing... View full abstract»

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  • Customer Access System Design

    Publication Year: 1982, Page(s):2143 - 2149
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    The key to the successful emergence of the information society [1] is an access system that permits new and diverse communication services to flourish. A fundamental component of such a network is a digital end-to-end communication capability. This paper presents an approach to the design of a digital access system for application in both residential and business environments. Switch, customer pre... View full abstract»

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  • Economic Aspects of Multiservice Subscriber Loops in Telematics Networks

    Publication Year: 1982, Page(s):2211 - 2214
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    Since 1975, and in cooperation with the French Telecommunications Authority, we have been conducting field trials and feasibility studies to determine the capability of existing copper loop plant to support telematics services. This paper presents some of the economic information that has come out of our program. The economic analysis proceeds from a study of the technical options most likely to p... View full abstract»

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  • Initial Experience with the Milton Keynes Optical Fiber Cable TV Trial

    Publication Year: 1982, Page(s):2155 - 2162
    Cited by:  Papers (14)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    This paper describes a small trial of an advanced cable TV network with evolutionary potential for the wideband local network of the future. Major features of the trial are optical fiber transmission throughout, switched program provision, and a star type of network. Initial experience is related giving both successes and difficulties encountered on design and installation phases. The conclusions ... View full abstract»

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  • Design Philosophy and Hardware Implementation for Digital Subscriber Loops

    Publication Year: 1982, Page(s):2057 - 2065
    Cited by:  Papers (8)  |  Patents (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    This paper presents various requirements and configurations in the information network system (INS) NTT's version of the integrated services digital network (ISDN)- such as field trials, and technologies and equipment design of the digital subscriber loop using balanced wire pairs. The main aspects characterizing digital subscriber loops, are a customer access structure, a digital transmission sys... View full abstract»

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  • Subscriber Stations in Service Integrated Optical Broad Band Communications Systems

    Publication Year: 1982, Page(s):2163 - 2171
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    Subscriber stations in service integrated communications systems can be implemented in many different ways. Within the HHI Broad-Band Communications System two extremely different solutions have been realized: on the one hand, subscriber stations in a conventional star type network with central exchange and analog transmission, and on the other hand, subscriber stations in a digital, loop-structur... View full abstract»

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  • A Field Trial of Fiber Optic Subscriber Loop Systems Utilizing Wavelength-Division Multiplexers

    Publication Year: 1982, Page(s):2172 - 2184
    Cited by:  Papers (14)  |  Patents (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1752 KB)

    Future subscriber loops will provide various services including broad-band video. Fiber optic technology is the key for introducing these services. The Electrical Communication Laboratories (ECL) of Nippon Telegraph and Telephone Public Corporation (NTT) have been promoting research and development on basic technology of fiber optic subscriber loops, and studying the ways to use fiber optic subscr... View full abstract»

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  • A Highly Distributed Mechanized Loop Testing System

    Publication Year: 1982, Page(s):2038 - 2045
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    A second generation of the Mechanized Loop Testing System MLT-2 has been developed to extend the mechanized loop testing capabilities of the Bell System Automated Repair Service Bureau to small testing regions and to eliminate the need for manual testing systems such as local test desks, which require high craft skill levels. These objectives have been met using a highly distributed processing arc... View full abstract»

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  • ISDN Network Terminating Equipment

    Publication Year: 1982, Page(s):2137 - 2142
    Cited by:  Papers (4)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    For the introduction of an integrated services digital network (ISDN) service in Britain in 1983, three versions of network terminating equipment (NTE) are being developed. The interfaces to the NTE and the functions to be performed by the NTE are described. Details are given of the NTE's which range in complexity from an NTE offering digital telephony and a simple data port, to a comprehensive da... View full abstract»

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  • An Integrated Voice/Data Terminal with Simple Synchronization Circuits Using an 80 kbit/s Ping-Pong Method

    Publication Year: 1982, Page(s):2109 - 2116
    Cited by:  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    With recent digital technique progress, digitalization is spreading to subscriber loop systems. In-house systems will be digitalized earlier than other systems. In in-house networks, a pingpong method, especially an 80 kbit/s ping-pong method, using an existing cable pair, is superior to other digital transmission methods due to the sample system structure. For office use, a digital subscriber ter... View full abstract»

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  • PRANA at the Age of Four: Multiservice Loops Reach Out

    Publication Year: 1982, Page(s):2185 - 2210
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2640 KB)

    Can the French loop plant support voice and multiservice data traffic simultaneously? If so, what techniques are available for practical ISDN operations before 1990, at prices attractive to the domestic subscriber? Four years ago CNET, the French National Center for Telecommunications Research, agreed to back our plan for finding practical answers to those questions. This paper presents our method... View full abstract»

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  • A Time Compression Multiplexing System for a Circuit Switched Digital Capability

    Publication Year: 1982, Page(s):2046 - 2052
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    The time compression multiplexing (TCM) technique offers a solution to the problem of achieving digital penetration of the two-wire loop plant. TCM is planned to provide the digital loop transmission in the new circuit switched digital capability of the Bell System, so that a full-duplex 56 khit/s digital connection is obtained between subscriber's premises and the serving central office. Herein, ... View full abstract»

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Aims & Scope

IEEE Transactions on Communications focuses on all telecommunications including telephone, telegraphy, facsimile, and point-to-point television by electromagnetic propagation.

 

 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Naofal Al-Dhahir
University of Texas at Dallas