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Esprit ’89 pp 1010-1022 | Cite as

Dynamically Adaptable Multi-service Switch (DAMS)

  • Reinhard Pohlit
  • Manfred Bleichrodt
Conference paper

Abstract

Currently, most voice and data services are provided by separate networks which use either circuit or packet switched techniques. The DAMS project is aimed to establish an integrated solution for the business environment. A distributed system architecture on the basis of a LAN/MAN was selected. It consists of a standardized optical backbone ring system connecting several subsystems which provide terminal and network access (figure 1). The system, where possible, is based on standardized protocols. The subsystems are specified to operate as stand-alone systems. They are subdivided into the following modular blocks:
  • Port Unit (to adapt to various terminals and external networks)

  • Local Switch Unit (to provide internal switching functions)

  • Backbone Unit (to connect the subsystem to the backbone ring)

  • Control Unit (for local system control)

In order to determine the best solution for the backbone ring standard, a performance analysis was carried out to investigate the two alternative proposed standards: FDDI-II and IEEE 802.6 (MST). The results showed that:
  • FDDI-II has a similar performance as IEEE 802.6 (MST)

  • certain management strategies improve the overall efficiency of bandwidth usage

  • no general problems arise by using ATM as a transmission technique, however further investigations are necessary

Investigations into the available technology and the support of these standards by semi­conductor manufacturers showed that there was more commitment to FDDI-II. For this reason it is expected that, for the first solution, the transmission scheme will be based on the emerging FDDI-II standard. It supports circuit switched (CS) and packet switched (PS) traffic types, with dynamic bandwidth allocation. Since asynchronous transfer mode (ATM) is expected to be a final integration mechanism, a strategy towards a long term solution based on ATM was elaborated. This includes an overall ATM system design and a migration strategy from a first hybrid solution (CS + PS) to ATM. Three possible signalling standards (CCITT No7, DPNSS & ISDN LAPD) have been considered suitable to be adapted to the DAMS requirements. A subset of CCITT No7 is preferred to be implemented on the FDDI-II backbone network.

Keywords

Asynchronous Transfer Mode Packet Switch Circuit Switch Backbone Ring Traffic Type 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    FDDI Token Ring Media Access Control, Draft Proposal ANSI X3T9.5, (1986), Rev. 10Google Scholar
  2. [2]
    FDDI Token Ring Physical Layer Medium Dependent, Draft Proposal ANSI X3T9.5, (1986), Rev. 5Google Scholar
  3. [3]
    FDDI Token Ring Physical Layer Protocol, Draft Proposal ANSI X3T9.5, (1986), Rev. 12Google Scholar
  4. [4]
    FDDI Token Station Management, Draft Proposal ANSI X3T9.5, (1986), Rev. 2Google Scholar
  5. [5]
    Metropolitan Area Network (MAN), Multiplexed Slotted and Token, Medium Access Control, Draft of Proposed IEEE Standard 802.6 (1986), Rev. AGoogle Scholar
  6. [6]
    Metropolitan Area Network (MAN), Multiplexed Slotted and Token, Physical Layer, Draft of Proposed IEEE Standard 802.6 (1986), Rev. AGoogle Scholar
  7. [7]
    Metropolitan Area Network (MAN), Isochronous Management Working Paper, Proposed IEEE Standard 802.6 (1986), Rev. BGoogle Scholar
  8. [8]
    Metropolitan Area Network (MAN), Station Management, Draft of Proposed IEEE Standard 802.6 (1986), Rev. BGoogle Scholar
  9. [9]
    FDDI-II Working Paper, Feb. 1987Google Scholar
  10. [10]
    FDDI-II Working Paper, Draft Proposal ANSI X3T9.5, April 1987Google Scholar
  11. [11]
    FDDI-II Working Paper, Internal Working Document, ANSI X3T9.5, June 1987Google Scholar
  12. [12]
    A Proposed Standard Hybrid Communications Bus, IEEE P1396, Oct. 1986Google Scholar
  13. [13]
    Hybrid Communications Backplane Bus Standard, IEEE P1396, March 1987, Version D1.01Google Scholar
  14. [14]
    A155 Mbit/s Communications Bus, IEEE P1396, Nov. 1987Google Scholar
  15. [15]
    Final Report for Esprit 1 Project 1059, Dynamically Adaptable Multi-service Switch (DAMS), July 1988Google Scholar

Copyright information

© ECSC, EEC, EAEC, Brussels and Luxembourg 1989

Authors and Affiliations

  • Reinhard Pohlit
    • 1
  • Manfred Bleichrodt
    • 1
  1. 1.TelenormaFrankfurt-1Germany

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