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Access signalling — Q.2931 and related standards

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BT Technology Journal

Abstract

This paper provides a brief description of the International Telecommunications Union (ITU-T) specified access signalling protocol Q.2931 and the supporting layer 2 signalling ATM adaptation layer (SAAL) that provides the release 1 signalling mechanism Digital Signalling System No 2 (DSS2). In addition to identifying the functions that are required to be incorporated in a signalling protocol to support call/connection establishment, in-call control and clear-down for a basic point-to-point call, the extensions required for a point-to-multipoint call are also considered. The paper then considers further extensions that have been produced to enable the negotiation, modification and look-ahead in relation to the connection in order to provide the capability set 2 step 1 DSS2 signalling mechanism. In conclusion, a simple road map to the DSS2 ITU-T standards in provided.

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References

  1. Law B: ‘Signalling in the ATM network’ BT Technol J, 12, No3, pp 93–107 (1994).

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  2. ITU-T Recommendations: ‘Q.2110, Q.2130 and Q.2931 (DSS2 Release 1 [Access] Signalling)’, (1994).

  3. Law B: ‘B-ISDN signalling standards’, BT Technol J, 16, No2, pp 11–19 (April 1998).

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  4. ITU-T Recommendation Q.1400: ‘Architecture framework for the development of signalling and OAM protocols using OSI concepts’, (1993).

  5. Knight R R and Law B: ‘The call control protocol in a separated call and bearer environment’, BT Technol J, 16, No2, pp 75–86 (April 1998).

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  6. ITU-T Recommendations: ‘Q.920, Q.921, Q.930 and Q.931’, (1993).

  7. ITU-T Recommendation I.363: ‘ATM adaptation layer’, (SG13) (1993).

  8. ITU-T Recommendation I.371: ‘Traffic control and congestion control in the B-ISDN’, (SG13) (1996).

  9. ITU-T Recommendation Q.767: ‘Application of the ISDN user part of CCITT SS No 7 at the international interface’, (SG11) (1991).

  10. ITU-T Recommendation Q.2971: ‘DSS2 layer 3 specification for point-to-multipoint call/connection control’, (SG11) (1995).

  11. ITU-T Recommendation Q.2932: ‘Generic functional protocol’, (SG11) (1996).

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Authors and Affiliations

  1. BT Laboratories, Martlesham Heath, Ipswich, Suffolk, England, IP 5 3RE

    B Law & R R Knight

Authors
  1. B Law
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  2. R R Knight
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Law, B., Knight, R.R. Access signalling — Q.2931 and related standards. BT Technology Journal 16, 58–74 (1998). https://doi.org/10.1023/A:1009665815036

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  • DOI: https://doi.org/10.1023/A:1009665815036

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