ETR 276 : 20001

Foreword
1 Scope
2 References
3 Abbreviations and definitions
  3.1 Abbreviations
  3.2 Definitions
4 General considerations
  4.1 ONP Context
  4.2 SDH leased line service clarifications
5 Existing standards
  5.1 Standards relevant to interfaces
  5.2 Standards relevant to connection characteristics
  5.3 Relationships of the standards
6 Examination of the technical requirements
  6.1 Connection arrangements
  6.2 Timing and synchronisation
  6.3 Interface characteristics
  6.4 Connection characteristics
7 Conclusions on proposed standards
  7.1 General conclusions
  7.2 Proposed standards
  7.3 Extent of the work to be done
  7.4 Work program
8 Possible evolutions
  8.1 Unidirectional connections
  8.2 Point to multipoint connections
  8.3 Reconfiguration of leased line connection
  8.4 New interfaces
  8.5 Alternative PDH interfaces
  8.6 Support of concatenated VC-n
Annex A: List of proposed SDH leased line standards
Annex B: Proposed tables of contents and scopes
      B.1 Network and terminal equipment interface
          presentation ETS
      B.2 Connection characteristics ETS
      B.3 Terminal equipment VC-n presentation to SDH leased
          lines ETS
Annex C: Proposed work program
Annex D: Alternative PDH interfaces
Annex E: Assignment of VC-n at leased line interfaces
      E.1 Assignment of VC-4 in STM-4 interfaces
      E.2 Assignment of VC-3 and TUG-3 in a VC-4
      E.3 Assignment of VC-2 and TUG-2 in a TUG-3
      E.4 Assignment of VC-12 in a TUG-2
History

Purpose of this document is to produce European Telecommunication Standards for access to Synchronous Digital Hierarchy (SDH) leased lines with Synchronous Transport Module-N (STM-N) network presentations at the Network Termination Point (NTP).