ETR 075-3 : 20001

Foreword
1 Scope
2 References
3 Definitions
4 Basis of the special studies
  4.1 SECTION 1: Report on DC masks for Chapter 2
                 (subclause 2.3 of ETS 300 001)
  4.2 SECTION 2: Report on Input Impedance in the On-line
                 condition (subclause 4.1.2)
  4.3 SECTION 3: Annex to the Chapter 4.2, Degree of Unbalance
                 about earth
  4.4 SECTION 4: Harmonization feasibility for testing methods
                 Preliminary Report
Annex A: DC current and loop resistance, Country DC masks
      A.1 PSTN interfaces and feeding condition in the various
           call progress phases
      A.2 Mask area definitions for the DC characteristic
           masks study
      A.3 Superimposition area by area of the 19 country DC
           characteristic dots
      A.4 Sorting out of the 19 DC masks by shape category
      A.5 Maximal and maximal feeding condition superimposition
           for 19 country DC masks
      A.6 Common allowed area inside the 19 country masks
      A.7 Statistical study on the DC characteristics of the
           19 country masks
      A.8 Suggested target mask 1
      A.9 Critical points with respect to the target mask 1
      A.10 Target mask 1 compared to the common allowed area
      A.11 Superimposition of the 4 DC masks of the widest PSTN
           network in Europe
      A.12 Comparison of the (D, F, I, GB) masks with respect to
           the target mask 1
      A.13 Suggested target mask 2
      A.14 Nineteen Country DC mask by category
Annex B: Reference impedance in loop condition and country
         return-loss
      B.1 Summary of the various impedance in the European
           countries
      B.2 Reference impedance and return loss limits for the
           19 countries by category
Annex C: Degree of unbalance about earth graphs
      C.1 Degree of unbalance about earth LCL-QC one port-TE
      C.2 Degree of unbalance about earth LCL-LC one port-TE
      C.3 Degree of unbalance about earth LCL-QC two ports-TE
      C.4 Degree of unbalance about earth LCL-LC one port-TE
      C.5 Degree of unbalance about earth LCL-QC & LC two
           ports-TE
Annex D: Effects of the testing arrangements and MFPB signal
         timing
      D.1 Feeding bridge effects
      D.2 DC current and loop resistance testing method and
           testing topology
      D.3 LCL unbalance about earth testing method
      D.4 MFPB signal timing
History

Provides a detailed analysis of the requirements dealing with the DC Characteristic, the Input Impedance in loop conditions, the Degree of Unbalance about Earth, and a preliminary report for the harmonization feasibility for testing methods.