TR 101 728 : 1.2.1

Intellectual Property Rights
Foreword
Introduction
1 Scope
2 References
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 General functional description of splitters
  4.1 Overview
  4.2 Option 1: LPF in splitter unit
  4.3 Option 2: LPF and "weak" HPF in splitter unit
  4.4 Option 3: LPF, HPF and DC blocking in splitter unit
  4.5 Other aspects
5 Splitter requirements (Low pass part)
  5.1 DC requirements
       5.1.1 Polarity independence
       5.1.2 DC resistance to earth
       5.1.3 DC resistance between A-wire and B-wire
       5.1.4 DC series resistance
       5.1.5 DC feeding current
  5.2 Terminating impedances
       5.2.1 Z[ADSL]
       5.2.2 Z[R] and Z[SL]
       5.2.3 Z[RHF]
  5.3 Pass band Loss requirements
       5.3.1 Voltage drop at 25 Hz and 50 Hz
       5.3.2 Insertion loss
       5.3.3 Insertion loss distortion
  5.4 Impedance at 25 Hz and 50 Hz
  5.5 Impedance of splitters in the voice band
  5.6 Impedance of "transparent" and "single impedance"
       splitters
       5.6.1 Impedance of a single LE splitter
             5.6.1.1 Impedance testing at the POTS-port,
                     option A
             5.6.1.2 Impedance testing at the POTS-port,
                     option B
             5.6.1.3 Choice of reference Impedance and Return
                     Loss values (options A or B)
             5.6.1.4 Impedance testing at the Line port
       5.6.2 Impedance of a single Remote splitter
             5.6.2.1 Impedance testing at the POTS port
             5.6.2.2 Impedance testing at the Line port
  5.7 Unbalance about earth
       5.7.1 The two port test
       5.7.2 The three port test
  5.8 Isolation (Insertion Loss) at 32 kHz to 1 100 kHz
  5.9 Noise
       5.9.1 Noise 300 Hz to 4 000 Hz
       5.9.2 Noise 26 kHz to 1 100 kHz
  5.10 Distortion and Intermodulation
       5.10.1 Distortion
       5.10.2 Intermodulation
  5.11 Group Delay Distortion
  5.12 Metering at 12 kHz or 16 kHz
  5.13 Common Mode Impedance
  5.14 Immunity to high level POTS signals
  5.15 Additional requirements for Option 2 (LPF and "weak" HPF)
  5.16 Additional requirements for Option 3 (LPF, "full" HPF
       and DC block)
6 Distributed filters (additional requirements)
  6.1 DC requirements
      6.1.1 DC resistance to earth
      6.1.2 DC resistance between A-wire and B-wire
  6.2 Pass band
      6.2.1 Voltage drop at 25 Hz and 50 Hz
      6.2.2 Insertion Loss
      6.2.3 Insertion Loss distortion
  6.3 Impedance of distributed (remote) filters
      6.3.1 Impedance testing at the POTS port
      6.3.2 Impedance testing at the Line port
  6.4 Unbalance about earth
  6.5 Isolation (Insertion Loss) at 32 kHz to 1 100 kHz
  6.6 Line side impedance of low pass filter at ADSL frequencies
      (32 kHz to 1 100 kHz)
  6.7 Installation of filters
7 Other requirements
  7.1 "Signature network" for maintenance purposes
  7.2 Line tests
Annex A: Impedance of splitters for special cases
      A.1 Impedance of a single LE splitter
          A.1.1 Impedance testing at the POTS port
          A.1.2 Impedance testing at the Line port
      A.2 Impedance of a single Remote splitter
          A.2.1 Impedance testing at the POTS port
          A.2.2 Impedance testing at the Line port
Annex B: General functional description of splitters
      B.1 Overview
      B.2 LPF in splitter unit (HPF and DC blocking in ADSL modem)
      B.3 LPF and DC blocking in splitter unit (HPF in ADSL modem)
      B.4 LPF, DC blocking and full HPF in the splitter unit
      B.5 LPF, DC blocking and part of HPF in splitter unit
      B.6 Z[ADSL] options for different splitter designs
      B.7 LPF and DC blocking in splitter unit (HPF in ADSL modem)
      B.8 LPF, DC blocking and full HPF in the splitter unit
      B.9 LPF, DC blocking and part of HPF in splitter unit
History

Provides the basis for specification of requirements and test methods for the low pass section of POTS/ADSL splitters.