TS 101 135 : 1.5.3

Intellectual Property Rights
Foreword
1 Scope
2 References
3 Abbreviations
4 Reference configuration and functional
  description
5 HDSL core specification
  5.1 Functions
  5.2 Transmission medium
  5.3 Transmission method
  5.4 Frame structure
  5.5 HDSL embedded operations channel
      (eoc)
  5.6 Start-up procedure
  5.7 Operation and Maintenance (O&M)
  5.8 Electrical characteristics of a
      single 2B1Q transceiver
  5.9 Performance of individual HDSL
      transceivers
6 Common circuitry specification
  6.1 Delay difference buffer
  6.2 The pair identification mechanism
  6.3 Laboratory performance measurements
7 Application specific requirements
  7.1 Application specific requirements
      for ISDN PRA
  7.2 Application specific requirements
      for the 2048 kbit/s digital
      unstructured leased line (D2048U)
  7.3 Application specific requirements
      for the 2048 kbit/s digital structured
      leased line (D2048S)
  7.4 Application specific requirements
      for fractional installation
  7.5 Application specific requirements
      for partial operation
  7.6 Application specific requirements
      for the 2 048 kbit/s mapped into
      TU-12 structure
  7.7 Application specific requirements
      for the simultaneous connection of
      2 048 kbit/s digital signals and
      ISDN-BA inside the HDSL core frame
  7.8 Application specific requirements
      for the simultaneous connection of
      2 048 kbit/s digital signals and
      analogue telephone lines inside
      the HDSL core frame
8 Power feeding
  8.1 General
  8.2 Wetting current
  8.3 Remote power feeding aspects
9 Environmental requirements
  9.1 Climatic conditions
  9.2 Safety
  9.3 Overvoltage protection
  9.4 Electromagnetic compatibility (EMC)
Annex A (informative): Detailed definition
        of cable characteristics and test
        loops
    A.1 Typical characteristics of cables
    A.2 Theoretical characteristics of test
        loops for Y = 31 dB at 150 kHz
Annex B (normative): High bit-rate Digital
        Subscriber Line (HDSL) CAP based system
    B.1 Scope and general information
    B.2 References
    B.3 Abbreviations
    B.4 Reference configuration and
        functional description
    B.5 HDSL core specification
    B.6 Common circuitry specification
    B.7 Application specific requirements
    B.8 Power feeding
    B.9 Environmental requirements
Annex C (informative): Transmission system
        for 1 544 kbit/s two pair system
        application
    C.1 Frame structure of the two pair
        system for 784 kbit/s
History

Describes a transmission technique called High bit-rate Digital Subscriber Line (HDSL), as a means for the transportation of several types of applications. It defines the requirements for the individual HDSL transmission system, the transmission performance, the HDSL maintenance requirements and procedures and the mapping of information from the dedicated applications. This work item studies the problems involved in combining the transmission of ISDN-BA (or POTS) and 2048 kbit/s data transmission over HDSL transmission systems.