xDSL

Introduction

DSL (Digital Subscriber Line) makes use of the unused frequency spectrum of the twisted pair telephone cables by carrying a digital signal without interfering with the voice service.

ETSI is very active in the definition of physical layer standards for DSL technologies including DSL 'splitters' required to separate voice and data. The work originated with the concept of Integrated Services Digital Network (ISDN), and the so-called xDSL family has continued to grow ever since.

Our Role & Activities

TC ATTM Working Group TM 6 is responsible for digital access transmission systems particularly for digital subscriber line systems (DSL) on balanced wired (twisted pair) Infrastructures and will produce within their scope:

  • Specification of functional and physical characteristics of signals and interfaces on the physical line and at the network and the user side
  • Frequency and spectrum management of bands allocated to these systems
  • Specification of DSL filters and splitters
  • Compatibility and co-existence studies between POTS/ PSTN and other technologies, particularly those sharing the same infrastructure.
  • Specification of common DSL testing methodology

Standards

The following is a list of the latest published ETSI standards on xDSL.

A full list of related standards in the public domain is accessible via the ETSI standards search. Via this interface you can also subscribe for alerts on updates of ETSI standards.

For work in progress see the ETSI Work Programme on the Portal.

Standard No. Standard title.
TS 101 952-4 Access, Terminals, Transmission and Multiplexing (ATTM); Access network xDSL splitters for European deployment; Part 4: Specification for dynamic distributed filters for xDSL over POTS
TS 101 952-3 Access, Terminals, Transmission and Multiplexing (ATTM); Access network xDSL splitters for European deployment; Part 3: Generic specification of static distributed filters for xDSL over POTS
TS 101 952-2 Access, Terminals, Transmission and Multiplexing (ATTM); Access network xDSL splitters for European deployment; Part 2: Generic specification of xDSL over ISDN splitters and xDSL universal splitters
TR 102 702 Access, Terminals, Transmission and Multiplexing (ATTM) Study of issues related to POTS injection in the customer wiring from xDSL VoIP Home Gateway
TS 101 952-1 Access network xDSL splitters for European deployment; Part 1: Generic specification of xDSL over POTS splitters