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xDSL
General information
- An
overview of the activities is available on the web
- Cooperation agreement with ITU-T (SG 15)
- Organisations like DSL Forum and many industry members with global
dimension influence strongly ETSI developments
For further information, these matters are largely handled in
the ETSI Technical Committee TM6.
Standards are recommended by regulating authorities
- (OJEC): Official Journal of the European Communities (C 331/40;
31/12/2002). Further information are available on
ECN&S, e.g.
SR 002 211.
Spectral management (under study)
- Key guidance on
TR 101 830 (OJEC) series of documents.
Compatibility with POTS and ISDN largely covered
Euro-ADSL (Asymmetric Digital Subscriber Line)
- Key standard
TS 101 388 (OJEC)
- Approximately 6 Mbit/s downstream / 800 kbit/s upstream
- Revision started to increase bit-rates and enhance flexibility
Euro-VDSL (Very high-speed Digital Subscriber Line)
- Key standard
TS 101 270 (parts 1 & 2) (OJEC)
- Transceivers using single carrier or multi-carrier techniques
- Revision include PSD (Power Spectral Density) revised masks, performance
Euro-SDSL (Symmetrical single-pair high bit rate DSL)
- Key standard
TS 101 524 (OJEC)
- Multi-rate symmetric Transmission up to 2.3 Mbit/s (single pair)
- Work on expansion to provide 10 Mbit/s (multiple pairs)
- Asymmetric data-rates optional
HDSL (High bit-rate DSL)
ISDN Basic Rate Access enhancements
Euro-VoDSL (simultaneous Voice and data over DSL)
- Specification of low and high latency channels
- Dynamic bit-rate repartitioning included
Service aspects are generally treated in
TISPAN
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