DOCSIS 2.0 spec completion promises faster cable modems

Cable modems could have triple the upstream capacity by the end of 2002, enabling video conferencing and peer-to-peer applications over cable connections.

CableLabs, a consortium of cable operators from North and South America, has completed the specification for DOCSIS 2.0 (Data Over Cable Service Interface Specification). The specification boosts the capacity of the upstream side of the connection compared to the previous version to 30M bps (bits per second) in both directions, CableLabs said in a statement Thursday.

DOCSIS 2.0 defines two modulation techniques: S-CDMA (synchronous code division multiple access) and A-TDMA (advanced frequency-agile time division multiple access).

Interoperability testing of products is due to start in the first quarter of this year and certification testing is expected by the third quarter, the consortium said.

Cable operators and suppliers have been working on the new specification since 1998, CableLabs said.

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Gillian Law

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