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Terayon's 1.1 modem targets DOCSIS 2.0 market

Thu, 09/27/2001 - 8:00pm
Anne Kerven

Terayon Communication Systems Inc. says its TJ615 cable modem will be available in this year's fourth quarter. Deployable as a certified DOCSIS 1.0 modem, it's also DOCSIS 1.1-based and includes OpenPhy, Terayon's S-CDMA and A-TDMA technologies.

Terayon says plans include enabling cable operators to get the increased upstream performance of DOCSIS 2.0 — which includes the CDMA and TDMA technologies — before CableLabs begins qualifying and certifying products to the new specification.

Early this month, CableLabs announced it was going forward with DOCSIS 2.0, an updated DOCSIS spec that features advanced modulation methods.

The spec includes S-CDMA and A-TDMA modulation, and will allow upstream speeds of 30 Mbps per 6 MHz, with "noise immunity," CableLabs said then. By contrast, DOCSIS 1.0 allows 5 Mbps per 6 MHz, and 1.1 provides 10 Mbps.

CableLabs said the upgrade significantly increases cable bandwidth for data transmission — without the physical rebuilding of cable networks. Version 2.0 will be backward compatible with DOCSIS 1.0 and 1.1 cable modems and CMTSs, and allows more protection against cable systems' "electronic impairments," CableLabs said.

CableLabs was starting specification development immediately and expected to finish by year's end.

Terayon also notes the Terayon BE 2000 and 2800 second-generation DOCSIS 1.0 CMTSs "complement" the new modem. It also is developing OpenPhy headend solutions to combine with the TJ615 that will be interoperable with existing DOCSIS-qualified CMTSs and DOCSIS-certified modems. The move will let operators use the OpenPhy technology without replacing 1.0 and 1.1 equipment.

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