Although certification testing has not yet begun for Data Over Cable Service
Interface Specification 2.0, Comcast Corp. took a step toward the technology by
approving Terayon Communications Systems Inc.'s TJ 615 cable modem for use in
its high-speed data operations.
The Philadelphia-based MSO signed an agreement to deploy Terayon's TJ 615
cable modem in select systems.
The TJ 615 is a 1.1-certified modem that also incorporates the advanced time
division multiple access (A-TDMA) and synchronous code division multiple access
(S-CDMA) schemes called for in the DOCSIS 2.0 specification.
The fledgling DOCSIS 2.0 specification uses A-TDMA and S-CDMA in the physical
layer to triple upstream bandwidth and help clear up channel interference.
Not only could that lead to more symmetrical services aimed at business
customers and high-end residential users, but it also can be used in cable
plants that are inherently signal noisy.
'The value of DOCSIS 2.0 is immense, and I'm very pleased to see products
like Terayon's TJ 615 modem - which is based on the complete DOCSIS 2.0
specification - now on the market,' said John Treece, director of new
product/technology development for Comcast.
'Though DOCSIS 2.0 qualification and certification testing has yet to begin,
the availability of the TJ 615 and other cable data equipment based on a full
DOCSIS 2.0 specification is a terrific first step in helping the cable industry
migrate to DOCSIS 2.0.'