A quartet of cable modems now bears fresh Data Over Cable Service Interface
Specification 2.0 stamps after the latest certification round at Cable
Television Laboratories Inc.
The Louisville, Colo.-based technical consortium announced that four modems
won DOCSIS 2.0 certification, bringing the total to 22. Two modems from Terayon
Communication Systems Inc. passed the test, along with units from Texas
Instruments Inc. and Thomson Consumer Electronics.
DOCSIS 2.0 uses advanced-physical-layer technology to triple the upstream
throughput for cable modems compared with DOCSIS 1.1 systems. It also does a
better job of screening out interference in the chronically noisy upstream
While the number of DOCSIS 2.0-certified modems is increasing, the same is
not true for key cable-modem-termination systems. Terayon remains the only
vendor with a qualified DOCSIS 2.0 CMTS, and there were no other CMTS units
submitted for testing during the latest round.
CableLabs also certified a batch of DOCSIS 1.1 modems in the certification
wave. Castlenet Technology Inc., Cisco Systems Inc. subsidiary Linksys and
Motorola Inc. each gained stamps for two modems, along with units from Ambit
Microsystems Corp., Belkin Corp., Cisco, SMC Networks Inc. and Toshiba America
Information Systems Inc.
In addition, CMTS units from ADC Telecommunications Inc. and Arris won DOCSIS
CableLabs will release results from CableHome and PacketCable certification