CableLabs on Thursday handed out passing grades to another 12 cable modems for DOCSIS 2.0, an advanced specification that widens cable's upstream path several fold.

Vendors that achieved 2.0-certified status following certification wave 25 were: Ambit, Arris, Castlenet, Com21, Hitron, Linksys, Motorola, Scientific-Atlanta, Terayon and Thomson.

"This is a great volume of certified product coming forth, considering this is only our second DOCSIS 2.0 test wave," said Comcast Corp. Senior Vice President of New Media Development Steve Craddock, in a press release.

Terayon, however, remains the lone vendor to have a cable modem termination system (CMTS) qualified for DOCSIS 2.0.

On the DOCSIS 1.1 front, CableLabs certified modems from Arris, D-Link, Kinpo, LinkSys, Scientific-Atlanta, SMC Networks, Terayon, and Thomson; and qualified one CMTS from Cisco Systems. CableLabs also awarded DOCSIS 1.0 certification to DX Antenna, Thomson and Toshiba.

During the wave, CableLabs also performed parallel certification/qualification tests on equipment based on CableHome 1.0 and PacketCable 1.0. CableLabs said it will release those results Friday morning.