Adelphia Adds Terayon DOCSIS 2.0 Gear


Adelphia Communications Corp. has deployed more than 200 of Terayon Communication Systems Inc.’s DOCSIS 2.0 cable-modem termination systems for the MSO’s high-speed Internet customers.

It’s believed to be one of the first widespread launches of DOCSIS 2.0 gear in the U.S., according to Terayon executives.

The rollout in 10-plus markets also includes shipments of more than 200,000 TJ 715x DOCSIS 2.0 modems from Terayon, CEO Zaki Rakib said.

“The complete Terayon DOCSIS 2.0 solution allows us to stay ahead of our broadband competition by optimizing bandwidth and maximizing our existing infrastructure to offer higher speeds with great reliability,” Marwan Fawaz, chief technology offer at Adelphia, added in a statement. “DOCSIS 2.0 has enabled us to increase our broadband speeds today, and it is ideal for future offerings.”

Most of the cable industry is migrating to a service at speeds of 3 Megabits per second downstream and 384 Kilobits per second upstream.

Rakib said Adelphia began deploying Terayon’s DOCSIS 2.0 gear in the third quarter of last year. Sites included its Los Angeles system.

The CMTS and modems are in more than 10 Adelphia markets, he said, some of which are brand-new data deployments.

“Higher upstream speeds were hard to achieve with previous technology,” Rakib said. “People can experience noise and spikes of noise in the network, which causes down time or packet losses.

“DOCSIS 2.0 is a bigger pipe. If you are playing games, you will notice much less latency.”

The overall data service is more reliable with 2.0, Rakib added. “It’s closer to commercial-grade services.”

It’s one thing to get certified for DOCSIS and another to implement it in the field, Rakib also noted.

“It’s about getting people to be operationally ready,” he said. “It requires the training of people. The operations guys have to set up modulation profiles, there is operation support services and back-office integration. That is now behind us.”

Terayon has deployed 2,600 DOCSIS 2.0 line cards around the world, and it drew upon that experience for the Adelphia deployment.

What’s next? Rakib said there are discussions about extending DOCSIS 2.0 to further improve capacity.

There also is talk about how to make a much larger jump in speed — to say 120 Mbps — using the same hybrid fiber-coaxial infrastructure deployed today.

“We have the technology in place to do that,” he said.