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Comcast Delivers Symmetrical 4Gbps Speeds in New 10G Test

Comcast
(Image credit: Comcast)

PHILADELPHIA—In a notable milestone in the race to offer consumers much faster broadband services, Comcast has announced that it has successfully tested a prototype 10G modem using the core technology that will deliver multigigabit speeds to tens of millions of homes.

The laboratory test, which Comcast said is a “world-first,” used a Full Duplex DOCSIS 4.0 system-on-chip (SoC) cable modem built by Broadcom to deliver upload and download speeds faster than 4 gigabits per second (Gbps) powered by 10G network technology.

The announcement is also a notable milestone in the cable industry’s 10G initiative to transform the way entertainment, data and services are delivered into the home with broadband and network speeds exponentially faster than those currently available in most markets. 

“The great strength of our smart network design is that we are able to exceed our customers’ demands today, even as we continuously evolve to meet the needs of the future,” said Charlie Herrin, president of technology, product, experience at Comcast Cable. “As our 10G journey continues to accelerate, customers will reap the benefits of ever-increasing security, reliability, and speed.”

10G technology builds on the work Comcast has done over the past several years to build a smarter, more virtualized network, Comcast said. In addition to providing a path to multigigabit upload and download speeds at scale, 10G updates will deliver near-term benefits to customers in the form of increased reliability, performance, and lower latency.

As part of that effort, Comcast announced in October 2021 a successful test of a complete 10G connection using a virtualized cable modem termination system (vCMTS) powered by DOCSIS 4.0 technology. That announcement followed major 10G milestone announcements in April 2021, of the first-ever live lab test of a 10G system-on-chip (SOC) and October 2020, of a trial delivering 1.25 gigabit-per-second (Gbps) upload and download speeds over a live production network using Network Function Virtualization (NFV) combined with the latest DOCSIS technology.

Connected by Broadcom 10G technology, the most recent modem test utilized the DOCSIS 4.0 FDX SoC device, which Comcast demonstrated in April 2021, to pair with two cable modem chips to deliver the breakthrough performance, Comcast reported. 

These were successfully connected over a lab-based hybrid fiber-coaxial network to the vCMTS operating in DOCSIS 4.0 mode. This represents the first complete network connection of all-DOCSIS 4.0 components that are required for deployment. The demonstrated speeds – which were faster than 4 Gbps upload and download – are expected to increase significantly as developers refine technology at every level of the 10G architecture.

“With each new milestone, we get a clearer picture of how 10G technologies will unlock the next generation of speed and performance for millions of people worldwide,” said Elad Nafshi, senior vice president of next generation access networks at Comcast Cable.

George Winslow

George Winslow is the senior content producer for TV Tech. He has written about the television, media and technology industries for nearly 30 years for such publications as Broadcasting & Cable, Multichannel News and TV Tech. Over the years, he has edited a number of magazines, including Multichannel News International and World Screen, and moderated panels at such major industry events as NAB and MIP TV. He has published two books and dozens of encyclopedia articles on such subjects as the media, New York City history and economics.