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Comcast Business Expands DOCSIS 3.1 Deployment


September 02, 2017

Comcast Business has announced the introduction of DOCSIS 3.1 internet services in a collection of Mid-Atlantic and Northeastern states.


The list includes Baltimore, Md.; the Boston area; Charlottesville, Va.; northern Delaware; New Jersey; the Philadelphia area; and Washington, D.C. Businesses in these cities, Comcast explained, now have access to DOCSIS 3.1-based Business Internet 500 and Business Internet 1 Gig services.

The services in these locations follows similar previous launches by Comcast Business in Atlanta; Chattanooga and Nashville, Tenn.; Chicago; Detroit; Huntsville, Ala.; and Miami. Comcast Business expects to introduce this technology and these services to additional cities later this year and into next year.

“Comcast is building the nation’s largest gig-speed network. We have been at the forefront of DOCSIS 3.1 deployment and today’s roll out further demonstrates our commitment to bringing this transformational technology to all businesses in our footprint,” said Kevin O’Toole, senior vice president of product management at Comcast Business. “Our gig-speed network allows businesses to quickly and easily scale network capacity at their locations to suit their individual needs and to support new technology applications on-site or in the cloud."

According to the CableLabs website, the initial version of DOCSIS, now called DOCSIS 1.0, supported 40Mbps downstream and 10Mbps upstream speeds. That was introduced in 1997. DOCSIS 1.1 offered the same speeds, but with added VoIP support. It came out in 2001. With the introduction of DOCSIS 2.0 in 2002 cable companies and their customers saw an increase in upstream speeds to 30Mbps.

Things really got interesting in 2008 with the introduction of DOCSIS 3.0. That came with the promise of 1Gbps downstream and 100Mbps upstream broadband. And DOCSIS 3.1, according to CableLabs, is capable of 10Gbps downstream, 1-2Gbps upstream rates. This technology was introduced just last year.

Something called Full Duplex DOCSIS 3.1 is what’s next. It promises 10Gbps connectivity in both the upstream and downstream directions.

Charter and Comcast have both commited to Full Duplex DOCSIS 3.1, according to a December piece by Daniel Frankel for FierceCable. A different piece from Frankel around the same time quoted CableLabs CSO Ike Elliott saying Full Duplex DOCSIS 3.1 will be in trials around the end of this year.

This upcoming technology, Elliott explained, requires bringing fiber to the last active component in the network. “There’s a big instructure investment to make,” he said, “so [Full Duplex] is not going to be available across a broad footprint on day one.”




Edited by Erik Linask

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