(Data Over Cable Service Interface Specification) A cable modem standard from the CableLabs research consortium (www.cablelabs.com), which provides equipment certification for interoperability. DOCSIS supports IP traffic (Internet traffic) over digital cable TV channels, and most cable modems are DOCSIS compliant.
Originally formed by four major cable operators and managed by Multimedia Cable Network System, management of the project was later turned over to CableLabs.
DOCSIS 1.x, 2.0 and 3.0
The first versions of DOCSIS (1.0, 1.1 and 2.0) provided a maximum downstream speed of approximately 40 Mbps with upstream speeds of 10 Mbps for Versions 1.x and 30 Mbps for DOCSIS 2.0. Introduced in 2006, DOCSIS 3.0 added channel bonding. The minimum number of channels that are coupled is four, providing maximum downstream/upstream speeds of 160/120 Mbps. In practice, all this bandwidth is shared among neighboring subscribers. See cable modem, EuroDOCSIS, eDOCSIS, CMTS and S-CDMA.
Originally formed by four major cable operators and managed by Multimedia Cable Network System, management of the project was later turned over to CableLabs.
DOCSIS 1.x, 2.0 and 3.0
The first versions of DOCSIS (1.0, 1.1 and 2.0) provided a maximum downstream speed of approximately 40 Mbps with upstream speeds of 10 Mbps for Versions 1.x and 30 Mbps for DOCSIS 2.0. Introduced in 2006, DOCSIS 3.0 added channel bonding. The minimum number of channels that are coupled is four, providing maximum downstream/upstream speeds of 160/120 Mbps. In practice, all this bandwidth is shared among neighboring subscribers. See cable modem, EuroDOCSIS, eDOCSIS, CMTS and S-CDMA.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2009 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Comcast's Burke: TV Everywhere trials going national in 30 to 60 days
- Comcast has built a TV Everywhere site that's "complicated technically," but will roll out nationally as a pilot in the next 30 to 60 days, said Stephen Burke, chief operating officer of the cable giant. Burke, speaking at the Bank of America Merrill Lynch 2009 Media, Communications...
- Blog posts 2009-09-09
- The United States of broadband: All of the speed is on the east coast
- Akamai's state of the Internet report for the first quarter illustrates the distribution of broadband speeds in the U.S. The real speed appears to be on the east coast. Here's the distribution of broadband in the top 10 states: Akamai...
- Blog posts 2009-07-09
- Optimum Ultra: So how fast is it?
- Optimum Ultra: So how fast is it?Up to 101Mbps is not fastI get a MINIMUM of 100 Mbps plus VoIP including the phone for a whopping $20/month. No limits. No caps. I don't live in America, but you guys are getting seriously ripped off. Just my 2 cents.Fastest service where...
- Discussion threads 2009-07-07
- Optimum Ultra: So how fast is it?
- Optimum Online's $99 per month Ultra DOCSIS 3.0 service is one of fastest residential broadband offerings available today. But is it really "Up to" 101Mbps as advertised? As I mentioned in a post last week about broadband service outages, Last Friday, I was...
- Blog posts 2009-07-07
- News to know: Best hardware; Malware; Netbooks; Social CRM
- Here are today's notable headlines. You can get News To Know via email alert and RSS daily. For continuous updates see BNET's around-the-Web tech coverage. Paul Greenberg:Â Time to Put A Stake in The Ground on Social CRM Adrian Kingsley-Hughes: Hardware 2.0 'Very Best Kit...
- Blog posts 2009-07-06
- Frugal Friday: Optimum Ultra and DOCSIS 3.0, Crapware, When to replace a PC, Engine Yard and Ruby on Rails
- Frugal Networker Ken Hess and I discuss my adventures in Optimum Ultra 100Mbps cable broadband service (and experience the hilarity of early adoption when my VOIP cuts out 3 times during the broadcast) the bane of crapware, the decision of when to replace a small...
- Blog posts 2009-07-04
- The Harsh Reality of Suburban Broadband, Part Deux
- Goddamit! Why have I been offline for so long? As I explained in a previous article last summer about my broadband situation, my employer, like many large technology services companies, has elected to classify my work situation as "Home-Based", in that...
- Blog posts 2009-06-26
- Verizon dismisses Cablevision 101 Mbps claims; Price war looming?
- Cablevision appears to have struck a nerve at Verizon with its launch of a 101 megabits-per-second broadband service. On Tuesday, Cablevision detailed the launch of Optimum Online Ultra, a 101 Mbps service, available in the New York area. The service, which will be offered in Cablevision's region,...
- Blog posts 2009-04-30
- As economy plummets, cable, satellite TV bills are on the rise
- When the country fell into a severe recession in the second half of 2008, prices dropped nearly across the board in response to consumers becoming reluctant to spend money on anything beyond basic necessities. But according to a new study conducted by research firm Centris, the cable/satellite TV industry was...
- Blog posts 2009-04-20
- What open source should tell the FCC
- What open source should tell the FCCyou are rightThe very wealthy in the US will not give up their power easily. Open and free internet is the enemy of the rich and powerful.The free flow if ideas is what they are trying to stop, here and in places like China.I...
- Discussion threads 2009-04-09
- Broadband tax credit cut from stimulus bill
- Broadband tax credit cut from stimulus billBrighthouse will be offering 50Mbs downstream in florida this yearI think either way though, its going to mainly benifit telephone companies.Cable provider lines out in the boonies are sparce.Its funny they are giving tax credits to monopolies that already overcharge in areas they know...
- Discussion threads 2009-02-12
- The Gateway to the Connected Life: DOCSIS 3.0
- DOCSIS 3.0 helps operators address the current network speed limitations by enabling them to increase upstream and downstream speeds to 120 Mbps and 160 Mbps, respectively. To achieve these ultra-high speeds and help cable operators deliver more content over their existing networks, DOCSIS 3.0-compliant channel-bonding technology from Cisco uses multiple...
- White papers 2008-12-19
- Comcast to debut 50Mbps Internet in Chicago, Baltimore, Atlanta (updated)
- Comcast says it will debut its new ultra-high-speed Internet service in the Chicago, Baltimore, Atlanta, and Fort Wayne, Ind. markets, according to the Associated Press. The Philadelphia-based company says the next-generation Docsis 3.0, or Data Over Cable Service Interface Specification 3.0, technology will include some of the...
- Blog posts 2008-12-11
- WiMax service rolls out; Who's buying?
- WiMax service rolls out; Who's buying?Bring it on! I'll biteIn the Baltimore Washington area we have one maybe two choices for broadband access if you are lucky. The more competition the better. I'll drop Comcast broadband in a heart beat for WiMax. I'll stay if the service is...
- Discussion threads 2008-09-30
- 100Mbps. 2010. Over The Air. Don't Be Surprised.
- What if WiFi could square off or even beat WiMax or other approaches to broadband access to the Internet, over the air? If you listen to comments from Tom Rutledge, the chief operating officer of Cablevision Systems Corp., at the Merrill Lynch...
- Blog posts 2008-09-11
- Qwest CTO on FTTP, bandwidth caps and integrated services
- Qwest plans to roll out integrated home services where it ties its services in with those from its partners such as MSN and DirecTV in a move enabled by a thin layer of software, according to Qwest CTO Pieter Poll. Poll right talked about Qwest's broadband strategy...
- Blog posts 2008-08-25
- FCC issues 'radical' order re: Comcast
- FCC issues 'radical' order re: ComcastInstead of throttling ...... the ISPs could monitor the average bandwidth per month up and down per user. The billing could be done on a bandwidth basis ... If one user is using a lot more bandwidth, then their bill will be a...
- Discussion threads 2008-08-21
- FCC boss: Comcast blocking is widespread
- FCC boss: Comcast blocking is widespreadThis is really no supriseFor anyone who knows Comcrap they should have known this. and FINALLY a FCC investigation shead light on it. Comcrap needs to be hit with a HUGE fine so no other ISP resorts to the methods of blocking internet protocols and...
- Discussion threads 2008-04-22
- Comcast's true speeds and the BitTorrent deal
- So, I talked to former ZD technical director and editor at large George Ou last week. He's been looking at Comcast's claims for its DOCSIS 3.0 rollout in Minneapolis. I passed along Comcast's projections that the service would 50 Mbps downstream and 5 Mbps up. ...
- Blog posts 2008-04-09
- Comcast promises protocol-agnostic throttling
- News.com's Declan McCullagh has an interview with Joe Waz, Comcast's SVP for external affairs head PR honcho, about the surprising news that the cable company is talking to BitTorrent about ways to work together to fix the problem of P2P apps sucking up everyone's bandwidth. Photo by Declan The...
- Blog posts 2008-03-27
Neighboring Terms
Premier Vendor Content Whitepapers, webcasts & resources from our Power Center Sponsors
- Reduce risk. Reduce complexity. Increase reliability.
-
A simplified IT environment isn't just less complex. It's also more reliable. Standardize on a single Linux platform with SUSE Linux Enterprise from Novell, and get the world's most interoperable Linux
- Learn more >>
- Microsoft Dynamics CRM Online - Free Six-Month Trial for Eligible Organizations
-
Microsoft Dynamics CRM Online provides fast online access, simple contact management and better sales performance for a low monthly cost - the best value on the market today.
- Learn more about the free, six-month trial offer>>
- Keep Up With The Latest In Document Management with The DocuMentor.
-
Doc delivers the scoop on today's enterprise content management, printer maintenance, and all other issues related to document management. It's the DocuMentor Blog.
- Learn more >>
SmartPlanet
- Thought-provoking progressive ideas on diverse topics that intersect with technology, business, and life, and matter to the world at large. Visit SmartPlanet
- More from IBM
-
- How to Drive Better Business Outcomes with Exceptional Web Experiences Download the eBook
- Driving Business Agility through SOA Connectivity & Integration Read the White Paper from IBM
- Linking Decisions and Information for Organizational Performance Read the Tom Davenport study
