In 1997, released the very first version of Data Over Cable Service Interface Specification (DOCSIS ® technology) that enabled broadband internet service over Hybrid Fiber-Coaxial (HFC) networks. Ever since, we’ve been making improvements, greatly enhancing network speed, capacity, latency, reliability and security with every new version. Today, cable operators use DOCSIS 3.1 technologies to make 1 Gbps cable broadband services available to 80% of U.S. homes, easily enabling 4K video, seamless multi-player online gaming, video conferencing and much more. Although there is still a significant runway for DOCSIS 3.1, has been hard at work developing the next version – DOCSIS 4.0, which was officially released in March of 2020 and further advances the performance of HFC networks. Let’s take a look.
First, let’s talk about upstream speeds. DOCSIS 4.0 technology will quadruple the upstream capacity of HFC network to 6 Gbps—compared to the 1.5 Gbps that is available with DOCSIS 3.1. While current cable customers still download significantly more data than they upload, upstream data usage is on the rise. In the near future, advanced video collaboration tools, VR and more, will require even more upstream capacity. DOCSIS 4.0 also provides more options for operators to increase downstream speeds, with up to 10 Gbps of capacity. It has been designed to support the widespread availability of symmetric multigigabit speed tiers through full-duplex and extended-spectrum technologies that move us closer to our 10G goal.
In addition to faster speeds, DOCSIS 4.0 will also deliver stronger network security through enhanced authentication and encryption capabilities and more reliability due to the Proactive Network Maintenance (PNM) improvements. It is a great leap toward 10G, setting the stage for a series of subsequent enhancements that will all work together to help us build the future that we always dreamed of.
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I recently purchased a cable modem which is advertising two different numbers. I didn't notice that it had two different numbers until my Internet speed test results were horrendous. Can anyone tell me the difference between docsis 3.0 speed and internet plan speed.
The manufacturer's web page for the product also confirms a maximum speed of 343Mbps when it gets to us 8 download channels.
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The Internet Plan Speed is what you chose when you signed up for service with that provider (Comcast? Your linked photo #1 suggests Comcast may be your provider). Different providers, different areas; different maximum speeds.
You might have signed up for 10Mbps, 100Mbps, 1000Mbps... if those speeds are available in your area. Most cable companies do not offer you everything the (2006 design DOCSIS 3.0) hardware can do (much less DOCSIS 3.1), because they haven't invested in the fiber optic infrastructure to let everyone run at maximum speed.
Your table showing Extreme/Ultimate will cost more than the Economy/Performance plan, but delivers nearly 3x the throughput IF there are 24 download and 8 upload channels (yeah, the 6MHz wide channels also used for cable TV) available where you are. Sometimes there are channels open, sometimes, there are not, because it Costs Big Money to buy right-of-way privileges, dig ditches, lay cable, document everything, and make the connections.
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Comcast, in theory, has at least one home in 80% of its markets on DOCSIS 3.1, a significantly better standard. Doesn't mean they have it in your market, doesn't mean that even if they do have it in your market, that the cable infrastructure where you are allows DOCSIS 3.1 speeds.
There's a very nice paper from MIT which, although 23 years old (back when ISDN was Hot Stuff) which introduces some basic concepts.
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Comcast, in theory, has at least one home in 80% of its markets on DOCSIS 3.1, a significantly better standard. Doesn't mean they have it in your market, doesn't mean that even if they do have it in your market, that the cable infrastructure where you are allows DOCSIS 3.1 speeds.
There's a very nice paper from MIT which, although 23 years old (back when ISDN was Hot Stuff) which introduces some basic concepts.
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