Docsis how does it work

Therefore the value for a particular user varies widely. The third version, for the first time, allowed uniting channels on a cable modem. With the help of this function, it is possible to obtain higher speed values. This standard provides quite a high speed, and if you look ahead, with the introduction of another correction, you can receive and send data equally fast, and the technology will compete with the fiber.

However, deploying new coaxial networks is expensive, plus the real speed for the user with other types of connections is higher. On the other hand, in sparsely populated areas with private households, it will be even more expensive to deploy fiber. If you have coaxial cables, it is much cheaper to connect users to the internet through them. Even version 3. Learn why is my fiber-optic internet slow? There are many options for the equipment that fits this type of connection.

The choice depends on the manufacturer, additional features, and a suitable price category. The offers include two-in-one devices — cable modem and WiFi. One of the most popular manufacturers of such equipment is Netgear. It provides quick access to the network. But other manufacturers are not inferior in quality. When choosing equipment, consult with your operator.

Save my name, email, and website in this browser for the next time I comment. Table of Contents. The Difference between Docsis 4. Despite this, the vast amounts of subscriber devices and cable modems in the industry still pose a serious issue to ISPs Internet Service Providers.

As a result, attempting to manage so many devices —which are usually incompatible— without an efficient solution is a big issue for small-scale and large-scale enterprises. AVSystem is a management software provider that can solve the issue of handling DOCSIS mechanisms and successfully integrating them with other technologies. It even offers an adaptable procedure for the auto-discovery of newer CPEs.

Already available DOCSIS-enabled devices are monitored with a management protocol that allows further operations like reboots and firmware upgrades. All in all, DOCSIS is an excellent method of accessing the internet, and it makes use of standard equipment like cable television channels. Last updated on June 15, By Andreas Grant. Was this post helpful?

Let us know if you liked the post. Of course the story doesn't start at megabits per second. The earliest attempts to provide broadband service over the cable take the word "broad" with a grain of salt here was using one-way systems where the return path was over a phone line. One of the first true cable broadband systems was developed by LANcity.

Traditional 10 Mbps Ethernet also uses coaxial cable, just like cable TV actually the cable has slightly different specifications.

A coax cable consists of an inner wire wrapped within an insulator which is in turn surrounded by an outer conductor. So the inner wire is protected against electromagnetic interference from the outside, and the outer conductor is grounded so it's not susceptible to interference, either.

This makes it possible to use the same TV channels for cable that are also used for broadcast over the air within reason, because, in practice, the shielding isn't perfect. The big difference between Ethernet over coax and data over the TV cable is that Ethernet puts voltages directly on the cable. The way in which the voltages transition makes up the 0 and 1 bits. This straightforward mode of operation is called "baseband" transmission—hence the name 10BASE2 10 Mbps baseband transmission over almost meters.

Baseband transmission is simple to implement, but has the downside that there can only be one signal at a time on the wire. So with multiple systems connected to the same wire, the systems have to take turns transmitting data by waiting until the wire is idle.

When two Ethernet systems accidentally start to transmit at the same time, they each notice the other's transmission, declare a "collision," and retry a little later. On a cable network, things are done somewhat differently. In order to coexist with the TV and radio broadcasts living on the same cable, the digital signals are modulated into 6 MHz channels or 8 MHz in many places around the world , just like TV channels.

In the downstream direction from the cable operator to the user , the digital information is carried on an unused TV channel. The tricky part is the upstream direction, from the user to the cable operator. Fortunately, in the past, cable networks have been outfitted with limited capacity in the upstream direction, sometimes called the "subband. Frequencies from 5 to 42 or 65 MHz are used for return traffic, while higher frequencies, up to as high as 1 GHz, are used for broadcast and downstream traffic.

So now we have high-bandwidth and a bi-directional infrastructure. This leaves just one problem: the fact that multiple users are connected to the same cable.

In the downstream direction, this isn't a huge problem.