Cable Internet: Network Operators Demonstrate Gigabit Bandwidths Using Docsis 4.0

A research consortium supported by international cable network operators has demonstrated a data rate of 8.9 Gbit / s via the upcoming Docsis 4.0 transmission standard in the United States. The modem prototypes were used in the “10G Showcase”, co-created with US network operators Comcast and Charter Communications.

The system configured for demonstration purposes with a prototype modem achieved transmission speeds of 8.9 gigabits per second downstream and 6.2 gigabits per second upstream. According to the media, Comcast and Charter showed different approaches to connections, which, however, achieved similar transmission speeds.

Docsis (Data Over Cable Service Interface Specification) was introduced in 1998 as a global standard. Thanks to full duplex, Docsis 4.0 should allow more transmissions in the same frequency spectrum. This allows you to use the upload and download channels at the same time, allowing for faster uploading. In previous standards, uploading and downloading are very far apart. The new standard also provides for lower latencies.

In Germany, cable network operators such as Vodafone are currently extending the Docsis 3.1 transmission standard. The goal is to provide 25 million households with gigabit connections this year, Vodafone announced. In this way, 10 Gbit / s in download and 1 Gbit / s in upload would be possible, much more than what is currently offered in the rates. Cable network operators are therefore in no rush to introduce Docsis 4.0.

In addition to the end devices, changes should also be made to network layer 3 for the new standard – in the regional fiber-optic cable network – since Docsis4.0 uses an extended frequency spectrum of up to 1.8 gigahertz.


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