High Speed Data (HSD) systems, which uses the DOCSIS standard, make possible the provision of modern, interactive, multimedia services in CATV networks, including: fast access to the Internet and Intranet resources, data transmission with guaranteed parameters, corporation networks: VPN, teleconferences, IP services, Audio / Video on Demand, On-line - games
The DOCSIS architecture consists of two primary components.
1) A cable modem located with the customer and,
2) the cable modem termination system operated by cable service providers. The second function is to perform as a Hi Speed way station for multiple cable modems and then communicate with the system network. DOCSIS defines protocol for bi-directional signal exchange between these two components through the use of cable.
source: tech-faq
More about DOCSIS 3.0 you will find at VECTOR website.
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