Cable Data Network
Architecture
To offer high-speed Internet
services, a cable operator creates a data network that operates over its
hybrid fibre/coax (HFC) plant. The following diagram provides a high-level
look at a typical large market cable network, including a regional cable
headend (typically serving 200,000 to 400,000 homes), which feed
distribution hubs(each serving 20,000 to 40,000 homes) through a
metropolitan fibre ring. At the distribution hub,signals are modulated onto
analogue carriers and then transported over fibre-optic lines to nodes
serving 500 to 1,000 homes. From the node, these signals are carried via
coaxial cable to a home or business. |
