The headend is the electronic control center of a cable or broadband coaxial network where incoming signals are amplified, converted, processed, and combined for transmission to customers. The headend usually includes antennas, preamplifiers, frequency converters, demodulators, modulators, processors, and other related equipment.
"Typically, one or two channels are assigned for downstream traffic from the headend to the customer, and one channel is reserved for upstream traffic from the customer to the headend. If a cable network providing Internet access has not upgraded its facilities to allow two-way services, a telephone line is used for upstream traffic.
- ↑ Telecommunications: Technological and Regulatory Factors Affecting Consumer Choice of Internet Providers, at 17 v.16.
- "Definition" section: ATIS Telecom Glossary (2007).