In information technology, the term channel is used in a number of ways.
By submitting your email address, you agree to receive emails regarding relevant topic offers from TechTarget and its partners. You can withdraw your consent at any time. Contact TechTarget at 275 Grove Street, Newton, MA.
1) In telecommunications in general, a channel is a separate path through which signals can flow.
2) In the public switched telephone network (PSTN), a channel is one of multiple transmission paths within a single link between network points. For example, the commonly used (in North America) T-carrier system line service provides 24 64 Kbps channels for digital data transmission.
3) In radio and television, a channel is a separate incoming signal or program source that a user can select.
4) In optical fiber transmission using dense wavelength-division multiplexing (DWDM), a channel is a separate wavelength of light within a combined, multiplexed light stream.
5) On the World Wide Web, a channel is a preselected Web site that can automatically send updated information for immediate display or viewing on request. See push technology.
6) In computer and Internet marketing, a channel is a "middleman" between a product creator and the marketplace. Value-added resellers (VAR) and retail store chains are examples of channels in this context.
7) Using Internet Relay Chat, a channel is a specific chat group.
8) In IBM mainframe systems, a channel is a high bandwidth connection between a processor and other processors, workstations, printers, and storage devices within a relatively close proximity. It's also called a local connection as opposed to a remote (or telecommunication) connection.
9) In a field-effect transistor (FET), a channel is the semiconductor path on which current flows.