Editing Communication channel (section)

==Examples==
Examples of communications channels include:

# A connection between initiating and terminating [[communication endpoint]]s of a [[telecommunication circuit]].
# A single path provided by a [[transmission medium]] via either
#* physical separation, such as by multipair [[Electrical cable|cable]] or
#* separation, such as by [[Frequency-division multiplexing|frequency-division]] or [[time-division multiplexing]].
# A path for conveying electrical or electromagnetic signals, usually distinguished from other parallel paths.
#* A [[data storage device]] which can communicate a message over time.<ref name="madhow2014introduction">{{cite book| title=Introduction to Communication Systems |author=Madhow, U. |isbn=9781316060865 |url=https://books.google.com/books?id=XoBIBQAAQBAJ |date=2014 |publisher=Cambridge University Press |page=1}}</ref>
#* The portion of a storage medium, such as a [[Track (disk drive)|track]] or band, that is accessible to a given reading or writing station or head.
#* A buffer from which messages can be ''put'' and ''got''.
# In a [[communications system]], the physical or logical link that connects a data source to a data sink.
# A specific [[radio frequency]], pair or band of frequencies, usually named with a letter, number, or codeword, and often allocated by international agreement, for example:
#* [[Marine VHF radio]] uses some 88 channels in the VHF band for two-way FM voice communication. [[Channel 16 VHF|Channel 16]], for example, is 156.800&nbsp;MHz. In the US, seven additional channels, WX1 - WX7, are allocated for weather broadcasts.
#* [[Television channels]] such as North American TV Channel 2 at 55.25&nbsp;MHz, Channel 13 at 211.25&nbsp;MHz. Each channel is 6&nbsp;MHz wide.  This was based on the bandwidth required by [[analog television]] signals.  Since 2006, television broadcasting has switched to digital modulation ([[digital television]]) which uses [[image compression]] to transmit a television signal in a much smaller bandwidth, so each of these ''physical channels'' has been divided into multiple  ''[[virtual channel]]s'' each carrying a DTV channel.
#* Original [[Wi-Fi]] uses 13 channels in the [[ISM band]]s from 2412&nbsp;MHz to 2484&nbsp;MHz in 5&nbsp;MHz steps.
#* The radio channel between an [[amateur radio repeater]] and an [[amateur radio operator]] uses two frequencies often 600&nbsp;kHz (0.6&nbsp;MHz) apart. For example, a repeater that transmits on 146.94&nbsp;MHz typically listens for a ham transmitting on 146.34&nbsp;MHz.

All of these communication channels share the property that they transfer information. The information is carried through the channel by a [[signal]].