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Channel is separate path.
And Carrier is basically a medium which carry data.

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Posted by fawad

Channel is a stand alone path.

One channel can contain multiple carriers.

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Posted by waqqas1

In telecommunication Channel term is used means the portion assign to user
Carrier is the waveguide which carry our data on wireless or wired

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Posted by HamidAliKhan

For channel

http://searchdatacenter.techtarget.com/sDefinition/0,,sid80_gci211770,00.html

For carrier

http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci211747,00.html

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Posted by Hash007

Carrier:

In telecommunications, a carrier wave, or carrier is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information,for example voice or data, to be transmitted, for example by radio or light.

Channel:
In telecommunications in general, a channel is a separate path through which signals can flow.

From Wikipedia.org

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Posted by sagitraz