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Information bearing channels in ISDN are called ______

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Information bearing channels in ISDN are called ______

(a) D channels

(b) Data channels

(c) B channels

(d) Voice channels

This question was posed to me in class test.

My enquiry is from Integrated Services Digital Network (ISDN) topic in division Wireless Networking of Wireless/Mobile

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Correct answer is (c) B channels

For explanation I would say: The ISDN interface is divided into three different types of channels. Information bearing channels called bearer channels (B channels) are used exclusively for end user traffic (voice, data and video).

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