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The services provided by ISDN

(a) Bearer service

(b) Teleservice

(c) Secondary service

(d) All of the mentioned

The question was asked by my school principal while I was bunking the class.

This interesting question is from ISDN and Interface topic in division Digital Communication of Digital Communications

1 Answer

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Right answer is (d) All of the mentioned

Easy explanation: The services provided by ISDN and classified by attributes are bearer service, teleservice and secondary service.

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