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The services provided by ISDN(a) Bearer service(b) Teleservice(c) Secondary service(d) All of the mentionedThe 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

Answer» 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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