Which of the following comes under supplementary ISDN services?
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Which of the following comes under supplementary ISDN services? Explanation: Supplementary ISDN services are digital in nature. They include call diversion, closed user groups, and caller identification, and are not available in analog mobile networks. Supplementary services also include short messaging service (SMS).
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supplementary ISDN service are digital in nature.they include call diversion,closed user group,and caller identification ,and are not available in analog mobile networks.supplementary services also include short messaging service (SMS).
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