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Which of the following comes under supplementary ISDN services?(a) Emergency calling(b) Packet switched protocols(c) Call diversion(d) Standard mobile telephonyI have been asked this question in quiz.My question is taken from Global System for Mobile (GSM) topic in section Wireless Systems and Standards of Wireless/Mobile

Answer»

The CORRECT answer is (c) Call diversion

To explain: 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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