Term Definition

This glossary has been prepared to help our readers understand common acronyms and terms used in the telecommunications sector.

 

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SDH Synchronous Digital Hierarchy; standard technology for synchronous data transmission on optical media, where the bits from one call are carried within one transmission frame.

 

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SIM card Subscriber Identification Module card; an electronic chip card that is inserted into a handset and identifies the subscriber to the network.

 

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SMS Short Message Service; a service which enables cellular telephone users to send and receive text messages on their handsets.

 

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Special Drawing Rights A monetary unit whose value reflects a basked of major currencies, with the U.S. dollar comprising majority of the basket.

 

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Switch A device that selects the paths or circuits to be used for transmission of information and establishes a connection; switching is the process of interconnecting circuits to form a transmission path between users and capturing information for billing purposes.

 

Recognizing the Importance of Good Governance