A CDE Definition
(Customized Application of Mobile network Enhanced Logic) A set of ETSI standards for extending landline intelligent network (IN) telephony services to the data services of GSM, GPRS and UMTS mobile systems. CAMEL functions were added in phases. Phase 1 covers basic features such as call waiting and forwarding. Phase 2 supports prepaid calling and unstructured supplementary service data (see USSD). Phase 3 supports roaming; Phase 4 adds multimedia services, and Phase 5 provides seamless prepaid roaming. See CAP.
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