(
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.