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介绍了爱立信CDMA系统从现有IS－95 向完全分层的第三代解决方案演进的道路上所采取的全面且灵活的5个步骤，重点介绍了与IS－95 CDMA系统发展有密切关系的网元。
Introduced the comprehensive and flexible five steps Ericsson CDMA system evolved from the existing IS-95 to a fully layered third-generation solution, highlighting the close relationship with the development of the IS-95 CDMA system Network element.