一、 索引和概述 21.101 Specifications and Reports of 3G 21.905 Vocabulary for 3GPP Specifications 23.002 UMTS network arthitecture 23.003 Numbering, addressing and identification 23.008 Organization of subscriber data 23.121 Evolution of the GSM platform.

佳的美 MMI接口定义图适合没有MMI线的朋友