说明：  cpri协议的中文版本，最新版本 CPRI协议由爱立信、华为、NEC、北电和西门子五个厂家联合发起制定
(CPRI agreement the Chinese version, the latest version of CPRI agreement by Ericsson, Huawei, NEC, Nortel and Siemens jointly initiated the development of the five manufacturers)