And simply review the forming process and evolving history of A interface in CDMA system, then describes and analyses the interface between MSC and BSC defined in 3GGPP2 S.00001-A.

• 本文简单回顾了CDMA系统A接口的形成过程及标准版本演进历史，然后对3GPP2 S.；00001-A协议所定义的标准MSC与BSC接口概念做了一些概括介绍和简单分析。