基站控制器CS流程详细说明。依照GSM 3GPP协议，制定电路交换语音通话信令流程。此文档是某通信公司内部文档，文中重要部分已经用亮光标出。此文档适合精读。-CS processes the base station controller in detail. GSM 3GPP in accordance with the agreement, the development of circuit-switched voice call signaling process. This docum