所述电路交换域适配器保持所述与第二方建立呼叫分支；
The call control function in the circuit exchange is given up.
未来WCDMA无线网上承载的是包括电路交换域（CS）和分组交换域（PS）的混合业务，因此WCDMA无线网规划的质量高低与混合业务测算的方法直接相关。
The WCDMA wireless network will carry hybrid services of CS and PS. The calculation method of hybrid services capacity directly relates to the network planning result.
目前移动通信网络主要由电路交换(CS)域，分组交换(PS)域和IP多媒体子系统(IMS)域三个部分构成。
At present, the mobile communication network is mainly divided into three domains which are circuit-switching (CS) domain, packet switching (PS) domain, and IP Multimedia Subsystem (IMS) domain.
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