其中移动交换机在核心网中又占据了最核心的位置，它主要负责通信管理功能，即呼叫处理功能。
And the MSC(Mobile Switch Center) plays a very crucial role in it, with its main responsibility is to do the communication management.
固定-移动电话系统可以让移动电话通话经由公司内部的中央电话交换机来连接，这样可以大大减少打电话的支出，尤其是国际电话。
Some FMC systems, for example, allow calls from mobile phones to be routed through a company's central switchboard. This makes outgoing calls, particularly international ones, much cheaper.
在蜂窝单元指派交换机时定义了一系列应用于初始解的移动，以改进费用和建立解的可行性。
This approach defines a series of moves applicable to an initial solution in order to improve the cost and establish the feasibility of the solution.
本文介绍的就是7号信令在西门子移动d 900交换机的应用。
This thesis is about the CCS7 applications at Siemens D900 switch mobile.
西门子移动d 900交换机是基于传统2g网络的交换机，符合7号信令规范，在我国有着非常广泛的应用。
Siemens Mobile Switch D900 is based on traditional 2g networks, accord to CCS7 standards, has a very wide range of applications in our country.
然后介绍了西门子移动d 900交换机的硬件和7号信令如何在西门子移动d 900交换机上实现。
Then introduces the Siemens Mobile Switch D900 hardware and how CCS7 comply at the Siemens Mobile Switch D900 platform.
然后介绍了西门子移动d 900交换机的硬件和7号信令如何在西门子移动d 900交换机上实现。
Then introduces the Siemens Mobile Switch D900 hardware and how CCS7 comply at the Siemens Mobile Switch D900 platform.
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