In addition, the transport layer allows IMS devices to make and receive calls to and from the PSTN network or other circuit-switched networks via the PSTN gateway.
此外，传输层允许IMS设备通过PSTN网关呼叫PSTN网络或其他电路交换网络和接收来自这些网络的呼叫。
In a circuit-switched network when you use a circuit, you have the full circuit for the time that you are using the circuit without competition from other users.
在电路交换网络中使用电路时，您在使用该电路的时间内将拥有整个电路，不会与其他用户争用。
Dynamic routing technology of circuit-switched network is critical to bring non-hierarchical network into full services and improve the grade of service eventually.
无级电话网动态路由技术是充分利用现有设备、提高服务质量的关键技术。
Therefore, this method can be used for the optimal design of circuit-switched network.
因此，这一方法非常适合于电路交换网的优化设计。
Therefore, this method can be used for the optimal design of circuit-switched network.
因此，这一方法非常适合于电路交换网的优化设计。
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