在电信中心办公室和交换中心安装工机电，模拟和数字集群系统，电路和设备。
Install electromechanical, analog and digital trunking systems, circuits and equipment in telecommunications central offices and switching centres.
本建议包括国际交换中心(isc)和其有关的电路倍增设备之间的信令原则和示例。
This Recommendation contains the principles and examples of Signalling between the International Switching Centres (ISC) and their associated circuit multiplication equipments.
本建议包括国际交换中心(isc)和其有关的电路倍增设备之间的信令原则和示例。
This Recommendation contains the principles and examples of Signalling between the International Switching Centres (ISC) and their associated circuit multiplication equipments.
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