电路交换公用数据网络
circuit switched public data network
分组交换公用数据网
Packet Switched Public Data Network PSPDN
分封交换式公用数据网络
packet switched public data network
公用电路交换数据网
Circuit Switched Public Data Network CSPDN
公众分封交换数据网络
public package switch information network
PPSIN
公众交换数据网络
public switched data network {= PSDN
电路交换数据网
circuit switched data network
电路交换数据网络
CSAcircuit switched data network
分封交换数据网络
packet switching data network
proxy cachepacket switched data network
proportional plus integral plus derivative controlpacket switched data network
PSDN
packet switched data network
高速数据交换网络
high speed switched data network
综合数据交换网
integrated switched digital network