after payment type public telephone
public switched telephone network {= PSTN}
public switched tele-phone network
public switched telephone network
公用交换电话网
公共交换电话网路
公用电话网
公共电话交换网
固定电话网络
公用交换电话网络
电话公网
电话网
公用电话网络
public switched network
Public Switched Data Network PSDN
public switched data network {= PSDN}
Public Switch Telephone Network
public service telecommunication network
Public Security Network
public power supply network
public packet-switched network
public packet switched network