PSTN Public switched telephone network
Public Switch Telephone Network
public switched telephone network
电话公网
电话网
公用电话网络
公用电话网
公共电话交换网
公用交换电话网
固定电话网络
公共交换电话网路
公用交换电话网络
public switched tele-phone network
public switched telephone network {= PSTN}
public switching telephone network
Private Network Public Network
after payment type public telephone
dissemination model of network public sentiment
LNPN Lotus Notes for Public Network
Navigation-aids Public Network System
Network Public Information
network public sentiment
NTT Nippon Telegraph and Telephone Public Corporation
pre-pay public telephone
Public network coverage