administration telephone network
Cellular mobile telephone network
Dedicated telephone network
Digital Telephone Network
Digital Telephone Network DTN
Fixed Telephone Network
GSTN General Switched Telephone Network
inland telephone network
leased line telephone network
Local telephone network
Multi-Tandem Telephone Network
packet switching telephone network
private switched telephone network
private telephone network
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 telephone network {= PSTN}