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
Large Telephone Traffic Simulation
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