digital carrier telephone terminal machine

public switching telephone network

Public Telephone Network

radio telephone network

rural telephone network

special telephone network

switched telephone network

Telephone Exchange Network

telephone intelligentized network system

telephone management network

telephone network

Telephone Network Annunciate

telephone network central offices

telephone network line

Telephone Switching Network

public switched telephone network {= PSTN}

telephone switching network of railway

telephone type network

TN Telephone Network