Telephone exchange
A telephone exchange, telephone switch, or central office is the telecommunications system in the PSTN or in big business. It interconnects digital...
A telephone exchange, telephone switch, or central office is the telecommunications system in the PSTN or in big business. It interconnects digital...
Telecommunications is the transmission by cable, radio, optical, or other electromagnetic systems of different forms of technology. It...
Voice over Internet Protocol (VoIP), often known as IP telephony, is a method and set of technologies that allows voice conversations and multimedia...