business telephone system is a telephone system typically used in business environments, encompassing the range of technology from the key telephone system...

Telephone System is a business telephone system developed and distributed by the Western Electric Company for the Bell System. The 1A2 Key Telephone System...

Plain Old Telephone Service (POTS), or Plain Ordinary Telephone System, is a retronym for voice-grade telephone service employing analog signal transmission...

telecommunications systems. It facilitates the interconnection of telephone subscriber lines or digital system virtual circuits, enabling telephone calls between...

memorized. A telephone number serves as an address for switching telephone calls using a system of destination code routing. Telephone numbers are entered...

A telephone keypad is a keypad installed on a push-button telephone or similar telecommunication device for dialing a telephone number. It was standardized...

ISDN, and other telephone systems. TAPI is used primarily to control either modems or, more recently, to control business telephone system (PBX) handsets...

The Bell System was a system of telecommunication companies, led by the Bell Telephone Company and later by the American Telephone and Telegraph Company...

ExecuTech System 2000 Make an intercom call. At the busy signal, dial "*6". Hang up. When the desired extension becomes idle, the calling telephone receives...

and became rapidly indispensable in business, government, and in households. The essential elements of a telephone are a microphone (transmitter) to speak...