METHOD AND APPARATUS FOR VOICE/DATA COMMUNICATION IN ORGANIZATION BY DEDICATED POWER SOURCE NETWORK

摘要

PURPOSE: To provide a method and a device of in-organization voice and data communication by an exclusive power source. CONSTITUTION: Two channels are used for voice transmission and data transmission, the voice transmission is executed by frequency modulation, and the data transmission, especially, dial information transmission is applied by pulse modulation. A caller transmits a digital electric signal including necessary information such as a source dress, a destination address and action and a callee responds to it with an affirmative response electric signal and therefore, a handshake procedure is adopted. An exclusive power source circuit network indicates a bus having two channels and the assignment follows a specific organization structure during access to the circuit network. Thus, direct connection between two users can be attached, an in-organization communication circuit network can be constructed with a simple way without necessitating any central switchboard, and connection between an outside public telephone network and the in-organization communication circuit network can be attained.