Synchronizing control switching system

Abstract

Abstract PURPOSE:To select and use automatically a corresponding synchronizing system transmission/reception circuit by providing the transmission/reception circuit of the character synchronizing system and the frame synchronizing system to one data communication equipment so as to check a transmission signal from an opposite device. CONSTITUTION:A communication signal inputted via a communication line 8 is converted into a digital bit stream by a MODEM 1 in a data communication equipment provided with a character synchronizing transmission/reception circuit 5 and a frame synchronizing transmission/reception circuit 6. When each circuit is initialized via a carrier reception signal CD in a reception signal, a communication signal converted into the bit stream is inputted to a synchronizing code detection circuit 3 via a shift register 2 and compared with a synchronizing code in the circuit 3. As a result, when they are coincident, the circuit 3 outputs a synchronizing code detection output (an output representing the character synchronization or the frame synchronization) to a synchronizing system command register 4 and the register 4 makes a reception circuit corresponding to the output effective. Thus, the transmission/reception circuit of the corresponding synchronizing system is selected and used automatically.

Inventors

• 👤 Takashi Nagata
• 👤 隆 永田

Bibliographic Details