Patent ID: 6031902
Filing Date: 2000-02-29
Classification: H04M

Abstract:
A dealing communication system having a public line trunk connected to the public line, a communication board line circuit connected to a communication board, and a line control unit for accommodating and connecting the public line trunk and the communication board line circuit;wherein the communication board has a key display means for displaying the line key with an one-touch operation instructing a transmission operation for executing an outgoing call to the particular line or a reception operation for receiving an incoming call, and a simultaneous all together transmission key instructing a simultaneous all together transmission operation of all lines of the line group previously stored by an one-touch operation,a hands-set for carrying out a communication, and a control means for executing the simultaneous all transmission operation to all lines of the line group in response to the one-touch operation of the simultaneous all together transmission key displayed on the key display means and being able to execute the simultaneous all together transmission to all lines of the line group through the hands-set.