INCOMING PROCESSING SYSTEM OF COMMUNICATIONS LINE

PURPOSE:To enable evasion of line error acquisition by a terminal other than a terminal having initially performed a line selecting operation by keeping an operated terminal performing an incoming display until a line acquiring operation is performed, and by causing other terminals to disappear an IC display when the line selecting operation is performed with respect to an incoming display. CONSTITUTION:When a line selecting operation is performed, where a line wire button (EX1 button) corresponding to a line wire CO1 of its operating KB is pressed to respond the incoming signal to the line wire CO1 by a telephone TEL1, with respect to the incoming signal, a data processing part PP reads line selecting operation information, and transfers the line selection data and the line number data ''#1'' from said TEL1 through its interface part IF to a main device ME, thus transferring the incoming stop data to all telephones TEL2- TELn other than the TEL1 through extension circuit parts LC2-LCn so as to stop the incoming display.