Communication terminal apparatus and control method with party identification features

摘要

A communication terminal apparatus connected to an integrated services digital network to transmit data from an outgoing call office to an incoming call office and a method of controlling the communication terminal apparatus, in which notification of a person to be called for an incoming signal and acceptance or rejection of the incoming signal are controlled on the basis of predetermined identification data contained in the incoming signal. When detecting the identification data contained in the incoming signal, the present apparatus compares the detected identification data with registration identification data previously registered so that, if the apparatus finds a coincidence therebetween, it informs the user of data coresponding to the coincided identification data visually by character data or audibly by a sound. If the apparatus fails to find a coincidence therebetween then it rejects the acception of the incoming signal containing this identification data, while if it finds a coincidence then it grants the acceptance of the incoming signal containing the coincided identification data.