Abstract: A dealing communication terminal apparatus of a pagination type is enabled to accommodate at least one communication terminal apparatus, public lines and private lines and to connect exchangingly them. The communication terminal apparatus 300 comprises a color display device 101 for displaying the names of lines, auto dial other property, and functions, a line key panel 102 laminated on the display device 101 and provided with button portions opposite to the line name indication portion of the display device 101, and a main control device 303 and a display control device 304 exchangingly for displaying a plurality of line button accommodation screens or function button accommodation screens in the display device 101 by operations of the fixed function buttons 103A, 103B, each provided in the communication terminal apparatus.

Abstract: A telephone terminal has a large size display indicating a telephone operation display of a touch panel system and it is used, for example, in a dealing speech system of financial organizations and the like. The telephone terminal has telephone operation indication functions which control the large display, as well as a master controller for controlling the display depicting telephone operation indications (pagination keys) and a slave controller for controlling the handlings concerning communication functions in order to obtain improved communication functions of the telephone terminal proper. These of the master controller and slave controller are cooperatively functioned to control these telephone indication functions and communication functions.