The present invention relates to a device for adding a DSS (Direct Station Selector) to a key telephone system that maximizes efficiency according to the use of an extension of a master key by not allocating a separate extension line to an extended DSS .;In order to achieve the above object, according to the present invention, there is provided a mobile communication terminal comprising: a key telephone main body 10 connected to an extension to recognize a type of a terminal, controlling a state of a connected terminal by data communication, A key telephone 20 for allowing a user to make a voice call with the other party and a power supply connected to the power generator 22 of the key telephone 20 to receive power, Analyzing and processing data transmitted from the central processing unit 23 by being connected to the processing unit 23 by a connector and generating data to be transmitted to the keyphone main unit 10 and transmitting the data to the keyphone telephone 20 (DSS) 30 having a device 31 as shown in FIG.
展开▼
