Abstract: A combined terminal is made by combination of first and second terminals. The first terminal has a first plate portion. The second terminal has a second plate portion and a window portion formed in the second plate portion. The first and second terminals are combined so that the first and second plate portions are superposed while the first terminal remains to be linked to a frame by a link portion therebetween. The combined first and second terminals are removed from the frame by cutting the link portion through the window portion.

Abstract: A female terminal fitting includes a bottom plate which extends in a front-back direction, a female electrical contact portion formed on a front side of the bottom plate, a board connecting portion extending backward of the bottom plate, and a stress relaxation portion. The bottom plate has a first stress relaxation portion which is resiliently deformable in an up-down direction. A side wall is erected from and formed on at least one side portion of the bottom plate in a right-left direction. A connecting portion connects to the board connecting portion in a state that the board connecting portion is arranged so as to be parallel to the front-back direction and is located more inside than the side wall. The connecting portion is a second stress relaxation portion which is resiliently deformable in the right-left direction and in the front-back direction.

Abstract: In a communication system of a key telephone system wherein a key telephone selected by electric power supplied from a key service unit is started through a signal line for performing an independent calling, the key service unit is provided with a voice switch adapted to switch between transmission and reception of speech, each key telephone is provided with answer signal sending means including a microphone, and a common line is connected to the outputs of the answer signal sending means of respective key telephones for sending the outputs to the voice switch, thus permitting a selected key telephone to perform a hand-free communication.