| 摘要 |
PURPOSE: To simplify installation work and to improve maintainability and space saving property by making an extension telephone set a construction to house plural connection units to be connected by radio. CONSTITUTION: A line wire control part 2 to be connected to an analog public network and an extension control part 4 to be connected to connection units 2a by connectors are integrally housed in a main body part 1a. One-to-one speaking is enabled among the connection 2a, telephone sets 9 and hand set 10. Besides, since the connection units 2a can be directly connected to the control part 4 by the connectors, any line cord is unnecessitated. Further, exchange work at the time of any fault in the connection unit 2a or extension work after the installation is facilitated as well. Moreover, since these telephone sets can be vertically arranged, the space for installation can be reduced as well. Further, since the connection units 2a are fixed by screws when the connection units 2a are mounted on the main body part 1a, the main body 1a and the connection units 2a can be integrated, and rigidity can also be improved as a whole. |
