| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable only a priority station to perform a communication telephone call to a master station when the communication telephone calls from a plurality of outdoor slave stations are performed simultaneously. <P>SOLUTION: First and second outdoor slave station devices 3 and 4 transmit master station call start requests to which identification codes of their own stations are added to a master station device 1 through a relay station device 2 when off-hooks are performed at communication terminals accommodated in the outdoor slave station devices and wait for master station call start responses corresponding to the requests, respectively. The master station device 1 reads the identification codes added to the master station call start requests when the requests are received, adds the read identification codes to the master station call start responses, and transmits them to the first and second outdoor slave station devices 3 and 4 through the relay station device. When the master station call start responses are received; the first and second outdoor slave station devices 3 and 4 determine whether or not the responses are for their own stations by the identification codes added to the responses, continue communication connection processing when the responses are for their own stations, and end the processing when the responses are not for their own stations. <P>COPYRIGHT: (C)2012,JPO&INPIT |
