| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication system wherein the number of lines for use in monitor is not increased regardless of increase of the number of optical conversion type radio signal relay amplification systems for use. <P>SOLUTION: In the case that a plurality of optical conversion type radio signal relay amplification systems RS1 and RS2 of this communication system are used, information exchange with a monitor station can be executed through a single line LL0. That is, a key station device 111 of proper one, for example, the relay amplification system RS1 out of the plurality of relay amplification systems is set as a master key station device by setting of MS switches (master/slave setting switches) 111 and 211, and a key station device 112 of the other, for example, the relay amplification system RS2. Since only the master key station device is connected to the single line LL0 through a LL interface 113, information about monitor of slave key station devices is exchanged with a monitor station through the master key station device, PK interfaces 112 and 212, and a network 114. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
