| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To easily and securely obtain a line for speech communication concerned with new installation, maintenance, and use of a radio link between radio stations. <P>SOLUTION: The directions of ODUs (outdoor units) 1 and 11 are adjusted to establish or maintain radio units of the ODUs 1 and 11 between radio stations A and B. To contact a service engineer during the adjustment, the ODUs 1 and 11 are provided with handsets 2 and 12 and IDUs (indoor units) 5 and 15 are provided with handsets 5 and 16; and the IDUs are each provided with a radio part 6 and a speech line connection destination switching circuit 7 to enable speech communication between them. This switching circuit 7 selectively switches signal lines 8, 10, and 20 to set a speech line between handsets 2 and 9 of the same radio station A and also set speech communication between the handsets 2 and 9 and another radio station B through a public network 18. <P>COPYRIGHT: (C)2004,JPO</p> |
