| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an interphone repeater wherein interphone communication is enabled at a low cost in a site in which hot-water supplying equipment has been installed. SOLUTION: This interphone repeater is connected with the hot-water supplying equipment which does not correspond to interphone function. Consequently, interphone communication is enabled between a plurality of remote controllers, among combination of a plurality of the remote controllers having interphone function.</p> |
