| 摘要 |
PURPOSE:To realize a series connecting condition by a containing box provided with a control board, to improve the maintenance property, and to realize the economical effect by providing a connecting connector to a subscriber's circuit containing box, on the containing box provided with the control board, and executing a connection between these connectors by using a switch. CONSTITUTION:By an operation from a control board, relays TK being in BOX0-BOX3 are operated. When they are operated, a subscriber's circuit and a talkie sound source are connected, and a talkie sound is sent to a subscriber. Another contact of this TK relay is provided on each BOX, a confirmation relay AC is operated, a lamp is turned on by a contact of this relay, and it is informed to a maintenance service person that information has been transmit ted to all the subscriber's circuits. In this way, by only executing a connector connection between the containing box of the control board equipment, and the subscriber's circuit equipment containing box, and by only setting a switch which has been provided in the containing box of the control board equipment, an optional number of subscriber's circuit containing boxes can be connected in series, and the maintenance can be simplified.
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