| 摘要 |
PURPOSE:To furnish night-hour service for private homes that want to use telephone only during the night time zone when the charge is discounted by switching to a first subscriber's line of a business collective telephone equipment that becomes excess during specific night time zone by a transmission-connection request from a second subscriber's line. CONSTITUTION:If a call is made from a subscriber B who requests for a transmission-connection only during night time zone, a central processing unit 3 regsiters this subscriber, at the same time, outputs a switching signal to a switch controller 4 to switch and connect the line of the subscriber B to the exess line of a business collective telephone equipment 2. Upon receiving said signal, the switch controller 4 activates a switching switch S to connect the line from the subscriber B with the exess line of the equipment 2. In such a way, by utilizing the existing trunk line on the business collective equipment 2-side that becomes exess during the night time zone, the night-hour service is executed for a subscriber who want to use the telephone only during determined night time zone.
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