| 摘要 |
PURPOSE:To registrate the charging at night for a night direct call telephone set, by providing an incoming/outgoing bidirectional trunk having a switch for direct call loop and a connection circuit to a metering system adaptor unit between a telephone set and a switching device. CONSTITUTION:A metering adaptor unit MSAU-K is caught by OFF-hook of a night direct call telephone set SUB, and one of vacant main line oscillation registers COR-K is caught. Next, after the dial tone from an exchanger in a station is confirmed, when dialing is made from a night direct call telephone set SUB, dial pulses are delivered to the register COR-K and to the station. A metering translator MRTLR-K decides the zone of charging from the dial pulse with the register COR-K and delivers the zone information to a unit MSAU-K. In this unit MSAU-K, the pulse from the multiplication unit IPU-K is converted according to the zone information to activate the charging pulse relaying rlay. |
