| 摘要 |
PURPOSE:To increase the reliability of charging information, by connecting commonly one same polarity of 3 diodes to the input terminal respectively connecting to the location of allocation of a plurality of subscribers and transmitting the expansion signal introduced as connection as the subscriber number information from another polarity. CONSTITUTION:The expansion signal from the signal source is input to expansion matrix MTX00...MTX49 via the input terminals C0000-C4999. The individual matrix point is constituted with 3 diodes in multiple connection of anode electrodes, and the cathode electrode of diode DU and DT is connected to the terminals TN0- TN9 of the terminals UN0-UN9 and 10 outputting the 1st expansion information of the subscriber number, and the cathode electrode of the diode DV is connected to the terminal VN00 of the 100 and 1,000 rank. When the subscriber of the number 0000 is off-hook, the expansion signal is input from the input terminal 0000, and the outgoing subscriber is detected by the output at the terminals UN0, TN0, and VN00. |
