| 摘要 |
A circuit arrangement for subscriber stations which are supplied by way of subscriber lines and which have dial devices and voice circuits employ, in order to minimize the insertion lost during the voice mode, current feed to the dial device by way of a double Graetz bridge in which two bridge arms are provided in common for both bridges. An additional resistor is connected in the feed line of one of the two bridges os that, in a voice mode, the bridge with the additional resistor is actively switched by means of a dial off-normal contact, whereas, in the dialing mode, the bridge without the additional resistor is actively switched.
|
