| 摘要 |
The interface circuit is a part of a subscriber line circuit and contains, among other things, a feed circuit for subscriber power feeding and an indication circuit for detecting the loop status. To reduce the power consumption in the idle state, the interface circuit is disconnected both from the wires (a, b) of the subscriber line (TL) and, at least with respect to some of its components, from the feed voltage (UB). In the case of a partial disconnection, the part still supplied with voltage contains the indication circuit and with a complete disconnection, a separate indication circuit (K) is connected to be active. <IMAGE> |
