主权项 |
1. An apparatus for a subscriber line interface, the apparatus including a first interface operably coupled to a first subscriber loop, a second interface operably coupled to a second subscriber loop, and a power supply coupled to the first and the second interface to provide a first and a second output voltage to the first and second interface, respectively, the apparatus comprising:
a switch unit operably supplied with an input voltage and configured to provide an intermediate voltage signal; at least a first and a second output branch, each output branch provides an output voltage signal that is dependent on the intermediate voltage signal, wherein the switch unit is configured to set the signal level of the intermediate voltage signal to a high voltage level for a first time interval and to a low voltage level when the first time interval has elapsed. |