Method and circuit arrangement for controlling a subscriber line interface circuit

A circuit arrangement for controlling a subscriber line interface circuit (106), which is connected to at least one data line (102) and to at least one subscriber line (104) associated with a subscriber (102), in the on-hook state, having the following features:

• a memory (138);
• a detector (128) for detecting on-hook data transmission signals in the data line (122) and, if an on-hook data transmission signal intended for the subscriber (102) is detected in the data line (122), for buffer-storing the detected on-hook data transmission signal in the memory (138);
• and
• a controller (136) for switching the subscriber line interface circuit (106) from a passive operating mode to an active operating mode if the detector (128) detects an on-hook data transmission signal intended for a subscriber (102) in the data line (122) and for switching the subscriber line interface circuit (106) from the active operating mode to the passive operating mode if the buffer-stored detected on-hook data transmission signal has been transmitted by the subscriber line interface circuit (106) in the subscriber line (104) to the subscriber (102).