The setting option "Control" is important for the acceptance of control commands.

applies to the icucam 4:
"3h/6h/24H" -> means that the camera dials into the network EVERY 3/6/24 HOURS at the respective full hour and "asks" for commands entered. This can be a control command or a requested photo.

Example 3h:

icucam4 dials in at 0:00; 03:00; 06:00 etc. With e.g. 24h, the camera only dials in at midnight.