A typical configuration of most PCs will not allow you to start mutliple cameras at the same time. In Windows XP, you can start your cameras in Windows Explorer itself. You will get a bandwith error when you try to start a second camera. WebCam Monitor therefore provides you with an option to configure multiple devices in a cycle, where only one camera is used at any given time. After the specified time interval, WebCam Monitor switches to the next device pair configured in the cycle.
When one camera is in use, all other cameras remain switched off.