Digitus DN-13020 User Manual page 16

D. Now, PC will detect the plug-in of the USB device. The "connect" operation is a software
operation that simulates an actual USB device plug-in. That is to say, when you do a
"connect" operation in the Control Center, PC can then detect a USB device's plug-in,
although actually you do not plug in any USB device.
E. Then, just use the USB device as if it is connected directly to your PC's USB port.
F. After you finish using the USB device, click the USB device in the Control Center and then
click the "Disconnect" button to disconnect the USB device. Other PCs can not "Connect"
the USB device until you "Disconnect" that USB device. That is to say, only one PC is
allowed to connect the USB device at the same time.
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