MFP (multi-function) series print / share server has two different functions, one is to share printer, the port is IPP or RAW, through TCP / IP protocol communication; The One is a shared USB device, which uses USB port and communicates through USB protocol.

If you are using our MFP (multi-function) series print / share server, if the printer you added before and used normally suddenly fails to work, it may be that when you print files, the USB port of the server is occupied by a user and share the USB device at the same time, or after sharing the USB device, The USB connection tool did not disconnect from the USB device，resulting in your inability to print.

The USB port of MFP (multi-function) series print / share server cannot use TCP / IP printer and share USB device at the same time. Otherwise, when the USB device is shared, the USB port will be occupied and the printer cannot be used.

If you encounter this situation, please let all users to disconnect from the USB device on the server and stop sharing the USB device. And you can also try to power off the server and restart the server again. After the USB port is no longer occupied, you can use the printer normally.

Of course, you can also directly connect and use the printer through the "shared USB device", but this method requires running the "USB connection tool" to connect to the USB device on the server. If the shared printer is added through IP address, you can directly send the print command to the printer without running the "USB connection tool" to connect to the USB device on the server.

You can choose the suitable working mode according to your actual situation.

Thank you!