The task was to buy a dozen printers (they want to make all printers independent of computers at one company). While reading the price lists, I met such a device -
Networking Adapter with 4 Port USB Server Function LB3 .

The description says that you can connect printers, and indeed almost any device. I decided to buy one for the sample, because on 10 print servers the savings are almost doubled.
Bought.
As it turned out, it does not pull on the print server. This is just a USB-ethernet converter.
The principle of operation - a program + driver is installed on the computer, the program searches for such USB servers on the network and connects the devices inserted into the server as local ones. That is, we receive the USB port removed from the computer. More precisely - 4 pieces (although there is a version of the device with one port). It works only in a peer-to-peer network - in the settings you cannot specify “connect to such and such IP”.
Declared support for Windows from 98SE to Vista and MAC OS 9.2 and higher.
Checked only on XP SP3 and Vista SP2. Works both there and there.
There is a simple web interface through which you can look at the connected devices, change the IP address, download the new firmware and change the password.
The connection of the devices does not require any passwords - just install the program.
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The flash drives, hard disk, mouse, keyboard, printer worked fine. The webcam did not take, said "not enough bandwidth."
Several clients can work with the server at the same time, provided that each uses only one device. For example, you cannot simultaneously connect to a printer from multiple computers. Although no one bothers to share it.
If you want to use a device that someone has already connected, then you can click the button "I want to connect," the current owner of the device will get the request "here they want your device from such and such computer, to give?".
The speed of working with flash drives and USB-drives is small - about 5-7 megabytes. In total, on all devices used (tried on a gigabit network). Printer, mouse, keyboard worked without problems.
In general, I believe that for 1000 rubles the device is useful and it will find its place in the sun.
Although it will still be necessary to play around with webcams, maybe he just didn’t like the old logitech ...