3. Connect keyboard and mice to the USB hubs, one set per hub.
• If you are using monitors with built-in USB multiseat devices, we recommend using an extra
USB hub for each station. Connect one monitor, keyboard and mouse to each USB hub.
(Some of these monitors can also be connected via VGA cable. Be careful not to use the
VGA cable if you want to use it as a USB multiseat device.)
2. Connect an ethernet cable to the back of the host PC.
3. Ensure all devices, hubs and monitors are connected to a UPS or surge protected outlets, if
necessary.
4. Turn on the system when ready.
Adding or Removing USB Stations
To add a station, simply plug in a USB multiseat device. No reboot is necessary, the station will be ready to
use after a brief pause (assuming your license supports that number of stations).
Stations can be removed simply by unplugging the USB multiseat device (even from a running system).
General USB Guidelines
• USB multiseat devices only work with USB 2.0 ports.
• It is necessary to configure the host computer so that USB ports are not disabled when the host
computer enters sleep mode.
• Success when using USB stations with notebook and netbook computers may vary since many
notebooks have power management schemes that can interfere with or limit the amount of power
allowed to USB ports.
• We do not recommend daisy chaining USB hubs or USB multiseat devices. But if you absolutely
must, be sure to use powered USB hubs when daisy chaining USB stations. The USB protocol
specifies a maximum of 5 hubs ("hops") per USB port. If you need to use extension cables, ensure
that the distance between the USB device and the computer/powered USB hub is not greater than
5 m (15 ft) to prevent voltage drops.
• Cable quality is very important. Only use high-quality USB 2.0 compliant cables. (Note: 'compliant'
is different than 'compatible'. Good quality cables often say "High-Speed Certified".) We
recommend cable specifications of at least 24 AWG (power) and 28 AWG (signal). Low quality USB
cables can cause excessive voltage drops that can create system instability issues or can cause a
USB multiseat device to be disabled by the Linux Kernel.
• We recommend using powered hubs or Userful USB hubs with audio to connect each station.
For a more in-depth look at USB connectivity, please see USB: Troubleshooting and Guidelines.
Device Assignment
Device Assignment
Userful MultiSeat 4.0 supports auto-assignment of input, storage and audio devices, when possible. In
other words, any device plugged into the same USB multiseat device as a given display will automatically
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Userful Multiplier™, Userful Desktop™, and the Userful Logo are trademarks of Userful Corporation. 10 of 33
Userful MultiSeat Linux™ 2011
User Guide
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