For a tournament with many (>6) boards it is strongly recommended to use the serial interface. In this way you can combine 12 boards in one (split) bus configuration per comport on a computer with a total length of 100 metres of cable. You can make more COM-ports on your computer using one or more USB to Serial converters.
If you have already USB boards, you can use one or more USB-HUBs to combine them. Obviously there are limitations to the distances of the boards due to maximum cable length.
Also Bluetooth boards can be used in small tournaments. The drawback is that the signal may be disturbed by people passing through the boards and computer. Once a connection has been broken, it is not easy to re-establish it again, it is recommended to use the usb cable to connect the boards to the computer(s)
A far better system to connect tournament boards wireless is the "DGT Caïssa System". You can find more information about it in the CATALOG section.
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