Serial Port Servers provide many advantages over serial port cards installed in
a computer. More than one computer on the network can access a serial port,
though not simultaneously, and access can occur over a wireles network. Two
serial port servers I have and use are the Digi Portserver TS 16 and the
Comtrol Devicemaster. Each of these Serial Port Servers utilize an ethernet
connection, are 1 rack unit (RU), appear as installed serial ports on each
installed computer, have 16 serial ports, and require no installed operating
system. These can be obtained at reasonable prices on auction sites. I would
not recommend building up a computer with numerous serial cards, as this
solution is not as flexible.
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