I have a PC Interface and I really cannot financially justify buying a CNI as well. Seeing that CNI is indead a PCI with a Ethernet to RS-232 Converter (Lantronix), any idea on where I could get a cheap Ethernet to RS232.:) At this stage I am even considering using one of my old pcs as an Ethernet to RS-232 converter. Not really a the best of ideas, but I cannot really justify an additional CNI on top of the current PCI. I can see the CNI benefits, but still I cannot justify the costs.