For some time I have been searching for a USB to Serial adaptor that works correctly with the Fanuc CNC controls fitted on the 600 UK products that I support.
I now use and recommend a USB to Serial adaptor supplied by Brainboxes Limited
They can look after all your RS232 hardware needs, be it getting your Netbook to talk to your CNC or your Desktop serving your CNC machines via RS232 multi port cards.
I find their products very reliable and their support team are very helpful.

Les Robbins

Thank you for Brainboxes' continueous support for years & you're always very responsive & attentive to Lenovo requests. 

Looking forward to a ongoing & mutually beneficial partnership. Let's keep talking. :)

Lenovo China

I changed to BrainBoxes serial ports on PCI cards (UC-235) ... and haven't had any problems since.

Pete Dowson

Thank you .You guys did a great job for us and I look forward to doing business with you in the future.  Have a Happy Holiday!!!!

Cummins Inc.

…I would recommend a BrainBoxes PCI Express card or PCMCIA card. Brainboxes seems to be a forward-thinking company that has very strong driver support across its entire range, including some products more than 10 years old.

Tim Long