Just got 4 port version of box you recommended. Worked straight out of the box. Lovely.

People might be interested to know you can also use it as a TCP server and specify the max number of clients connected so multiple cats can use the same box. So far I've had up to four happily working.

Also, as Paul kindly told me the company is now called VS Com and the Product is a NetCom. http://www.vscom.de