I purchased this unit from mpja, and found their spec sheet which shows pinouts. What it doesn't describe is the method of interfacing with the unit. Anybody kn ow how to work with this device? Thanks! PS: I appreciate the replies to my rs232 question - very helpful. Get HushMail. The world's first free, fully encrypted, web-based email system. Speak freely with HushMail.... http://www.hushmail.com