> You can get inexpensive RS232 to optical fiber with range up to two miles= .. > Hmmm... It's been near twenty years ago, but I've run RS-232 on copper over two miles. Granted at a lower baud rate and with actual line drivers that were operating near +-25v. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .