Fldigi is a digital modem program for Linux, Free-BSD, OS X, Windows XP, NT, W2K, Vista, Win7, and Win8.  Fldigi, along with Flmsg, is used for digital emergency communications in the county.  The default operating mode is MT63-2KL.  To download Fldigi and Flmsg go to:  http://www.w1hkj.com