I need to use a computer to report to the central station of an alarm company. To do this the modem must detect a 1400Hz tone followed by a 2300Hz tone. Is this something a standard modem can do? Any input is appreciated. Shawn -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads