On Wed, 18 Mar 1998 13:07:07 +0000 Chris Savage writes: >> I'm making a pulse reader so the min. interdigit time is important >to me >> (anyone done this before or know of any sites) >> I assume it would be around 500ms for a modern push button phone >> but what's the minimum I can expect ? The minimum you should expect is somewhat longer than the maximum "mark" time (33 or 40 ms in most cases). If the circuit stays closed longer than that then it is the end of a digit. So a reader could be set up to work reliably on less than 100 ms anyway. _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866]