Dave VanHorn wrote: > > > the standard minimums are 40ms tone + 40ms interdigit silence, > > or 160ms/byte - at which rate it could be a while before I see > > the end of that 500 byte transmission. > > You're skating on the hairy edge there.. 50mS on, 50 off is standard. > Pushing it any faster than that calls for some FEC to make sure you don't > have to rerun the whole packet. Thanks - glad people are willing to help somebody new on the list. sure seems a helpful, friendly place. dern - this may force me to rethink the whole scheme. This gizmo originally was programmed through the parallel port, but it's a sound module thingy, so I got the bright idea of using one channel of the stereo for the control signal. For the end user, this was easy - plug one cable into the sound card out and go. Anybody have a good idea for an alternate 'simple modem' I can push info through an audio channel with? -- Anniepoo Need loco motors? http://www.idiom.com/~anniepoo/depot/motors.html