Here is the thought. A linux box can be set to autodial a ppp connection. How about a linux box being able to dialup a primary ppp connection ( analog modem) and if another connection is initiated and the utilization of the primary ppp link is greater than some throughput it fires up a secondary ppp connection ( ISDN in my case)
I am not sure if this can be accomplished with existing linux tools/utilities... and I am not sure if ISP cooperation is needed for something like this to work. It probably sounds like another flavor of multilink PPP which DOES need ISP cooperation , so it probably won't happen :) Any ideas/thoughts on the subject are welcome :) Dimitri P.