I've got a customer with some rather small links. This creates the obvious problems in getting voice packets through congested pipes. Testing with PPP interleaving worked quite well, however the use of multilink interfaces is not feasable for administrative purposes (the router would become a nightmare to maintain).
I looked at this last a few months ago but kept hitting a dead end when trying to raise this with cisco.
Is anything being done to give the equivalent functionality to PPP interleaving directly on the physical interface, thus removing the need to double the number of interfaces on a router?