Now we have to narrow it down even further. Did Moses get instruction from God and then blow the silver trumpets, and everybody gathered around? No, that is not the way that it worked because we find...
God spoke to Moses. Moses called for the elders. The elders then went back to their tribes, and they spoke to the people. So we have to begin to allow some time for the word to get out to the elders, and then for the elders to get back to Moses. Next, Moses had to communicate to the elders. The elders then had to go back to their tribes, and communicate it to all the families in the tribe. That was their communication system. (And they used it frequently, throughout the entirety of the Exodus.)
