On Oct 22, 2005, at 12:54 AM, Wouter van Ooijen wrote: > > That's why I suggested fiber, in which light travels > with the speed of light... But it doesn't. In fact, IIRC, an ethernet signal on coax (sorry; old knowledge) travels at about .77c while light down a glass fiber only travels at about .67c (index of refraction is ration of speed of light in substance to speed of light in vacuum. For glass it's about 1.5) BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist