When I think 'fiber,' I think of a fast, tensile, vaguely biological apparatus whose overarching job is to shunt. For an edgy, thundrous, monosyllabic word, 'Shunt' works quite nicely for an ISP I think. It's fun to say, too: 'Shunt.'
I wonder if it has too much of a negative tone as it is very similar to 'shun'. Thoughts?