Links on the blink - what will/should mci & sprint do?

Sean Doran writes:

No, what a disaster would mean is replacing backbone 7500s
with 7000s

Sean, are there actually backbone 7500s in production?
I thought that was yet to come. Did I misread something here?

I am not Sean, but yes there are.

Nathan Stratton CEO, NetRail, Inc. Your Gateway to the World!