My sense is that much depends on whether the computer on which Skype is spinning the opportunity to listen to ports for connections from the outside and if there is, the width of the channel. Was very unpleasantly surprised after six months of use Skype 24/7 (and a couple of kilosymbols text messages) that have resulted in hundreds of kilobytes of traffic on the channel in 1 Mbit per provider Nate, when he came to account for traffic (at 1P per MB) on channel 10 Mbit with white IP in the same mode traffic exceeded the usual several (not one as I expected) orders. Appeal against a failed (that is, in principle, reasonable, but no harm in trying), since Skype only in "Emergency exit Skype, otherwise the cooperation will stop the" soap/telephone and if the collaboration is worth it :)