Level3 is a giant in the business of communications, so many companies will probably adopt their revolutionary VoIP service in the near future. Businesses can now handle all their toll-free calls through VoIP, thanks to Level3, and this is a completely free service. The prospect is a boon for call centers in particular, as well as offices that conduct a lot of conference calls. There aren't any drawbacks to this service to speak of, but it is limited to businesses and probably of no use to individuals making personal calls.