But the anti-Avanti coalition of environmentalists insists that a second tube will not - as its proponents argue - improve the trans-Alpine flow of traffic.
Carriers will resell the data in healthy doses of 1GB or larger, and Avanti is adamant that there won't be any nasty throttling surprises waiting in store.
Ms Behrens also says the Avanti proposal would contradict an earlier referendum which made it part of the Swiss constitution to aim to transfer as much freight transport as possible to rail and not to disturb the Alpine landscape for transport.