It is one of the largest carriers of international voice traffic in the world.

The combined entity carried nearly 24 billion minutes of international voice traffic in 2007.

"The industry is seeing a large shift in voice traffic from traditional land lines, mainly to wireless but also to cable."

Using the Internet to route calls could significantly reduce costs, in part, because data and voice traffic will use a single network, advocates say.

The phone company moves nearly all voice traffic as digital rather than analog signals.

"They'll need to diversify away from the dependence on voice traffic."

Besides voice traffic, the network will be designed to carry data and video services.

And the network that the cable companies have erected will be used for voice traffic.

This was the line used exclusively for important voice traffic.

The same was happening to the others because they had tried to hear the voice traffic during our entry flight.