There are also doubts about whether such a high-capacity network can pay for itself.

Another attraction of data transmission is that even with conventional copper coaxial cable, the cable companies already have a high-capacity network in place.

More and more Internet service is likely to be delivered in the future not through telephone lines, but over the high-capacity networks that now deliver cable television.

The main drawback, they say, is that high-capacity digital networks are not yet either widely available or affordable.

But Mr. Noam said he saw hope in the trend toward high-capacity networks being created by the cable television and telephone companies.

Applications that require a high-capacity network are at the center of the project's charter.

Both projects are intended to construct high-capacity networks.

It also offers high-capacity networks and long-distance service internationally and in regions outside its local service.

If we've analyzed its structure correctly, our transmissions should be going out over a high-capacity network, perhaps reaching all around the world.

Broadband refers to high-capacity networks that are capable of carrying much more audio and video information than today's typical phone network.