1.   Among non-manufacturers, telecommunications companies spent the most as they cranked up production of cellular phones and the transmitting stations that forward telephone signals.

2.   And as output of the phones increases, so does construction of the relay stations and computers that relay the telephone signals, economists say.

3.   Before they can provide telephone service, cable companies need to upgrade their networks so that they can sort and send telephone signals.

4.   A busy telephone signal often greeted new subscribers trying to use these services.

5.   Despite repeated attempts, a Viant spokesman could not be reached due to busy telephone signals.

6.   Equipping digital networks to carry telephone signals has proven expensive, and many other cable operators have backed off from offering this service.

7.   For voice to travel via Internet, the gateway computers translate standard analog telephone signals into digital bits, much like music on a compact disk.

8.   He and venture capitalist Jonathan Guerster, of Charles River Ventures in Waltham, Mass., are lobbying to improve the telephone signals that power the BlackBerry on Nantucket.

9.   It converts the phone call from a radio frequency, which is what cable TV uses, to a telephone signal.

10.   It consisted of bottled-gas fuel-containers connected to electrical wiring that could have been detonated by a telephone signal, French sources said.