61.   The cost of buying the necessary equipment could be more than twice the cost of existing digital networks, industry executives say.

62.   The company has spent heavily in the past five years to turn its systems into digital networks.

63.   The company is offering these services through its new two-way digital networks.

64.   The feasibility of streaming video, of course, requires speeding up digital wireless networks.

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

66.   The number of phone lines that provide high-speed access to the Internet, known as integrated services digital network, more than doubled from a year ago.

67.   The phones will work on any analog wireless network in the U.S., or a TDMA-based digital network.

68.   The news also pushed up stocks in cable makers expected to gain from increased demand for fibre optic cables used in digital networks, traders said.

69.   The NTT report is pushing up stocks in cable makers expected to gain from an increased demand for fibre optic cables used in digital networks, traders said.

70.   The quality and variety of satellite television has forced cable operators to scramble to install digital networks.