51.   Personal communications services, or PCS, involve a digital network that requires hundreds of new signal stations.

52.   Texting is possible on most digital networks and is gaining popularity in Europe and a few East Asian nations.

53.   Switching to digital networks, which use call-overlapping and compression techniques, can expand the number of subscribers eightfold or more.

54.   TCI has been a laggard in rebuilding its systems as a digital network.

55.   Telephone companies tried to solve the problem by offering souped-up lines known as integrated digital network lines.

56.   The boxes would use a simpler method of communication with the digital network, BroadBand said, and would have fewer components than competing systems.

57.   The big question is whether Ericsson can capture a share of new transmission stations for digital wireless networks to be installed beginning this year.

58.   The big question is whether Ericsson can capture a share of transmission stations for digital wireless networks to be installed beginning this year.

59.   The company said yesterday it began to offer commercial service to its digital wireless network.

60.   The company said it plans to go ahead with a digital network service in parallel with its existing analog network next spring.