| 41. | The major difference between the two is P-25 is expected to work jointly with existing analog systems.
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| 42. | The analog system, installed more than 45 years ago by the German firm Siemens, is beyond repair.
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| 43. | Other analog systems also failed to convince at least 80 per cent of their subscribers about fraud protection.
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| 44. | "We have transferred from analog technology _ analog systems _ to digital systems and packet switching, " said Torrez.
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| 45. | The Air Force had upgraded the tactical communications equipment from old analog systems to newer, more reliable digital systems.
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| 46. | Centertel became Poland's first and only mobile phone operator after winning a license for an analog system in 1991.
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| 47. | Distortion in digital systems increases as signal levels decrease, which is the opposite of the behavior of analog systems.
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| 48. | Little did I know, however, that the Achilles'heel of today's digital wireless networks is their dependence on older analog systems.
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| 49. | Cellular One and GTE customers can use their phones with the old analog systems in areas to which they travel.
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| 50. | Digital television can offer viewers clearer images and a broader range of programs and other services than current analog systems.
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