| 1. | In the same year, the NEAX61 digital switching system went in to service.
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| 2. | The new digital switching systems will replace equipment currently handling TOT's entire network.
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| 3. | An antiquated 1930s phone system was replaced with 1990s fiber optics and digital switching.
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| 4. | It has been supplying digital switching, transmission and management systems to China Railways for 10 years.
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| 5. | Others lack the digital switching system that allows multitudes of information to travel quickly over phone lines.
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| 6. | Since then, employees have patented transistors, lasers, solar cells, communications satellites, digital switching and cellular mobile telephones.
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| 7. | In 1985, Wisconsin Bell began to purchase digital switching equipment from Siemens for its 1.6 million customers.
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| 8. | This became the first Indian private sector company to manufacture telecom equipments and export digital switching systems.
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| 9. | Puerto Rico Telephone Co . uses modern digital switching equipment and, it is widely agreed, provides good service.
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| 10. | Previously, new technology had entered the telecommunications industry slowly, with the telephone companies digital switching until the 1990s.
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