System X (telephony)
http://dbpedia.org/resource/System_X_(telephony) an entity of type: WikicatTelecommunicationsInTheUnitedKingdom
System X is the digital switching system installed in telephone exchanges throughout the United Kingdom, from 1980 onwards.
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System X (telephony)
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991365
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1107370014
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System X is the digital switching system installed in telephone exchanges throughout the United Kingdom, from 1980 onwards.
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21841