H ELECTRICITY
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H04 ELECTRIC COMMUNICATION TECHNIQUE
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H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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12/00 Data switching networks
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H04L12/02 Details
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H04L12/14 Charging; , metering or billing; arrangements; for data wireline or wireless communications
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H04L12/1485 Tariff-related aspects
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H04L12/1496 involving discounts
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