BS EN ISO 62056-31. Electricity metering. Data exchange for meter reading, tariff & load control. Part 31. Use of local area networks on twisted pair with carrier signalling Electrical equipment, Meters, Electricity supply meters, Data transfer, Data handling, Interfaces (data processing), Power control (electric), Information exchange, Local area networks, Twisted pair cables, Signals, Communication technology, Signal transmission, Open systems interconnection, Bus networks