This standard BS EN 62056-21:2002 Electricity metering. Data exchange for meter reading, tariff and load control is classified in these ICS categories:
35.110 Networking
17.220.20 Measurement of electrical and magnetic quantities
35.100.01 Open systems interconnection in general
91.140.50 Electricity supply systems
Describes hardware and protocol specifications for local meter data exchange. In such systems, a hand-held unit (HHU) or a unit with equivalent functions is connected to a tariff device or a group of devices.
This publication is of high relevance for Smart Grid.
