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Version History

• Version 1 (1986) formulated by Ferranti, Landis And Gyr, and implemented in the Landis and Gyr Multi Function Unit (MFU) and Ferranti Multi Rate Unit (MRU)

• Version 2 (1991) to achieve compatibility with IEC, becoming IEC 1107, implemented in the GEC Polyphase Meter (PPM), and Horstmann Radio Telemeter (RTM), used by South Western Electricity (SWEB) and East Midlands Electricity (EME)

• Version 3 (1993) modification to allow interogating device to specify baud rate (not part of IEC)

• Version 4 (1994) update to support dial-up via modem, implemented in Schlumberger PXA and PXAr and Siemens S4S, used by Northern Electric, NORWEB, MANWEB and SEEBOARD

• Version 5 (1995) update to support Paknet from Vodafone, used by MEB

• Version 6 (1999) update to support GSM, implemented in ABB Vision and Actaris Indigo+, used by Scottish Power

• Version 7 (2001) update to support IP, implemented in all FLAG compliant meters

• Version 8 (2004) update to support GPRS, implemented in all FLAG compliant meters

• Version 9 (2005) update to support meter as client for battery operated devices

• Version 10 (2009) update to support low power radio (RF) in Home Area Network (HAN)

• Version 11 (2018) update to support Power Line Carrier (PLC)

• Version 12 (2019) update to support low-power Wide Area Network (WAN), Narrow Band Internet of Things (NBIoT)