DIN EN 13757-4-2005
仪表通信系统和仪表远程读数.第4部分:无线仪表读数(在868 MHz 至870 MHz SRD频带上运行的无线电仪表读数)
Communication systems for meters and remote reading of meters - Part 4: Wireless meter readout (Radio meter reading for operation in the 868 MHz to 870 MHz SRD band); German version EN 13757-4:2005