Maybe you were looking for SDR?
Short Range Device. General term (mostly used outside of the United States) for low power devices (LPD), unlicensed digital systems such as cordless phones, the various WiFi allocations, short range low power data radio systems, remote control, wireless control, radio control, etc. Often compared to the various Part 15 services and sometimes confused with Part 18 ISM services.
SRD860 - 863 MHz - 870 MHz Short Range Device service (Europe) Remote Control/Radio Control - European Standard LPD433 - Low Power Devices, 433 MHz/434 MHz band (Europe) Cordless telephone systems, including DECT
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