Fast low-latency access with seamless handoff orthogonal frequency division multiplexing (FLASH-OFDMOrthogonal Frequency-Division Multiplexing) uses MC-CDMACode Division Multiple Access, a modulation combining the characteristics of OFDMOrthogonal Frequency-Division Multiplexing and CDMACode Division Multiple Access, introduced around 2005. Specifically, the type of MC-CDMACode Division Multiple Access technology used is referred to as FH-OFDMA. The FLASH-OFDMOrthogonal Frequency-Division Multiplexing network is a IPInternet protocol based mobile communications system developed by Flarion. This network was implemented in the 450 MHzMegaHertz (MHz) 10^6 Hz band in a some regions in Europe including Finland, Slovakia and Germany as a replacement for NMT-450 and C-Net C450 signals before ultimately being switched off around 2015. Some FLASH-OFDMOrthogonal Frequency-Division Multiplexing services existed in the United States for a short period of time (2009).
Flarion advertised FLASH-OFDMOrthogonal Frequency-Division Multiplexing has speeds of 1Mbps downlink in a 1.25 FDD spectrum with peak 3.2 Mbps downlink burst and having 300-500kbps uplink with 900kbps peak uplink burst.
MC-CDMACode Division Multiple Access technology is an umbrella term describing systems with both multi-carrier, such as OFDMOrthogonal Frequency-Division Multiplexing, and CDMACode Division Multiple Access characteristics. FLASH-OFDMOrthogonal Frequency-Division Multiplexing uses fast frequency hopping within an OFDMOrthogonal Frequency-Division Multiplexing channel (FH-OFDMA), where each user is assigned a different tone every symbol.
Although Flarion designed products and devices to use 450 MHzMegaHertz (MHz) 10^6 Hz, 700 MHzMegaHertz (MHz) 10^6 Hz, 800 MHzMegaHertz (MHz) 10^6 Hz, 900 MHzMegaHertz (MHz) 10^6 Hz, 1800 MHzMegaHertz (MHz) 10^6 Hz, 1900 MHzMegaHertz (MHz) 10^6 Hz, and 2100 MHzMegaHertz (MHz) 10^6 Hz, only public implementation of the 450 MHzMegaHertz (MHz) 10^6 Hz network was ever documented.