High-performance 32-bit ARM9 core CPU, embedded with Linux operating system Uplink communication adopts public network mode, compatible with GPRS/CDMA, Ethernet, etc. Downlink communication can choose 485, carrier (broadband or narrowband), micro-power wireless and other AC sampling functions; each concentrator manages no less than 1,000 single-phase energy meters and no less than 200 three-phase energy meters; freeze data and curve recording function; support local or remote online software upgrade; anti-theft detection