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Automatic Meter Reading
They are major three topologies for AMR systems:
2. Each meter is connecting to a M1000 smart GPRS modem via RS232 by using GPRS (meter control the modem via AT commands);
3. Each meter is connecting to a Data Concentration Units (DCU), which may support up to 32 meters, and each DCU is connecting to a M1000 Pro serial to GPRS gateway via RS485 by using GPRS (transparent transmit serial data to billing center automatically).
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