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Automatic meter reading
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==== RF technologies commonly used for AMR ==== * Narrow Band (single fixed radio frequency) * [[Spread spectrum]] ** [[Direct-sequence spread spectrum]] (DSSS) ** [[Frequency-hopping spread spectrum]] (FHSS) There are also meters using AMR with RF technologies such as cellular phone data systems, [[Zigbee]], [[Bluetooth]], [[Wavenis]] and others. Some systems operate with U.S. [[Federal Communications Commission]] (FCC) licensed frequencies and others under [[Title 47 CFR Part 15|FCC Part 15]], which allows use of unlicensed radio frequencies.
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