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Hi friends. I was reading a text and i faced with following sentence and could not understand it.Would you help me please ?

"Operators around
the world have been putting WiMAX technology through its paces for some
time"
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Operators everywhere have been using WiMAX technology for a long time.
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Mister MicawberOperators everywhere have been using WiMAX technology for a long time.
what about the its paces over time ? it does not have any meaning ?
I have given you the complete meaning of the sentence.