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for detail follow the link www.ehow.com/how_2105839_use-excels-true-function.html

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Posted by HamidAliKhan

pls visit thos link:
www.ehow.com/how_2105839_use-excels-true-function.html

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Posted by crouse

Dear i think you are talking about TRAU (Transcoding Rate Adaption Unit)
This is an entity that performs a transcoding function for speech channels and RA (Rate Adaptation) for data channels.

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Posted by sagitraz