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			I think they use both. There are times when they probably cannot hear very well. I am sure there are other times they hear part of what you say and personally I want to avoid the people only hearing the end of the number. I also feel that part of this has to do with your signals and how clear they are. 
 Peace
 
				__________________Let us get into "Good Trouble."
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 Charles Michael “Mick” Chambers (1947-2010)
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