The systems and methods of this invention are directed toward reliably exchanging diagnostic and test information between transceivers over a digital subscriber line in {HEAD ~ the presence} of voice communications and {TAIL ~ other disturbances} 
of
The systems and methods of this invention are directed toward reliably exchanging diagnostic and test information between transceivers over a digital subscriber line in { HEAD ~ the presence } of voice communications and { TAIL ~ other disturbances }
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