> If you install a T1 card and an external T1 mux (with fxo cards), the > echo can function already exists within the mux and/or cards. Don't > really need 'another' external echo can box unless you actually > purchased a T1 mux that didn't have echo can in the first place (and > they do exist). Just to be clear here there are a lot of channel banks, fact most that are suggested here (ta 750, ab i/ii, adit 600 and zhone etc) that dont have have echo cans that do benefit from the hardware echo cans eg
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