Appeal No. 2002-1241
Application No. 08/883,141
received signals, it cannot be said that Reese performs echo cancellation only “on an as needed
basis,” as claimed. Again, while Reese may employ either a processed or an unprocessed signal,
i.e., either a signal subjected to echo cancellation or the original signal not subject to echo
cancellation, Reese still performs an echo cancellation operation on every received signal, not
merely “on an as needed basis,” as claimed.
Independent claim 8 does not use the term, “on an as needed basis,” but it does make
clear that input and output lines are connected or disconnected with “the lines selected for
interconnection with echo cancellers being identified as requiring echo cancellation by the call
processing system.” Reese does not “identify” such lines because all of the received signals are
subjected to echo cancellation in Reese.
Finally, with regard to independent claim 12, this claim recites a method wherein a first
set of transmissions requiring echo cancellation is identified and a second set of transmissions
not requiring echo cancellation is identified and only the first set of transmissions is routed
through echo cancellers. Since Reese routes all received signals through echo cancellers, Reese
does not disclose or suggest the instant claimed subject matter.
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