A computer apparatus is provided, which has a multipath acoustic output system and a multipath acoustic input system, which includes parts for enabling an adaptation of the filter of an acoustic echo canceller incorporated in the computer apparatus that is always precise regardless of the chronological delays of the components of the computer apparatus, wherein the chronological delays are variable for acoustic signals.

 
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< Call routing from manual to automated dialog of interactive voice response system

< Communication device having a two-mode controlled isolation circuit for power transport and bidirectional communication

> Headband having a plurality of interchangeable attachments for holding a cellular phone to the headband

> Generating one or more triggered operations to prepaid service node based on connection with intelligent peripheral component
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