This reference design application note outlines a system solution for an IP speakerphone using the Zarlink ZL38004 voice processor and the 5VT1312 IP processor. The reference design identifies third-party devices required to complete the system. This is a preliminary design and should be considered as a proof-of concept-only at this point. It has been
presented to illustrate a theory of operation and to estimate circuit complexity.
This reference design will cover the system design from analog microphone/speaker MII including the digital-to-analog and analog-to-digital conversion voice processing and packet processing. The proposal does not include the LCD interface although a CPLD is incorporated into the design to provide a simple interface to a parallel simple LCD module.
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