FreeLists / si-list / [SI-LIST] Interface of Microphone with Codec

["Adeel Malik" <adeelm@xxxxxxxxxxx>]

Hi All,
         I am posting a little bid off-course question but I know that there
are many good electronic hobbyists who have subscribed to this list.
I am designing an IP-PBX system in which I need to have the provision of
interfacing Microphone/Speakers to the codec in addition to Analog Trunk
Lines and Analog Subscriber Lines. Can someone give me sme info or guide me
to a good link describing how to connect the Common Microphone/Speaker pair
to any standard codec type ?.
The circuit will, of course, include some biasing and decoupling circuitry
for the Mic alongwith additional Signal Conditioning providing frequency
cut-off and common-mode noise rejection.
Regards,
Adeel Malik

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