[cisco-voip] One way audio on 7920 ?

[TechGuy]

I am playing around with a 7920 and so far I seem to have it working but I
am only getting one way audio.  I find this to be odd as it found the
callmanager server, updated the firmware, registered and I am able to place
calls to and from it but no one can every hear me.  I can hear them just
fine but they cannot hear me.  Same issue when calling Unity and leaving a
message.  The message is empty.

Any ideas on where I should even begin on resolving this?
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