[Repeater-Builder] Mastr2 19C320671G2 Intercom board info?

[kk2ed]

Can anyone point me to an LBI for the following GE MastrII board?
19C320671G2 Intercom module

I would like to review a schematic of this board and see how I can utilize it 
to source filtered/de-emphasized receive audio.

Thanks
Eric
KE2D