I just activated a C139, and it seems to work ok for a basic phone.  
But on a test to my landline answering machine, the outgoing voice 
quality was only fair.  However, on a real call to a buddy, he said 
he could hear me fine, and it was the same the other way.

Are there any adjustments at all for outgoing voice level or tone or 
whatever on this phone?  I couldn't find any in the manual, but just 
thought I would ask the experts here.