[cisco-voip] Urgent: Output attenuation - What is louder

[Robert Kulagowski]

If you want incoming voice from PSTN to sound louder, then you'd use 
input gain -3 on the voice port

If you want your outgoing audio to the PSTN to sound louder, then you'd 
use output attenuation -6.

But, if your signal to the PSTN is too "hot", then you'll run into 
problems.  We had an issue with DTMF digits to a conference calling 
system not registering correctly until we removed the output attenuation.