[Asterisk-Dev] notch / high pass filter addition to zaptel

[Andrew Kohlsmith]

On Tuesday 28 June 2005 14:59, Kelly McDonald wrote:
> The only issue I have left is a ~60hz hum that seems to be coming from
> the card itself (bad ps bypassing is my guess)

If you've got 60Hz anywhere in your PC replace that power supply.  I don't 
think I've ever run across 60Hz hum in any kind of modern switchmode power 
supply.  It just doesn't happen.

-A.