[Asterisk-Users] Woodpeckers

[matt]

I would have thought that should have been gotten rid of...

Notch filter would only get rid of the fundamental frequency unless you 
notch at the harmonics also.

Best bet I would say is a high pass filter at say 500hz.

Reasonably simple to make with a resistor and capacitor... I think Sound 
On Sound magazine (which has archives on the web) had an article on how 
to build one...

The thing is, most of the codecs available in * should be high and low 
pass filtering it anyway...

Matt

Michael Welter wrote:

> I live at 8000' in the Rockies.  We have lots of woodpeckers--they 
> especially love to drill 4" holes in the north side of my house.
>
> They also like to drill on the arial telephone cables.  Water then 
> gets into the cable and causes a partial grounding on the circuits.  
> This causes 60Hz hum to be heard on the line as well as a loss of 
> amplitude.  Qwest says tough s--t.
>
> All three of my POTS lines have hum.  They are connected to an Adtran 
> 750 and my asterisk system (a testbench for commercial endeavors.)
>
> The hum has always been bad on my end.  Since I installed *, several 
> of my callers have remarked about the hum.
>
> So here's the question:  Could a notch filter of sorts be installed in 
> the codecs I use?  Filter-out everything between, say, 55 and 65Hz?
>
> Alternatively, is there a feature on the Adtran FXO card that deals 
> with this?
>
> Thanks for your help,
> Mike
>
>
>
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