[Asterisk-Users] Woodpeckers

[Luke Roussell]

You may try bridging the tip and ring of each pots line with  a .01
microfarad capacitor. You can pick up a pack of the ceramic type at radio
shack for a few bucks.

Good luck,
Luke


----- Original Message ----- 
From: "Michael Welter" <mike at introspect.com>
To: <asterisk-users at lists.digium.com>
Sent: Thursday, February 19, 2004 5:00 PM
Subject: [Asterisk-Users] Woodpeckers


> 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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