[Asterisk-Users] Re: Not Woodpeckers

[Stephen R. Besch]

Jose Quinteiro wrote:
> I live at sea level, and have never seen a woodpecker going at any telco 
> equipment, but have a 60Hz hum on my POTS line through my Adtran 750.
> 
> It goes away if I pick up the telephone I have cross-connected on the 
> same line.  Could it be the same problem (i.e., tip-ring imbalance?)
> 
> Thanks,
> Jose.

Lots of phones used to have a separate (3rd) ground wire delivered to 
the phone which was used in party line set ups. When very young, I 
discovered that connecting a phone tip to ground or ring to ground would 
result in a fabulous hum. I suspect that you have inadvertently 
connected one of the phones tip to ground or ring to ground.

Stephen R. Besch