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.
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.A lot of underground cables get problems with water leakage. These can be a pain, even when the telco is prepared to act. I have a problem that my line degrades after typhoons. A day or two later when the telco guy arrives to investigate the water has subsided, and the line tests out OK :-\ In my case I hear no hum, but the connection between storms and line quality makes it obvious water is at work somewhere. Large underground cables (the ones with thousands of pairs) are pressurised to drive any water leakage out. Regards, Steve
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