[Asterisk-Users] Adtran TA750 Noise

[Greg Scasny]

All,
I need help.
I have an (actually 2) Adtran TA750's with 8 FXO ports. I get a terrible
buzz on every FXO port. If I unplug the Adtran and put an analog phone
on each incoming line, I have no buzz.
I also have 2 Carrier Access Access Bank I's with 12 FXO ports. When I
plug the same analog lines into either one of those, no noise or buzz
whatsoever.
 
I went so far as to move the TA750 to within 5 feet of the demark and
ran a short CAT5 cable from the demark to the TA705 and still lots of
buzz. 
 
I have duplicates of every part for the TA750's and swapped every
component and cannot get rid of the hum on either unit. I have the power
supply of the Adtran grounded. I am out of ideas :-(.
Any assistance would be greatly appreciated.
 
 
Thanks in advance.................>>Greg
 
Gregory P. Scasny
Golden Technologies Inc.
http://www.golden-tech.com <http://www.golden-tech.com/> 
219-462-7200
 
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