[cisco-voip] FXO line quality woes

[Ryan Ratliff]

I'd check cabling for any nearby power lines.  Make sure the router  
is grounded properly, etc.

http://www.cisco.com/en/US/tech/tk652/tk698/ 
technologies_white_paper09186a00801545e4.shtml#buzz
"This problem is often caused by an electromagnetic source or  
telephone cables run near power lines."

-Ryan

On Feb 8, 2008, at 1:31 PM, Paul Choi wrote:

I am having trouble with a set of eight FXO trunks on
a CCME4.1 system.

The customer is saying that a good percentage of their
outbound calls only encounter a loud electronic hum. I
have already ran impedance tests and set all ports to
the recommended level. What else can I do beyond this
point if the customer is still having issues with
outbound calls?

Paul


        
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