[cisco-voip] Radio CrossTalk

[Wes Sisk]

use dspdumps on the router and packet captures at phones to identify 
exactly where the radio crosstalk is introduced.

/wes

On Thursday, October 22, 2009 3:26:33 PM, STEVEN CASPER 
<SCASPER at mtb.com> wrote:
> A couple of days ago, we implemented IPT at a site that was previously 
> using a Norstar system.  After conversion to IPT, the site has been 
> experiencing radio across all their phone lines that terminate to an 
> FXO card in a 2811.  There is a radio tower approximately 1 mile away 
> from the branch.  We have taken the following actions to try to 
> resolve this issue. 
>  
> From the Dmarc, we validated no radio was coming into the branch.
>  
> We eliminated any bridge taps and created straight run (Cat5 cables) 
> from the Dmarc to the router FXO ports. 
>  
> We added ground wire from the router to a nearby water pipe.
>  
> We went through each phone line and eliminated the thought of one of 
> the lines causing the issue.  
> Does anyone have any other suggestions that we can try?  Interesting 
> that we did not experience this problem on the Norstar.
>  
> Steve
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