[Asterisk-Users] Buzzing on TDM400P FXS?

[Brian Cuthie]

Haven't seen this, but I do hear a loud click about 5 seconds into any call
involving a TDM400P port. Seems like something might not be quite right with
the Zap driver.

-brian 

> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com 
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> Scott Laird
> Sent: Monday, April 05, 2004 1:42 PM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Buzzing on TDM400P FXS?
> 
> I have an intermittent problem with the one FXS line that I 
> have.  On most calls, the first ~5 seconds of the call has a 
> loud buzzing noise on the line.  After 5 seconds or so, it 
> fades off to nothing, and the sound quality is great.  
> Searching for "buzzing" on the list doesn't give a whole lot 
> to work with.  The buzzing happens on calls that are routed 
> over both my FXO line and IAX to NuFone, so I'm pretty sure 
> that it's happening on the FXS end.
> 
> Here's that chunk of zapata.conf:
> 
>   context=inside-analog
>   signalling=fxo_ks
>   callwaiting=yes
>   callwaitingcallerid=yes
>   cancallforward=yes
>   callreturn=yes
>   threewaycalling=yes
>   transfer=yes
>   echocancel=yes
>   echocancelwhenbridged=yes
>   relaxdtmf=yes
>   rxgain=1.5
>   txgain=0
>   immediate=no
>   musiconhold=yes
>   usecallerid=yes
>   callerid="Analog Phone" <2201>
>   mailbox=2201
>   channel => 2
> 
> Does anyone have any suggestions on where to start looking?
> 
> 
> Scott
> 
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