[asterisk-users] TDM400P periodic sound clicks on FXS

[Tzafrir Cohen]

On Wed, Sep 12, 2007 at 12:33:02AM +0300, Costa Tsaousis wrote:
> Matthew Fredrickson wrote:
> >Costa Tsaousis wrote:
> >  
> >>Hi,
> >>
> >>I am having periodic sound clicks (2-3 per second) on all FXS of a 
> >>TDM400P when the remote end is my VoIP provider. However:
> >>
> >>- recording the conversation on the asterisk, does not have the 
> >>glitches, although I can hear them on a real phone.
> >>- My VoIP provider to my VoIP phones through the same asterisk is OK.
> >>- TDM to TDM through the same asterisk is OK.
> >>    
> >
> >If TDM to TDM is ok, then it would strongly point towards a problem with 
> >perhaps the VoIP provider.  This is just shooting off of my hip, but 
> >maybe a jitterbuffer issue, like with the phones?  I think when Asterisk 
> >bridges SIP->SIP calls, it doesn't do any jitter buffering.
> >  
> If it is a jitterbuffer, then why the recordings (of the same calls I 
> hear the clicks, not other calls) do not have them?
> 
> Also, I believe it cannot be an issue of the provider since all ATAs I 
> tested do not have the issue (same provider, same account).

How about calls from either the card or the trunk to an echo test
extension? to a local SIP/IAX phone?

-- 
               Tzafrir Cohen       
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