Thanks, guys.  This helps confirm what I suspected.  I will try a Wanpipe 
configuration without Master Clock. The D channel has never been down that I 
know of, unless of course the provider is trying to turn on the wrong PRI.  
Man, does trixbox ever complain then!

Peter M.

----- Original Message -----
From: Yajie Si <[email protected]>
Date: Saturday, November 28, 2009 6:44 pm
Subject: Re: [on-asterisk] PRI setup
To: [email protected]


> I had problem with clock source with PRI before with Cisco router PRI
> interface.If Clock source is missconfigured, you will run into time slip
> problem, The D channel won't be even up, not call quality problem. usually
> the time should be delievered from "center server" side.
> 
> Roger
> 
> 
> 
> 
> On Sat, Nov 28, 2009 at 1:09 PM, Philip Mullis <[email protected]> 
> wrote:
> 
> > Also check your rx and tx gains you may be running to high and incurring
> > audio clipping
> >
> >
> > On Nov 28, 2009, at 1:04 PM, "Philip Mullis" <[email protected]> 
> wrote:
> >
> >  Distortion on a channel isn't typically indicative of a digital circuit
> >>
> >> Master clock is typically provided by provider, unless if course your
> >> feeding another box via a pri card
> >>
> >>
> >> Sent from my iPhone
> >>
> >> On Nov 28, 2009, at 12:20 PM, "Peter MacFarlane" <[email protected]>
> >> wrote:
> >>
> >>  Hi Guys:
> >>>
> >>> I need to ask this because you guys know and we should have asked 
> this
> >>> before.  In a PRI configuration, which end normally runs Master 
> Clock?  If
> >>> this is misconfigured, would this be the cause of occasional 
> distortion of
> >>> the voice channels?   It would be good to resolve this problem now 
> that the
> >>> switch is moved to a quality controlled site.
> >>>
> >>> Thanks,
> >>> Peter M.
> >>>
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> >>>
> >>>
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> >
> 
> 
> -- 
> Yajie(Roger) Si

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