[VoIP] New Question

[ikjtel]

Hey Paul

Suggest that, for testing purposes, you disable the
echo cancelling stuff entirely.  I think echocancel=no
(in zapata.conf) should do this (but haven't
confirmed).  If the problem persists after you've
properly disabled the echo cancellation features, you
will have eliminated that as a variable. 

What exact FXO hardware are you using?  Is it a
TDM400P or a X100P or what?  Reason for asking is that
a lot of these cards will mute the audio (generally in
the range of 150-200 msec. or so) in certain
situations.   In particular if the answering unit is
reversing battery as part of its cycling, that would
cause the symptom you mention.  You might also monitor
the loop DC current to see if it's steady or if it
fluctuates...

Max

--- Paul Wills <pdwills at verizon.net> wrote:

> Here's a question:
> 
> One of my incoming CNET lines goes to an Automatic
> Electric code call.  The "confirmation" that a page
> is taking place consists of an audible pattern of
> buzzes being fed back to the caller.  Unfortunately,
> the Asterisk seems to clip out any sudden tone or
> sound (It also happens when one calls my Northeast
> Electronics milliwatt source).  This causes the
> caller to only hear a very short burst of tone.  
> 
> Is this the echo cancelling at work?
> 
> Is there a way to remove the tone break without
> screwing up the echo cancelling too much?
> 
> Thanks in advance,
> 
> PDW
> 
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> 
> 



 
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