[Asterisk-Users] Horrible BUZZZZ noise when sounds/music play on SIP phone?

[Mike Dent]

More info on this!
I bought a Grandstream budgetphone today. The buzz is not apparent
with this phone!

If I dial 8500 from the Tecom phone, it tells me its connected to voicemail
and then the BUUZZZ, which does not stop! It ignores my DTMF tones for
entering the mailbox, just BUUUZZZ.
If I do the same from the Grandstream phone it is fine?

Weird huh?

Thanks
Mike



On Wed, 24 Nov 2004 23:05:23 +0000, Mike Dent <mcdent at gmail.com> wrote:
> I've just noticed that this sound is not apparent when dialing from
> X-Lite but is
> there from the Tecom SIP phone? Does that make any more sense?
> thanks
> Mike
> 
> 
> 
> 
> On Wed, 24 Nov 2004 22:48:36 +0100 (CET), Peter Svensson
> <psvasterisk at psv.nu> wrote:
> > On Wed, 24 Nov 2004, Andrei (MPI) wrote:
> >
> >
> >
> > > David Boyd wrote:
> > > >On Wed, 2004-11-24 at 04:14, Mike Dent wrote:
> > > >>Hi,
> > > >>I've recently set Asterisk up, 1.0.2 version. With 1 x X100P card and
> > > >>1 SIP phone.
> > > >>I've noticed some horrible buzz/rasping type of sounds! These seem to occur when
> > > >>* is trying to play back some audio or sound to me?
> > > >>
> > > >>E.g. If I have an exten rule which plays one of the music on hold
> > > >>files when I dial 800 lets say,
> > > >>I get a really loud buzz for about 2 seconds and then the music plays.
> > > >>
> > > >>E.g. 2. If I dial 500 to connect to Digium, as the call is connecting
> > > >>I get the same loud
> > > >>buzz noise for 0.5 seconds or so.
> > > >>
> > > >>Not sure where this is coming from? I did a search on the wiki for
> > > >>buzz/hum/rasp but could
> > > >>not find anything.
> > > >
> > > >Sound like an IRQ issue. Check to see if you are sharing an interrupt on
> > > >your X100P card, take a peek with " cat /proc/interrupts (on linux at
> > > >least) :)
> > >
> > > ..and stop running X (x-windows) on your Asterisk box. :)
> >
> > It could be the echo canceler. If the line is completely quiet the echo
> > canceler seems to diverge. I think there was a bug in the bug tracker
> > about this that got fixed a while back.
> >
> > http://bugs.digium.com/bug_view_advanced_page.php?bug_id=0002820
> >
> > The fix was merged on 2004-11-17. It may be a good idea to update and
> > check again.
> >
> > Peter
> >
> >
> >
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