[*] ring tone warble

[John Lange]

We are g711 end-to-end.

In any case the tones don't always line up 100% so you can actually hear
one ring tone start, then the other, then the overlapping sound
(warble), then one ends and then the other ends. Its quite distinctive
once you know what you are listening for.

John

On Thu, 2006-03-09 at 14:15 -0600, LES.NET (1996) INC. wrote:
> A ring tone is basically two sine waves mixed together, which would not
> come across as a 'perfect' ring tone when using a codec other than G.711.
> 
> So perhaps the codec is distorting the ring tone, as it does the milliwatt.
> 
> Les
> 
> 
> > Thank you for your feedback Ray.
> >
> > I'm 90% certain my Asterisk serer is playing ring-tone on outbound calls
> > to the PSTN via our T1/PRI as well as also passing the audio from the
> > PSTN at the same time which results in overlapping ring tones.
> >
> > It does not happen on SIP -> SIP calls, only calls out to the PSTN via
> > Zap. I tested it on 3 devices, SPA 941, SPA 841, and PAP2 with the same
> > results.
> >
> > I'm becoming relatively certain this is a bug in the channel code for
> > Asterisk.
> >
> > --
> > John Lange
> > OpenIT ltd. www.Open-IT.ca (204) 885 0872
> > VoIP, Web services, Linux Consulting, Server Co-Location
> >
> > On Thu, 2006-03-09 at 13:06 -0600, Ray Bowler wrote:
> >> I can't answer it, but can confirm I get the same behaviour at home,
> >> although only on my Sipura-841. Budgetone-101,  Zap channels, Linksys
> >> PAP2 and Grandstream ATA-386 are unaffected.
> >>
> >>
> >>
> >> Ray Bowler
> >> Winnipeg I.T. Ltd.
> >> 1743 Grant Ave. * Winnipeg, Manitoba R3N OM9
> >> * Landline: 204-480-4090
> >> * Mobile: 204-228-4578
> >> * email: rbowler at winnipegit.com <mailto:rbowler at winnipegit.com>
> >>
> >> ________________________________
> >>
> >> From: asterisk-bounces at muug.mb.ca on behalf of
> >> asterisk-request at muug.mb.ca
> >> Sent: Thu 3/09/06 12:00 PM
> >> To: asterisk at muug.mb.ca
> >> Subject: Asterisk Digest, Vol 15, Issue 7
> >>
> >>
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> >> Today's Topics:
> >>
> >>    1. ring tone warble (John Lange)
> >>
> >>
> >> ----------------------------------------------------------------------
> >>
> >> Message: 1
> >> Date: Wed, 08 Mar 2006 12:16:16 -0600
> >> From: John Lange <john.lange at open-it.ca>
> >> Subject: [*] ring tone warble
> >> To: Asterisk <asterisk at muug.mb.ca>
> >> Message-ID: <1141841776.11022.180.camel at ws50.darkcore.net>
> >> Content-Type: text/plain
> >>
> >> I've noticed recently that when placing calls through Asterisk I'm
> >> hearing a strange ringing indication. It has a distinct "warble". In
> >> fact someone commented on it last night at the meeting when Bill was
> >> giving his presentation.
> >>
> >> I'm almost positive that the reason is because asterisk is playing the
> >> ringing audio sound over top the ringing audio which is coming from the
> >> telco. The two ring indicators interfere with each other slightly
> >> causing a "warble" in the sound.
> >>
> >> Can anyone confirm, deny, or refute this?
> >>
> >> --
> >> John Lange
> >> OpenIT ltd. www.Open-IT.ca (204) 885 0872
> >> VoIP, Web services, Linux Consulting, Server Co-Location
> >>
> >>
> >>
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> >> End of Asterisk Digest, Vol 15, Issue 7
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> 
> 
-- 
John Lange
OpenIT ltd. www.Open-IT.ca (204) 885 0872
VoIP, Web services, Linux Consulting, Server Co-Location