[*] ring tone warble

[LES.NET (1996) INC.]

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>
>>
>> ________________________________
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>> 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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-- 
Leslie Bester
LES.NET (1996) INC.
1-866-944-0009