I don't know whether the Asterisk default codec is still ulaw or not,
though I believe it is.
But it doesn't matter. Any connection in the same call between multiple
legs which each use a different codec, whether GSM or otherwise, will of
course require Asterisk to consume CPU in transcoding between the two
different encodings. Each leg gets a codec which transcodes to
Asterisk's native encoding (which I believe is ulaw), in which encoding
mixing and other signal processing is performed, before reencoding back
into the encoding each leg uses.
On Thu, 2007-02-15 at 15:31 -0700,
[EMAIL PROTECTED] wrote:
> Date: Fri, 16 Feb 2007 08:42:49 +1100
> From: "Eric Bishop" <[EMAIL PROTECTED]>
> Subject: [asterisk-users] Meetme - is this statement from the Wiki
> still true?
> To: "Asterisk Users Mailing List - Non-Commercial Discussion"
> <[email protected]>
> Message-ID:
> <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset="iso-8859-1"
>
> "The conference bridge runs Ulaw codec by default. If you let people
> connect
> with GSM or other codecs, Asterisk will use CPU power to convert audio
> between codecs" ... What about alaw channels is there any transcoding
> work
> being done there?
--
(C) Matthew Rubenstein
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