[asterisk-users] Server Setup Advice

[Matt Riddell]

On 9/03/2009 8:08 a.m., Elliot Murdock wrote:
> Hello Gordon,
>
> Aside from alaw and ulaw, we also use G729.
>
> I am not that familiar as to how Asterisk converts PRI signals into
> coded format, but why wouldn't any transcoding be necessary for alaw
> and ulaw codecs?

Because a T1 uses mulaw and an E1 uses alaw (except in some E1 
connections in Japan - which use ulaw).

If your phones are also using ulaw then the signal would not need to be 
transcoded - there's really very little reason to use anything other 
that alaw/ulaw in a LAN situation - the only reason you would want to 
use G729 etc is if you have bandwidth issues.

-- 
Kind Regards,

Matt Riddell
Director
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