[Asterisk-Users] * + Codecs + Hardphones??

[Lenny Post]

What about G.723.1?  Anybody have any experiece with this?  I know I can order the documentation (including C source) from the ITU, what does this entitle me to do?  Are there any licencing gotcha's  to going with this approach?

Lenny

-----Original Message-----
From: Steven Critchfield [mailto:critch at basesys.com]
Sent: Thursday, March 27, 2003 7:21 AM
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] * + Codecs + Hardphones??


On Thu, 2003-03-27 at 06:22, WipeOut . wrote:
> Hi,
> 
> >From what I have been able to work out * supports G.711 a+u, GSM
> and LPC-10 for VoIP calls.
> 
> So far it seems that the Hardphones out there support G.711, G.729
> and some times a few other codecs..
> 
> So the common denominator seems to be G.711, the problem with this
> codec is that it requires approx 64Kbps which is a little high for
> what I am trying to do..
> 
> So it looks like the best codec is the GSM codec as far and badwidth
> vs voice quality, but I can't seem to find which hard phones support
> the GSM codec or if * supports the G.729 codecs or others..
> 
> Which phones do the * user commumity find work the best?? and which
> codecs do you use??

G729 is currently not available due to patent and license issues. You
will find that G711 is fine on a local network, and asterisk does real
well using IAX protocol and GSM codec. So if you are deploying enough
phones to make it worth while to drop a * machine on the LAN with the
hardphones you are set. Otherwise you might want to look at the Snom
phone since it supports GSM.


-- 
Steven Critchfield <critch at basesys.com>

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