[cisco-voip] Codecs

[Erick B.]

While were on this, where in Call Manager can I see if
G711 is 10ms or 20ms?  I have a situation where a
client is using some monitoring box and it's set for
10ms g711 and it can be set for 20ms so just want to
check the call manager setting.

--- Paul Long <plong at metreos.com> wrote:

> Anthony,
> 
> G.711 has better quality, consumes fewer MIPS, and
> is unencumbered by patent
> claims but uses more bandwidth than low-bandwidth
> codecs, such as G.729 and
> G.723.1. For comparison, at 20ms packetization,
> which is typical, G.711
> (doesn't matter which power law) uses 80kbps at the
> IP layer whereas G.729
> uses 24kbps.
> 
> Here's a calculator I wrote that lets you explore
> codecs:
> http://packetizer.com/voip/diagnostics/bandcalc.html
> 
> Paul
> 
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On
> Behalf Of Anthony Mendoza
> Sent: Thursday, January 27, 2005 11:32 PM
> To: cisco VoIP
> Subject: [cisco-voip] Codecs
> 
> G711u vs. G729.  
> 
> I noticed G711u being used when I was doing a call
> between two different
> handsets registered on 2 different clusters.  Is the
> G711u more
> efficient than G729 in terms of bandwidth vs.
> quality?  Also, an odd
> thing I noticed was when I hit 9 on one call (to get
> an outside line) it
> used 729, and on another call (hitting 9) it used
> G711u.  Any ideas why
> that would be different on a call by call basis?
> 
> Something I noticed is that the Trunk I have
> configured is in my
> "Location" for my local phones in our office.  Does
> this setting control
> which codec is used when doing intercluster trunk
> calls?
> 
> --
> Anthony Mendoza
> 
> _______________________________________________
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> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
> 



		
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