From: Matthew Poole (matthew.poole@blueyonder.co.uk)
Date: Tue Feb 04 2003 - 20:23:43 GMT-3
G729 uses 8Kbps, but when you add on the size of the IP header and layer 2
header this can be around 30Kbps which is what your getting.
If you were using compressed RTP you could get this down to about 11.2Kbps
total
The counters are over a time period of 5 mins (I think) I remember on a
course I was on we changed the timer down to 30 seconds to give us a better
average.
I got these figures from my CVoice course notes, other may have practical
knowledge of how they are in real life.
HTH.
----- Original Message -----
From: "Lillemor Hamnqvist" <lillemor@hamnqvist.org>
To: <ccielab@groupstudy.com>
Sent: Tuesday, February 04, 2003 8:04 PM
Subject: OT: Voice compression
> Hi,
>
> I have a dedicated VoIP circuit, HDLC. What can I do to get the better
> compression? I'm using g729, but it looks like each call takes about
30kb.(I
> look at the load in the serial line). I would expect it to be lower. Is
the
> load number in 'show interface serial' accurate ? What is your experience
?
> Thank you,
> /lillemor
> .
.
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