On 13 Sep 2006, at 22:56, Chris Bagnall wrote:
Greetings list,
Has anyone done any research into call routing and transcoding
performance
using a Via Epia based platform?
Be a bit careful on the transcoding issue.
We have a
VIA Nehemiah
1Ghz acting as our office PBX, it has a single PRI line
and is very happy running Asterisk 1.2.9.1
But if I remember the compilation messages right,
it hasn't got some feature of the FPU that a 686
would normally have, so you have to run the
codecs optimized for a 586.
I doubt you would get 60 g729 channels
transcoding on it.
Here's the
show translation output from that box.
Translation times between formats (in milliseconds)
Source Format (Rows) Destination Format(Columns)
g723 gsm ulaw alaw g726 adpcm slin lpc10 g729 speex
ilbc
g723 - - - - - - - - -
- -
gsm - - 5 5 12 5 4 21 50
- 74
ulaw - 15 - 1 9 2 1 18 47
- 71
alaw - 15 1 - 9 2 1 18 47
- 71
g726 - 21 8 8 - 8 7 24 53
- 77
adpcm - 15 2 2 9 - 1 18 47
- 71
slin - 14 1 1 8 1 - 17 46
- 70
lpc10 - 27 14 14 21 14 13 - 59
- 83
g729 - 25 12 12 19 12 11 28 -
- 81
speex - - - - - - - - -
- -
ilbc - 27 14 14 21 14 13 30 59
- -
729 is a bit expensive.
Tim.
Tim Panton
www.mexuar.com/cards.html
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