Clearwire May Block VoIP Competitors
Jared Mauch
jared at puck.nether.net
Thu Mar 31 15:49:51 UTC 2005
On Wed, Mar 30, 2005 at 08:19:40PM -0700, John Osmon wrote:
>
> On Wed, Mar 30, 2005 at 07:05:44PM -0500, Jared Mauch wrote:
> [...]
> > I think one of the major problems is that very few people know
> > how to, or are capable of sending larger g711 frames (at increased
> > delay, but more data per packet) because they can't set these more granular
> > settings on their systems.. this means you have a lot higher pps
> > rates which I think is the problem with the radio gear, it's just not
> > designed for high pps rates..
>
> So, how are the WISP folk dealing with VOIP traffic as it becomes a
> larger piece of their customer's traffic? Does anyone have a way
> to force a given VOIP endpoint to use larger data frames? Or are
2610(config-dial-peer)#codec g711ulaw ?
bytes Specify number of voice data bytes per frame
<cr>
2610(config-dial-peer)#codec g729r8 bytes ?
Each codec sample produces 10 bytes of voice payload.
Valid sizes are:
10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210,
220, 230, 240.
My Hitachi WIP-5000 also lets me set this locally on the handset
but it uses the delay between packets instead of size..
The Cisco ata-186 can set this as well:
# -----------------------------------------------------------------------------
# Parameter: NumTxFrames
# Access Code: 35
# Value Type: Integer (1 - 6)
#
# Description: Transmit frames per packet.
#
# The frame size for each G.711 and G.729 data packet is 10 ms.
# The frame size for each G.723 data packet is 30 ms.
#
# Examples: To obtain 60 ms of G.723 audio, set the value to 2 (=60/30).
# To obtain 120 ms of G.723 audio, set the value to 4 (=120/30).
# To obtain 20 ms of G.711 audio, set the value to 2 (=20/10).
#
# Note: Cisco recommends using the default value of 2.
NumTxFrames:2
--
Jared Mauch | pgp key available via finger from jared at puck.nether.net
clue++; | http://puck.nether.net/~jared/ My statements are only mine.
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