[Asterisk-Users] frames/packet

[Lee Goodman]

Sure you get nearly your line rate on the line from your house to your
DSLAM.
Once you get to the DSLAM, you are mixing with all the others users traffic.
Some DSL providers cap your guaranteed bandwidth at about 10kbps.

Lee Goodman
----- Original Message -----
From: "Timothy Soos" <XQL at americanisp.net>
To: <asterisk-users at lists.digium.com>
Sent: Wednesday, September 03, 2003 5:15 PM
Subject: Re: [Asterisk-Users] frames/packet


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Don't count on being able to push the full 32 simultaneous calls.  Cable
modems are notorious for failing to deliver the full bandwidth the
subscriber
is paying for.  In many places customers end up getting 33Kbbps or less on a
regular basis.  The available bandwidth tends to fluctuate  frequently.

In contrast, many (if not most) DSL systems will provide a constant
bandwidth
close to the maximum rate the customer is paying for.  Most DSL providers
will cap the available CONTINUOUS rate to around 540Kbps for a 650Kbps
connection (as an example).  All DSL providers will allow the rate to
momentarily spike to the full speed the customer is paying for.  A small
number of DSL providers allow the full bandwidth to be used all the time.

Tim

On Wednesday 03 September 2003 10:15 am, Paul Lambert wrote:
> "Not yet." implies that it is coming. I know it would help on Internet
> connections such as fixed wireless and cable modem where packet rate is
> an issue. 20ms translates to 50 packets/sec. I believe cable modem
> upstream packet rates cap at 150-200 packets/sec. G729 gets the bit rate
> down to 8kbits. So based on a bit rate of 256K the theory is that the
> link could handle 32 calls. But, that would produce packets coming out
> at a rate of 1600 packets/sec beyond the limitation of most Internet
> connections including a T1.
>
> Martin Pycko wrote:
> > Not yet.
> >
> > Asterisk always sends 20 ms of voice data per packet.
> >
> > regards
> > Martin
> >
> > On Wed, 3 Sep 2003, Paul Lambert wrote:
> > > Noticed that I can adjust the number if frames/packet on the
> > > GrandStream phone. Can * do the same?
> > > _______________________________________________
> > > Asterisk-Users mailing list
> > > Asterisk-Users at lists.digium.com
> > > http://lists.digium.com/mailman/listinfo/asterisk-users
> >
> > _______________________________________________
> > Asterisk-Users mailing list
> > Asterisk-Users at lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users
>
> _______________________________________________
> Asterisk-Users mailing list
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- --
Thanks,
Timothy Soos
XQL, LLC
303-480-8228
720-979-3128 (Direct)
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