Date: Thu, 27 Apr 2000 16:42:03 -0600 From: Wes Peters <wes@softweyr.com> To: Ryan Thompson <ryan@sasknow.com> Cc: freebsd-net@FreeBSD.ORG Subject: Re: Max T1. Throughput? Message-ID: <3908C23B.177C942D@softweyr.com> References: <Pine.BSF.4.21.0004241805280.42785-100000@ren.sasknow.com>
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Ryan Thompson wrote:
>
> Sorry for the slightly off-topic post, here. Couldn't think of a better
> forum to inquire in, though.
>
> There seems to be some confusion around our region on what the maximum
> throughput of a T1 is. (Actually, we are on a 1.544Mbps leased SDSL line
> from a local ISP. The package was sold to us as a burstable T1).
>
> My preliminary tests seem to show a segregation between up and
> down... Each maxing out at about 96KB/sec when the other is practically
> idle. Not the near-198KB/sec that I think I should be getting.
>
> Is SDSL the key, here? Perhaps I took "Synchronous" in the wrong
> way. Does "Synchronous" imply UP = DOWN = 1.54Mbps / 2?
SDSL is not "Synchronus", it is "Symmetrical", in other words you get
the same bandwidth in both directions, as opposed to Assymmetrical DSL
where (usually) the "download" bandwidth is greater than "upload."
Most (all?) DSL providers quote the total throughput. If you buy 512K
SDSL, you get 256K up and down. 512K ADSL is usually 384K downstream
and 128K upstream. If you can get 768K bps down and 768K bps up
simultaneously, you're getting exactly what you paid for, even if it
is not what you wanted or expected.
You should also note that DSL and T1 have nothing to do with each other.
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
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