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trixter <a class="moz-txt-link-freetext" href="http://www.0xdecafbad.com">http://www.0xdecafbad.com</a> wrote:
<blockquote cite="mid1129165771.11153.133.camel@rufus.home.tld"
type="cite">
<pre wrap="">On Wed, 2005-10-12 at 17:46 -0700, Paul Mahler wrote:
</pre>
<blockquote type="cite">
<pre wrap="">You need about 30MHz per channel. That means the Soekris can only handle part
of a T1, it will never handle a quad span.
Paul
</pre>
</blockquote>
<pre wrap=""><!---->
How was that determined?
I have a problem with a plain number like that, which may have been
taken into account, why I am asking...
Different cpus operate differently, taking more or less time to complete
certain functions. Instruction optimization can go a long way if those
instructions are used (not terribly likely if its just pushing bits but
there are some for just that).
Additionally there is no codec processing (presumably) with TDMoE, does
the 30MHz take into account any codec processing or is it literally
30MHz (on what cpu class?!) for just pushing bits?
There are other factors, but you did say 'about' so they are optional to
this conversation, ie other IRQs on the box, potential for device
polling, etc. A tuned system for that specific task (pushing bits
between a TDM card and ethernet via TDMoE) may be able to operate at a
lower clock speed per channel, but that isnt as important for the
initial questions.
</pre>
<pre wrap="">
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</blockquote>
MHZ is not a valid way of gauging performance. It's all about the MIPS
(Millions of Instrictions Per Second), Baby :).<br>
<br>
I was testing with some of the Soekris boards about a year ago for an
client, the need was to make a TDMoE -> TDMoE router for a wireless
network. (Yes I know that that is a stupid idea, and I told the client
that it was a waist of his money to have me try.) the board I was using
I think was the 4801, not sure thoe (It was a year ago) but it would
pust 48 TDMoE channels at once over 100BaseT ok. So I would think that
It would. I was using a customized linux distro, (as in one I created)
contact me off list if you would like a copy of the distro.<br>
<br>
--<br>
Christopher Dobbs<br>
Wireless Administrator<br>
Valario Inovations<br>
<br>
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