Michael Bray wrote:
>
> So to clarify, would you agree with the statement that the PHY layer is
> synchronous, but the ATM layer is Asynchronous?
>
hmmm nope - the ATM layer is where the blank cells are put in, so
actually its still synchronous, its just that the data coming into it
can be asynchronous.
Actually you can run (synchronous) ATM over an Asynchronous link, as
long as nothing else is using it, its deterministic, and the the stats
of the link are within the required stats for the QoS, hence you can
actually transmit ATM over point to point ethernet (if you *really*
wanted to) :)
Im not sure what happenned to ATM ethernet though, I havent heard
anything on it for ages - there was a CIF forum at one stage (Cells In
Frames).
The synchronisation for ATM is done at the ATM layer, and because of
that, theres always something to send, so you can make full use of a
synchronous physical layer as well, hence the high speed links.
TTFN
Lauren
--
[EMAIL PROTECTED] Lauren Child, BSc. CCNP-ATM & CCDP Certified
http://www.laurenchild.net/ http://www.routerfaq.net/
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