9 Aug
2006
9 Aug
'06
3:33 p.m.
On Tue, 8 Aug 2006 22:59:12 +0100 (BST), ard at p850ug1.demon.co.uk
(Tony Duell) wrote:
Are you telling me that you've linked the 'mini centronics' connector of
a Mac to an 10baseT hub with nothing more than a cable (that is, without
an external transceiver module). Becasue I don't believe this will work.
Of course it's possible to make a 10baseT transceiver that runs on 5V,
and Apple did so. And then made a 10base2 one. That is not the problem,
unless you want to use a 'normal' trnasceiver, not an Apple AAUI one.
-tony
AFAIK the signals on the 'mini
centronics' connector on the Mac are
much
the same as the 'real' AUI interface, with the exception that
there's a
5V power line, not 12V. In which case you can't link it directly to
a 10
base T hub. you need a trasnceriver.
All my Apple branded AAUI with an RJ45 do 10BASET just fine. The
power supply does not set the interface parameters, but the coupling
transformer. I've 100BASET designs running off 3.3 VDC.