🚀 go-pugleaf

David Reid (David@davita.demon.co.uk) wrote:

: I notice that the Etherlink card has a D connector (15 way?) as well as 
: the BNC connector. Is it an alternative (better?) way of connecting the 
: two cards? 

This is an AUI connector, used for connecting a 'Thick ethernet' transceiver
or for connecting to a 10-base-T hub.

:            Assuming that I use the BNC connectors, why are the T-pieces 
: and 50ohm loads necessary? Why not just put the end of the cable
: straight onto the coax?

Because that would leave your cable unterminated, a network of this kind
is what's termed as a transmission line, and if you don't terminate it 
with the characteristic impedance of the line then any signal travelling
along the line will reflect off the end of the line and make it's way 
back down the line, interfering with anything else that happens to be
making it's way along the line at that time. The end result is that 
your network either doesn't work at all, or is unreliable/very slow.

I
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