On (29 Jul 96) George Fliger wrote to Lew Murray...
 GF> On 28 Jul 96 09:22pm, Lew Murray wrote to Mike Bilow:
 LM> On (28 Jul 96) Mike Bilow wrote to Lew Murray...
 MB> Lew Murray wrote in a message to Mike Bilow:
 LM> A lot of ethernet "devices" have "internal termination."  It
 LM> is either switch or jumper *optional.*  If it is the last
 LM> device,  then you enable it.  If not, you disable it.
 MB> I've never yet seen one, though.
 LM> That's funny;  I've seen several.
 GF> Are you sure you're not confusing Ethernet with Arcnet?  "Internal
 GF> termination", (on the card) is typical with Arcnet NICs but not
 GF> Ethernet.
Yes, I'm sure.  Arcnet is 75ohm and only 2mbits.  
 GF> Can you recall the name of one of these Ethernet devices?  I'd like to
 GF> take a look at one if I can find one in my area.  If not, I might be
 GF> able to get a copy of the spec sheet on one through the manufacturer.
 GF> In any case, you've got my curiosity up.
Why does this raise your curiosity?  All that is required to term-
inate an Ethernet line is a 50ohm resistor from the center conduc-
tor to ground.  Why is it people are having a hard time believing 
that a manufacturer would include this resistor, along with a
jumper block or switch to enable/disable it, when it could make
the difference in whether or not they get some contracts?
As I told someone else, I will be at one particular clients office,
that I KNOW has a 16 port hub with a single BNC connector that
has a switch selector for internal termination, within the next
few days.  I'll get a "make and model" off of that hub so that the
doubters can quit losing sleep over the issue.
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