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Grex Micros Item 237: RJ45 <---> BNC
Entered by drew on Fri Feb 2 21:46:23 UTC 2001:

    Turns out the LAN on my new motherboard has only an RJ45 socket,
whereas what i need is BNC (co-ax). For now, I turned it off and am
using the old Realtek card. But it would be nice to free up the PCI
slot, in case I need it later.

    Is there such a thing as an RJ45 to BNC adaptor? What computer
stores around would sell them? I know I could do it with a 6 foot
RJ45 cable and a hub. I'm like to keep it on-the-cheap if at all
possible though.

4 responses total.



#1 of 4 by scg on Sat Feb 3 00:31:02 2001:

8 port hubs were down to around $30 last I checked, and that was a while ago.
They often have both the RJ-45 and BNC connector on them.  I think that's the
closest to an adapter you're going to come.


#2 of 4 by scott on Sat Feb 3 01:45:36 2001:

He could buy a "media converter" for a hundred bucks or so.. or a cheap hub.


#3 of 4 by scott on Sat Feb 3 01:46:57 2001:

Actually, if there's a 15-pin AUI connector (sometimes common on BNC cards)
it's possible to plug in a 10baseT transceiver, but again that's at least the
price of a hub.


#4 of 4 by ball on Sun Feb 4 07:45:35 2001:

scott, I think drew would need a 10Base-2 transceiver based
on what he wrote.  It's odd that this conversation should
arise now, because I was thinking along these lines this
very afternoon.

I've used 10Base-2 in the past, and have nothing against it.
The two (LAN equipped) machines here in the study at present
are a PC with 100Base-T and a Mac with 10Base-T.  I need to
get a new adaptor cable, or replacement PC-Card for a
laptop.

I'm on the lookout for some old SUN equipment (hopefully a
3/80 and/or 4/60, possibly a VME based machine too). Most of
these seem to have both BNC and AUI connectors. Transceivers
for a few of these could easily cost more than the hub, so I
am thinking of adding a 10Base-2 segment to the LAN. I think
I saw a D-Link hub this evening that featured 8 10Base-T
ports and a 10Base-2.  I ought to get a current blackbox
catalog.

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