7 Aug
2006
7 Aug
'06
5:10 p.m.
OK, the 840AV has one of those mini-centronics-style
connectors on the rear for the network transceiver.
I have some "Asante FriendlyNet Thin Adapter"s that will
mate with this and work -- for a 10Base2 network!
The Asante box has an RJ45 on the rear. The cable that
mates to the network connector on the 840AV has that
funky mini-centronics on one end and an RJ45 *plug*
on the other.
This choice of connectors -- and the "Thin Adapter"
moniker -- suggests that I could plug the RJ45 *plug*
end of this cable into a hub directly?
Is this true? Or, just wishful thinking (and an unfortunate
choice in connectors on Asantes part)?
7 Aug
7 Aug
7:41 p.m.
Nope, I'm 99% sure the RJ45 cable is not a regular CAT4/CAT5 style ethernet
connector, since I have some of the same Asante adapter dongles with RJ45
jacks on the end of them (IE the AUI->RJ45 connector fits into a box, that
has another RJ45 jack on it that's the ethernet interface.)
Man I hated thinnet :)
On 8/7/06, Don <THX1138 at dakotacom.net> wrote:
OK, the 840AV has one of those mini-centronics-style
connectors on the rear for the network transceiver.
I have some "Asante FriendlyNet Thin Adapter"s that will
mate with this and work -- for a 10Base2 network!
The Asante box has an RJ45 on the rear. The cable that
mates to the network connector on the 840AV has that
funky mini-centronics on one end and an RJ45 *plug*
on the other.
This choice of connectors -- and the "Thin Adapter"
moniker -- suggests that I could plug the RJ45 *plug*
end of this cable into a hub directly?
Is this true? Or, just wishful thinking (and an unfortunate
choice in connectors on Asantes part)?
8:25 p.m.
Jason McBrien wrote:
Nope, I'm 99% sure the RJ45 cable is not a regular
CAT4/CAT5 style ethernet
connector, since I have some of the same Asante adapter dongles with RJ45
jacks on the end of them (IE the AUI->RJ45 connector fits into a box, that
has another RJ45 jack on it that's the ethernet interface.)
So you have a similar box for 10BaseT instead of 10Base2?
And, your "proof" is that such a box would NOT be necessary
if, in fact, the RJ45 from the Mac side was a real 10BaseT
interface?
Man I hated thinnet :)
Well, if your boxes will only run 10Mb/s, 10Base2 is a *cabling*
win if you have a lot of boxes in a small area -- since you can
daisy chain them instead of having to make room for a hub/switch
*and* N cables ... :-/ I know the machines that I have tethered
together with coax don't have quite the same amount of cable-clutter
as the other twisted-pair machines... :-/ (sure would be nice to
have a small AUI<->802.11g adapter :> )
11:15 p.m.
At 8:25 PM -0700 8/7/06, Don wrote:
Jason McBrien wrote:
Isn't that "box" just a transceiver? I know I have both 10Base2 and
10BaseT ones.
Nope, I'm 99% sure the RJ45 cable is not a
regular CAT4/CAT5 style ethernet
connector, since I have some of the same Asante adapter dongles with RJ45
jacks on the end of them (IE the AUI->RJ45 connector fits into a box, that
has another RJ45 jack on it that's the ethernet interface.)
So you have a similar box for 10BaseT instead of 10Base2?
And, your "proof" is that such a box would NOT be necessary
if, in fact, the RJ45 from the Mac side was a real 10BaseT
interface? as the other twisted-pair machines... :-/ (sure would
be nice to
have a small AUI<->802.11g adapter :> )
Do they still make wireless adapters that will plug into a
10/100/1000Base-T network card? I've been wanting one for my PDP-11.
I think they're typically marketed as being for something like an
X-Box. You'd still need a 10Base-T transceiver (as would I), but it
should work.
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
| MONK::HEALYZH (DECnet) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
8 Aug
8 Aug
6:15 a.m.
On 8/7/06, Don <THX1138 at dakotacom.net> wrote:
So you have a similar box for 10BaseT instead of 10Base2?
And, your "proof" is that such a box would NOT be necessary
if, in fact, the RJ45 from the Mac side was a real 10BaseT
interface?
That, and this:
http://pinouts.ru/Net/AAUI_pinout.shtml
Man I hated thinnet :)
Well, if your boxes will only run 10Mb/s, 10Base2 is a *cabling*
win if you have a lot of boxes in a small area -- since you can
daisy chain them instead of having to make room for a hub/switch
*and* N cables ... :-/
Yep, for a smallish network it isn't bad. Unfortunatly I inherited two labs
of about 80 PCs daisy chained together. It seemed like every time a user
brushed against a coax cable half the segment would go down, then you'd get
to trace out which cable went flaky. Sometimes the cable would go flaky
overnight, just for the fun of it.
I know the machines that I have tethered
together with coax don't have quite the same
amount of cable-clutter
as the other twisted-pair machines... :-/ (sure would be nice to
have a small AUI<->802.11g adapter :> )
3:13 p.m.
of about 80 PCs daisy chained together. It seemed like
every time a user
brushed against a coax cable half the segment would go down, then you'd get
to trace out which cable went flaky. Sometimes the cable would go flaky
overnight, just for the fun of it.
This generally means somebody has misused the BNC plugs. Personally, I
use solder-type BNCs, and get the right ones for the cable I am using.
When I was doing this as part of a job, I used crimp plugs, but again got
the right ones for the cable and used an expenxive (very expensive) crimp
tool).
if you use any old BNC plugs and crimp them with a cheap tool (or worse
still with pliers), you will have problems. But correctly done, a BNC
connector is very reliable.
-tony
4:10 p.m.
Tony Duell wrote:
The problem, in my experience, is folks who beat on the T's
and end up introducing "slop" into the connections. I've
found the "goal post" T's to be much easier on the cable
as they let them dress more naturally (though there is
still some stress on the connection to the transceiver's BNC)
of about 80
PCs daisy chained together. It seemed like every time a user
brushed against a coax cable half the segment would go down, then you'd get
to trace out which cable went flaky. Sometimes the cable would go flaky
overnight, just for the fun of it.
This generally means somebody has misused the BNC plugs. Personally, I
use solder-type BNCs, and get the right ones for the cable I am using.
When I was doing this as part of a job, I used crimp plugs, but again got
the right ones for the cable and used an expenxive (very expensive) crimp
tool).
if you use any old BNC plugs and crimp them with a cheap tool (or worse
still with pliers), you will have problems. But correctly done, a BNC
connector is very reliable.
8:12 p.m.
Jason McBrien wrote:
On 8/7/06, Don <THX1138 at dakotacom.net>
wrote:
Understood. I used 10Base2 as an interconnect scheme for some
process control equipment (where daisy-chaining cable is
inifinitely preferable to having to locate another piece
of gear -- hub/switch) but avoided the T's and BNC's
for exactly that reason.
At home, I rarely find problems with the 2 10Base2 networks
here. But, they are small and have few enough nodes that
even if a problem materializes it is more often than not
a cable that I unplugged to move a piece of gear :-(
Well, if your boxes will only run 10Mb/s, 10Base2
is a *cabling*
win if you have a lot of boxes in a small area -- since you can
daisy chain them instead of having to make room for a hub/switch
*and* N cables ... :-/
Yep, for a smallish network it isn't bad. Unfortunatly I inherited two labs
of about 80 PCs daisy chained together. It seemed like every time a user
brushed against a coax cable half the segment would go down, then you'd get
to trace out which cable went flaky. Sometimes the cable would go flaky
overnight, just for the fun of it.
2:59 p.m.
Nope, I'm 99% sure the RJ45 cable is not a regular CAT4/CAT5 style ethernet
connector, since I have some of the same Asante adapter dongles with RJ45
jacks on the end of them (IE the AUI->RJ45 connector fits into a box, that
has another RJ45 jack on it that's the ethernet interface.)
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.
Man I hated thinnet :)
Why? I much prefer it to 10 base T, which has a bub I need to be able to
repair. At least with thinnet, all I have to fix are the transceivers
(and some of those are built from discrete trasnsitors and ECL chips (!)).
-tony
6710
days inactive
6711
days old
8 comments
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participants (4)
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