FYI, this stack would be installed on my home MicroPDP-11/73 (512KW RAM)
running RSX-11M-PLUS V4.6.
TIA
Given the fact that I have only found BQTCP on MAGICA as the only TCP/IP
stack that runs under RSX-11M-PLUS, I presume that looking for a Telnet
server which also runs under RSX-11M-PLUS is not going to yield much (but
please let me know if such software exists)...
I have also read that some Cisco boxes do a protocol conversion between TCP
and LAT so it is possible to Telnet to a PDP-11 (or VAX) on which LAT is
running.
So here's the question - What is the smallest (and cheapest) box (Cisco or
other brand) that can do this TCP to LAT protocol conversion?
TIA
"Giorgio Ungarelli" <giorgio@*no_spam*ungarelli.net> wrote in message
news:3db68f59$1...@news.bluewin.ch...
Thats the good news. The bad news is that its commercial software and you
have to pay for it, or at least you did at the last count.
Regards
Elizabeth
"Giorgio Ungarelli" <giorgio@*no_spam*ungarelli.net> wrote in message
news:3db68f59$1...@news.bluewin.ch...
Anyway, if you could give me some details regarding wiring, I will get
the exact specifics of how we invoked the commands. It would really
be a bonus to get this thing running.
Thanks in advance.
>/<
> I suspect that I
> got hozed up with cabling. It would be great if you could help me. I
> have an 11/34 with RSX, and a deluna card. I have not messed with it
> for a year, but it seems that we needed an AUI to ethernet converter.
> There is a Vax beside it that has one.
Eh? What do you mean by "ethernet"? You have 10base5, 10base2 and 10baseT
which all are ethernet. For 10base5, you always have a transciever that
is external to the machine, and the AUI is the normal way of connecting
the transciever to your controller.
For 10base2 and 10baseT you normally have the transceiver built-in on the
ethernet controller, but there are external transcievers as well.
Note that the ethernet controller really don't care what kind of cabling
you use for your ethernet.
I'm not entirely sure, but modern PHYs are just a kind transcievers as
well, but software controllable.
You don't say what kind of cabling you use, but I would suspect you use
twisted pair, in which case you need a 10baseT transciever.
(10base5 and 10base2 use coax.)
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: b...@update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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When you see that 15 pin connector, you often need external transceiver.
Common are the ones from DEC that go to 10Base2 (50 Ohm coax, BNC, RG58)
aka "thinnet". DEC (and many others in the PC industry) sell transceivers
to 10BaseT (twisted pair, 8 pin, RJ45). Note: it is all 10 Mbps.
Older PC's with a network interface adapter had sometimes 2 connections.
One 15 pin D sub and (most common) a BNC connector. A DIP switch sets
which port you use. An example are the 3Com "combo" NICs.
If your network has 10Base5 (aka "thicknet") and you want to connect to
it, you need a so-called "vampire tap" and a tool to drill a hole in the
thick cable to remove a small part of the shielding. The you put the
vampire tap with its pin through the hole a tighten the clamp with 2 screws.
The pin will connect (but not punch through) the core wire of the cable.
From the vampire tap you need a "drop cable" to the 15 pin D sub connector.
That cable is called so because, normally, the backbone cable runs over
the ceiling, so the connection cable "drops" down to the equipment.
just my 2 Euro cents,
- Henk.
> Well, John writes that he has a DELUA.
Yes? But the question was AUI <-> ethernet (which is a misnomer, since
ethernet is not the physical media, but the protocol on it. Ethernet can
go over different media).
> If your network has 10Base5 (aka "thicknet") and you want to connect to
> it, you need a so-called "vampire tap" and a tool to drill a hole in the
> thick cable to remove a small part of the shielding. The you put the
> vampire tap with its pin through the hole a tighten the clamp with 2 screws.
> The pin will connect (but not punch through) the core wire of the cable.
There are also 10base5 transcievers which isn't vampire taps. But vampires
have the advantage of you not having to disrupt traffic to hook up
additional equipment to the network.
Still. What he need, no matter what, is a transciever to the proper media.
The transcievers I know of are:
10base5
10base2
10baseT
I also know of a fiber transciever, but I don't know what that's
called. 10baseFOOBAR for all I know. :-)
The AUI to Ethernet converter is necesary if you only have a
15 pin(?) connector on the back of the bulkhead. If you
have a BNC connector, you can just plug it in and it should
be ok. There may be a jumper that selects the BNC or the
AUI port on the bulkhead.
Nice thing about the external AUI-to-xxx is that they usually
have lights on them which makes debugging somewhat easier.
If you really do need one, the AUI to 10-base-T or 10-base-2
are available from JDR or JAMECO last time I looked. Haven't
needed 10-base-1 so don't know if they are available. Also
many electronic surplus shops will have a pile of them,
which is where I usually get mine from.
> The AUI to Ethernet converter is necesary if you only have a
> 15 pin(?) connector on the back of the bulkhead.
Hint: the 15-pin connector *is* the AUI connector. If you don't have that
connector, you'll never need an AUI transciever (to whatever).
> If you
> have a BNC connector, you can just plug it in and it should
> be ok. There may be a jumper that selects the BNC or the
> AUI port on the bulkhead.
Cards like that have a built-in transciever for 10base2, and a general AUI
for whatever you'd like to hook up to (through a transciever).
However, the ethernet controllers for PDP-11 never have a built-in
transciever, and always only have the AUI connector.
On a DEUNA.... hahahahahahahahahahahaha.....
>
> Nice thing about the external AUI-to-xxx is that they usually
> have lights on them which makes debugging somewhat easier.
>
> If you really do need one, the AUI to 10-base-T or 10-base-2
> are available from JDR or JAMECO last time I looked. Haven't
> needed 10-base-1 so don't know if they are available. Also
> many electronic surplus shops will have a pile of them,
> which is where I usually get mine from.
I'ver got a pile of them too. He can have one for the cost of
postage. (Of course, I didn't pay enough attention to actually
see where he is from. If it's in Europe, he could always throw
in a local city map, too. :-)
bill
--
Bill Gunshannon | de-moc-ra-cy (di mok' ra see) n. Three wolves
bi...@cs.scranton.edu | and a sheep voting on what's for dinner.
University of Scranton |
Scranton, Pennsylvania | #include <std.disclaimer.h>
10BaseFL
-brian
--
"I mean Twinkies are good but getting shot really hurts."
-- http://www.thisisatastyburger.com/ --
> In article <3DC00400...@srv.net>,
> Kevin Handy <k...@srv.net> writes:
> >
> > The AUI to Ethernet converter is necesary if you only have a
> > 15 pin(?) connector on the back of the bulkhead. If you
> > have a BNC connector, you can just plug it in and it should
> > be ok. There may be a jumper that selects the BNC or the
> > AUI port on the bulkhead.
>
> On a DEUNA.... hahahahahahahahahahahaha.....
Actually, he said "deluna". I don't know if that's a DEUNA
or a DELUA, but it doesn't matter; both are AUI only. ;-)
AUI *is* ethernet. It is the standard drop cable for traditional
thick-wire (10Mb) ethernet, and needs to be connected to a thick
backbone via a transceiver or to an AUI concentrator, such as
a DELNI. (No one uses this stuff anymore.) It can also be hooked
to a twisted-pair ethernet or a thin-wire ethernet by using an
appropriate converter. They used to be available in most good
computer stores and catalogs, but they might be hard to find now.
I bought one a few years ago in MicroCenter for about $15.
> >
> > Nice thing about the external AUI-to-xxx is that they usually
> > have lights on them which makes debugging somewhat easier.
> >
> > If you really do need one, the AUI to 10-base-T or 10-base-2
> > are available from JDR or JAMECO last time I looked. Haven't
> > needed 10-base-1 so don't know if they are available. Also
> > many electronic surplus shops will have a pile of them,
> > which is where I usually get mine from.
>
> I'ver got a pile of them too. He can have one for the cost of
> postage. (Of course, I didn't pay enough attention to actually
> see where he is from. If it's in Europe, he could always throw
> in a local city map, too. :-)
>
> bill
The converters are about .5x1.5x3" in size (1x3x5cm) and plug right
into the AUI connector. (One of mine came with a short AUI cable
(aka ethernet transceiver cable), which is useful if the AUI connector
is buried inside the cabinet and hard to get at.) They are powered
through the AUI connector; no external power cube, etc. is needed.
The converters either have an RJ45 jack on the other end that you
connect to your hub or switch with a standard Cat3 or Cat5 cable, or
they have a BNC connector for thin-wire. Most (all?) have a switch
to select whether it generates the "SQO" (? it's been a while since
I looked at one...) signal. You normally want this on, unless you
are uplinking a DELNI to a TP backbone.
--
John Santos
Evans Griffiths & Hart, Inc.
781-861-0670 ext 539
AUI is part of the Ethernet spec, but it isn't *the* Ethernet. It's
how your machine connects to the transceiver. The transceiver is then
attached to the Ethernet.
Ethernet is defined as a particular type of bus using Carrier Sense
Multiple Access with Collision Detection (CSMA/CD). An AUI link isn't
an Ethernet because there is no multiple access to an AUI; AUI is
strictly a point-to-point link between a host and a transceiver. There
is no AUI carrier to be sensed, although AUI signals do inform the host
as to whether the transceiver detects a carrier on the Ethernet medium.
Similarly, there is no possibility of a collision on the AUI, because it
carries only unidirectional signals between a host and a transciver,
although AUI signals do inform the host when the transceiver detects a
collision on the Ethernet medium.
But wait, you might say. You can hook up multiple hosts via AUI to a
DELNI. Yes, that's because a DELNI functions as multiple transceivers.
Each individual AUI is an point-to-point link.
> [AUI] can also be hooked to a
> twisted-pair ethernet or a thin-wire ethernet by using an
> appropriate converter.
Specifically, an appropriate converter is an Ethernet transceiver. As
you say, those come in various flavors depending on the specific type
of physical Ethernet medium to which you need to connect.
>On 30 Oct 2002, Bill Gunshannon wrote:
>
> > In article <3DC00400...@srv.net>,
> > Kevin Handy <k...@srv.net> writes:
> > >
> > > The AUI to Ethernet converter is necesary if you only have a
> > > 15 pin(?) connector on the back of the bulkhead. If you
> > > have a BNC connector, you can just plug it in and it should
> > > be ok. There may be a jumper that selects the BNC or the
> > > AUI port on the bulkhead.
> >
> > On a DEUNA.... hahahahahahahahahahahaha.....
>
>Actually, he said "deluna". I don't know if that's a DEUNA
>or a DELUA, but it doesn't matter; both are AUI only. ;-)
>
>AUI *is* ethernet. It is the standard drop cable for traditional
>thick-wire (10Mb) ethernet, and needs to be connected to a thick
>backbone via a transceiver or to an AUI concentrator, such as
>a DELNI. (No one uses this stuff anymore.) It can also be hooked
>to a twisted-pair ethernet or a thin-wire ethernet by using an
>appropriate converter. They used to be available in most good
>computer stores and catalogs, but they might be hard to find now.
>I bought one a few years ago in MicroCenter for about $15.
The standard DEC AUI to thin-wire transceiver was the DESTA (We suspected
this was an acronym for Digital Ethernet Standard Trasceiver Adaptor). The
DESTA or other adaptor obtained its power from the DE**A host interface
(hence the reason for the fuse) down the AUI cable.
There are lots of 3rd party replacements for DESTA's available going to
thin wire (10Base5), TP (10BaseT ... since the DEC interfaces are 10 Mbps
adaptors you must connect them to a 10Mbps capable network), and Fibre
adaptors.
They are generally sub $30.
Heart beat is not available on DEC DESTAs, which doesn't stop a thin wire
only network ... but it does generate lots of carrier detect check
failures which by default log to the console. You have to disable the
logging the error though! Many 3rd party DESTAs will generate heartbeat,
eliminating that problem.
Stuart
Not quite true; at least one exception:
* The DESQA (S-box version of the DELQA) goes in a Q-bus slot and has
both an AUI connector and a transceiver with a BNC for Thinnet.
DEC shipped this in PDP-11/53 based S-box terminal servers.
Tim.
Oh well. That's typical. There's always this one thing to prove you
wrong. :-)
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: b...@update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
----------
Tim.
Well, Bill probably knows all that as well. That's what made him laugh in
the first place I guess. A DEUNA or even a DELUA with a BNC connector is,
well, umm, no analogy springs to mind actually :-)
BTW the BNC would've probably come on its own bulkhead panel, the panel
out-weighing the connector by a factor 25 or so....
Hans