Apollo stuff

[Bob Shannon]

Actually several other pins are active.  The token ring card can tell
when no cable is installed, so there are at least 2 cable detect pins.

----- Original Message ----- 
From: "Jochen Kunz" <jkunz at unixag-kl.fh-kl.de>
To: "General Discussion: On-Topic and Off-Topic Posts" 
<cctalk at classiccmp.org>
Sent: Wednesday, July 20, 2005 4:11 AM
Subject: Re: Apollo stuff


> On Wed, 13 Jul 2005 10:57:21 -0500
> "Director" <csmuseum at cse.uta.edu> wrote:
>
>> The Apollo cards I have have a strange connector. It appears to have
>> two coax and a half dozen wires in a DB form factor.
> It is called a 7W2 connector.
>
>> I did not get any cables, so I have no idea what connections are
>> actually used.
> Only the two coax connectors are used. They are simply ring in and out.
> You connect ring out of one machine to ring in of the next until you
> closed the ring. The cables are 75 ohm RG59.
>
>> I can't see how you could use a modern TR cable with that since it was
>> 4 wire shielded twisted pair. F connectors would imply coax.
> TR != ATR. Apollo Token Ring is a thing of its own, not compatible with
> the Token Ring that IBM and a few others used.
> -- 
>
>
> tschüß,
>       Jochen
>
> Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
>
>
>