Re: Splitting serial cables ?

The place is Kanata not Kantata.

If you had done this in our data centres on site I'd have fried your ass,
and I mean fried.


"Neil Rieck" <n.rieck@xxxxxxxxxxxx> wrote in message
news:2ZnDf.1882$Iw6.130468@xxxxxxxxxxxxxxxxxxxxxxxx
>
> "Steven M. Schweda" <sms@xxxxxxxxxxxx> wrote in message
> news:06012920442024_20331674@xxxxxxxxxxxxxxx
> >
>
> [...snip...]
>
> > As RS232 signals generally run positive and negative, I'd be a bit
> > suspicious of the advice from folks who suggest adding diodes to the
> > system. (Of course, having seen some before, I'd be more than a bit
> > suspicious of _any_ advice on electricity (or physics, in general)
> > offered in this forum.)
>
> Except that I actually did this on a PDP-11/73 using only two diodes. We
had
> an LA-120 console in the computer room and a VT100 about 25 feet away in a
> secondary equipment room. You are right about positive and negative
signals
> but, if memory serves, only the negative signals are really required over
> short distances. Now I must point out that there is no way an RS-232 or
> RS-423 signal bastardized in this way will be able to support the rated
> distance/speed charts. I should also mention that we never started up any
> CRT-based apps on the VT100.
>
> p.s. you may think that only software people hang out in this news group
but
> many of us started out life in the hardware world. I was DEC-qualified to
> work on many PDP and VAX products. Most of my DEC training (except the
diode
> mod above) came from Bedford, Maynard, and Kantata.
>
> Neil Rieck
> Kitchener/Waterloo/Cambridge,
> Ontario, Canada.
> http://www3.sympatico.ca/n.rieck/links/cool_openvms.html
>
>


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