[HamWAN PSDR] VOTE: Baldi LAN expansion and Rattlesnake link

Bart Kus me at bartk.us
Mon Jun 1 12:01:25 PDT 2020

I'm not sure what there is in there.  Heard vague recollection of a pair 
of CAT5s in there, but not with any certainty.  This is why we need to 
go survey the place.  I would expect their grounds to be tied given the 
power system changes, and the conduit to be bonded. Worst case though we 
can omit the shield as CAT5 Ethernet is only magnetically coupled (has 
isolation transformers) and uses differential signaling.

I'm kind of hesitant to introduce fiber to HamWAN where it's not 
absolutely necessary.  We have enough problems with proper RJ45 
terminations, never mind asking people to re-terminate fiber if 
something breaks.


On 6/1/2020 10:01 AM, Tom Hayward wrote:
> On Sun, May 31, 2020 at 11:35 PM Bart Kus <me at bartk.us 
> <mailto:me at bartk.us>> wrote:
>     Kenny, a great question that I forgot to make clear. There is
>     already conduit between all the buildings.  I confirmed tonight
>     that it's got sufficient capacity to run an extra CAT5.  I think
>     we only have to fish a ~150ft run between the middle building and
>     the bunker, as there are spare CAT5s in the conduit between the
>     middle building and north building, so that should just be
>     plug-n-play.  The trenching to the bunker was done earlier this
>     year as a response to the awful power outages we suffered this
>     winter.  The north building is now tied into generator control
>     (and possibly power?) of the bunker.
> Does the conduit already carry a conductor? I would avoid installing 
> anything but fiber between buildings to simplify grounding/isolation.
> Tom
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