Might get me on some kind of offender registry.
From: Adam Moffett
Sent: Wednesday, September 1, 2021 12:19 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] resistivity of cat5
+1
Use SS or blow ports up during thunderstorms. Those are the only two options.
Chuck should open a trenchcoat to reveal an assortment of surge protectors
inside.
On 9/1/2021 2:15 PM, Chuck McCown via AF wrote:
When he does this, just for shits connect the PSU at the beginning and bridge
all the middle stuff and just see if it works. I will be it will be just fine.
However I am certain he needs a ton of surge protectors at each end of all
ethernet runs.... just sayin’
From: Steve Jones
Sent: Wednesday, September 1, 2021 11:26 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] resistivity of cat5
thats what i suggested trying first, customer wanted the extender, irritating
he finally has caved now and will be putting a network rack in the midpoint
and is going to place a managed switch there instead of all this other
unsupportable cobbling. Sometimes we get a win.
On Wed, Sep 1, 2021 at 11:55 AM Adam Moffett <dmmoff...@gmail.com> wrote:
Maybe a dumb question, but has it already been tried without the extender?
400ft is beyond 100m, but not by all that much. It might just work without
any faffing around.
On 9/1/2021 11:16 AM, Steve Jones wrote:
I have a customer fixed on using
https://i.mt.lv/cdn/product_files/GPeRqg_190928.pdf to extend his epmp f300
radio run to 400+ feet.
if im calculating this right there will be about a 10v drop on the
24guage cat5, taking the 30v down to 20. If it does manage to keep the radio
powered i see it burning out the poe circuit.
hes fighting me on putting the cambium PSU at the midspan point and using
his own POE to power the extender.
Ive been overruled about telling the customer no, so its happening, but I
want to make sure my math is correct
using https://www.rapidtables.com/calc/wire/voltage-drop-calculator.html
24guage, 30v, .5 amp, 400 feet shows 10v drop. but im not sure about the
resistivity field
this is a guy who runs constant latency monitoring and initiates tickets
on every blip, so i see this radio move just becoming a nightmare with this
midspan extender in play
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