5000' ethernet?

David Kelly dkelly at hiwaay.net
Wed Jul 15 21:07:54 UTC 2009

On Wed, Jul 15, 2009 at 10:27:35PM +0200, Michelle Konzack wrote:
> Hello David,
> Am 2009-07-15 14:47:18, schrieb David Kelly:
> > Not directly FreeBSD related, but how much of a chance is there that two
> > machines could communicate directly over 5,000 feet of cat5 with no
> > special hardware?
> I do not know hoe much a feet is in meters but AFAIK arround 0,3 which
> mean, you are talking about 1.5km or 1 mile ?

Yes, roughly a mile which is 5280 feet. Maybe less, but no more than a
mile. Won't really know until I get there and start running cable.

> There are inexpensive FiberOptic Transponder (I am using a bunch  of
> it from Transmode for my CWDM 1GE and DWDM 10GE network)
> The 100 Mbit Transponder cost  arround  600 Euro  (each)  and  for
> your 5000 feets you need only  an  inexpensive  FiberOptic  cable.
> EVEN  the cheapes one would transfer 1 Gbit at this distance.

What I'm not (yet) seeing is a fiber optic transceiver listed with
matching fiber optic cable. The transceivers seem inexpensive vs the cost
of the cable.

> > Are there any particular range extenders you have used and would
> > recommend for making this task a sure thing on the first try?
> > Perhaps I should put an inexpensive ethernet switch at each junction
> > to serve as a regenerative repeater?
> You have to use at least 3 Repeaters which NEED electricity. Do you
> know this?

Yes, of course.

> 5000 feet CAT5, 3 Repeater plus electric installation  cost  more,
> then the FiberOptic Cable with two Transponder.  And of course,  no
> one  can sniff traffic on FiberOptic and you have no worry about
> magnetic  fields disturbing your 5000 feet...

No one is going to sniff *this* one.

Am not finding sources of fiber optic cable as easily as I can find
fiber optic transceivers.

100baseT ethernet switches are about $25 each if one will serve as a
regenerative repeater.

Did I mention this is a temporary installation?

David Kelly N4HHE, dkelly at HiWAAY.net
Whom computers would destroy, they must first drive mad.

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