Re: [LUG] Ethernet over 100 metres

[Rob Beard <rob@xxxxxxxxxxxxxxx>]

Daniel Robinson <manipula@xxxxxxxxx> wrote:

Homeplug

On Jan 21, 2014 5:13 PM, "Philip Hudson" <phil.hudson@xxxxxxxxx> wrote:

Fibre. :-)

On 21 January 2014 16:56, Grant Phillips-Sewell <dcglug@xxxxxxxxxxxxxxxxxxxxx> wrote:

On 21 Jan 2014 16:52, "Rob Beard" <rob@xxxxxxxxxxxxxxx> wrote:
>
> Hi folks,
>
> We're looking at running an Ethernet to link two buildings which are quite a distance apart (around 220 metres, possibly around 230 metres maybe).
>
> Now I understand that the official limit on length of CAT5 is 100 metres, however I'm wondering if anyone has pushed the length any further?
>
> The thought I had was to run CAT5 to a waterproof box just under half way, in there have a 10/100 switch powered by POE, and run the rest of the cable to the other location (this might be about 130 metres). ÂI'm not sure if putting another switch on the cable run (again POE powered) would be an option due to it being outside (it could be tampered with, or eaten by a horse).
>
> Other than Ethernet (and wireless which probably won't work due to line of sight issues), what other options might we have?
>
> I've even considered 10Base2 coax cabling (is it still available?) or Thick Ethernet? (only ever seen that once at school back in the 90s, again is that still available? ÂCan it go faster than 10Mbit?) ÂOr... okay, maybe I'm verging on crazy now... Token ring?
>
> Fibre was considered but I'm not sure if it would be too fragile to run.
>
> I think ideally it would be nice to have 100mbit, but we could probably get away with 10 or 20Mbit/sec.
>
> Rob

I've had some success in the past with running a couple of Ethernet over power (Devolos) over about 300m. At the time the devices about would only support up to 85mbps, and today's can easily achieve 200mbps, so it may be worth considering.

Grant

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Sadly homepages aren't an option, both buildings are on separate electrical supplies.

However my Bing Fu kicked in and I found some interesting kit that does Ethernet over 75ohm coax.  Using RG59 cable it can reach up to 300 metres at 100Mbit which would be ideal.  Turns out it's actually for replacing analogue CCTV cameras with IP cameras.

It's about 200 quid for the adaptors and about another 90 quid for the cable.

Rob
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