[chbot] Willowbank fibre network.

[Mark Atherton]

While I can see that fibre is probably the best engineering solution, it 
is also likely the most problematic/costly unless you can find the right 
person/source.

Mind you, that wouldn't stop me from pulling over and talking to every 
Enable truck, to see if you could sweet-talk them into helping out on a 
voluntary basis.

Saying that out loud, you might even approach Enable by phone and see if 
they would be willing to do the job in exchange for some good-will 
(marketing lit from Willowbank).

----

As a B plan, I would run CAT6 with overall screen below the electric 
fence, and drive a metal-ground-stake at one end of the run, and ground 
the foil. At the office end, get a decent (Cisco) POE power injector, 
and at the road-end a POE powered decent switch (also Cisco) to drive 
the 77m run.

So at this point, you are using high quality cable with controlled 
impedance, and controlled twist (common mode rejection ration [CMRR]) 
and high quality terminations (Cisco) with decent return-loss. You only 
need to run the connection at 100MBs - the CAT6 is specified for CMRR, 
not for speed. You have a powered buffer at the far end, care of POE, 
and electrostatic shielding care of a decent foil, and ground stake.

Not sure how the fibre terminal is powered at the roadside end, but I 
guess 48V is available from the Cisco.

Anyway, just another viewpoint, and there is no downside to talking the 
problem through with Enable before you go any further.

Just my 2c

-Mark






On 19/11/2019 2:49 PM, Daniel Powell wrote:
> Andy, thankyou again for the offer of assistance. I'll rerun the line and see how much irrigation and fibre line Willilobank will need. Given a google earth direct run of 77m I would think that there would be no more than 100m would be needed.
>
> I must admit that my knowledge of fibre networks harks back to that of ancient FDDI rings and nothing more recent. Wondered what the recommendations were in terms of fibre routers for ethernet over fibre.
>
> Again thanks to the club and the members that have assisted. I know the group has other projects to assist Willowbank and I know that all assistance there is greatly appreciated.
>
> Regards,
> Daniel.
>
> -----Original Message-----
> From: Chchrobotics <chchrobotics-bounces at lists.ourshack.com> On Behalf Of ceo at andygardner.com
> Sent: Tuesday, 19 November 2019 2:20 pm
> To: chchrobotics at lists.ourshack.com
> Subject: Re: [chbot] Willowbank fibre network.
>
>
> Hi Daniel,
>
> Given the electric fence, probably best to use fibre.
>
> I have two solutions available:
>
> Single mode G657A2 drop cable - 800m roll & 120m roll.
>
> Single mode blowable duct cable - about 4km IIRC.
>
> The drop cable isn't really suited for outdoors (and the other HAS to be inside a duct) so probably a good idea to tee up a donation of some thin PE irrigation pipe from someone to pull the cable through. How long is the run exactly?
>
> I also don't have any single mode SFP's, only a bunch of multimodes.
>
> I'm intending to install attachments on each end of my 75mm PE water main coming from my 3 phase pump out in a paddock so I can blow the fibre through that to get the network out to the pumphouse which is right beside where my 1st radio shack is being built. But I won't need 4km of fibre.
>
> The only other use I have for it would be to install a cladestine fibre run along 1.2km of Orion power poles back to the local Chorus box in order to get off VDSL.
>
> Cheers,
>
> Andy
>
> On 19/11/19 1:46 pm, Daniel Powell wrote:
>> I've recently been assisting Willowbank to form a small local LAN and trench in a new fibre broadband line.
>>
>> We've trenched into the main office and laid a section of cat 6 back to a portacom office from the main office. We're looking to enable network coverage over to the Kiwi House from either this portacom or fibre from the main office.
>>
>> To this extent the proposed copper runs above ground alongside an electric fence. I was thinking of running optoisolators at either end of copper, however a generous member of this group has offered fibre to the extent that would satisfy this run. I believe this to be a considerably better solution given the noisy environment.
>>
>> Willowbank have nobody to currently terminate this internal line. I wondered if there was someone in this group that could volunteer their services, or offer them for material cost to terminate a single run of fibre.
>>
>> Given their very limited current network, the run  to the kiwi house would enable video streaming, remote telemetry (with alerts) and data recovery of the incubators, kiwi weights and stop a clear majority of the sneekernet network that is required of the current system.
>>
>> Any help appreciated.
>>
>> Regards,
>> Daniel.
>>
>>
>
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