[Cu-wireless] simple design proposal

[David Young]

I should mention that for protection from lightning, it may be necessary
to buy a surge suppressor for our coax, and also to produce a good ground
from the suppressor. I think it is ok to ground to the third prong on
an indoor electrical outlet. It is important we protect the borrowed
equipment, but also we need to protect Laura's, Maiko's, and Zach's homes.

Dave

On Fri, Jul 26, 2002 at 04:14:50PM -0500, David Young wrote:
> 
> Here is a two-part proposal for an initial network that I think we can
> build this summer. It will involve stations at Maiko's, Laura Huth's,
> and Zach's because they are near to each other. All the stations will
> run identical CD-ROMs, just like our previous plan, but the CD-ROM will
> select its IP numbers differently, and it will not use any IP schemas
> or any notion of a "pod," "uplink," or "customer" network.
> 
> We will use the network 10/8. At Zach's house is the Internet gateway,
> which will NAT 10/8 to one or more numbers.
> 
> Stations will choose the host part of the IP number for an interface by
> bitwise XORing the first 24 bits and the second 24 bits of the MAC number
> on the interface to fill the host bits. If bitwise XORing the halves of a
> MAC number do not produce different IP numbers, we will choose a better
> hash than that, but collisions should be rare for most choices of hash
> function, since I don't think we'll exceed a dozen stations any time soon.
> 
> Routing is by OSPF. Stations will treat their wireless interfaces as
> point-to-multipoint interfaces to 10/8. Every station is in area 0.
> 
> Station hardware will consist of one Dell with Linksys WMP11 attached
> with several feet of LMR400 to an omni antenna. You can get a 5.5 dBi
> antenna with hardware for pole-mounting for only $50. You can buy an 8
> dBi antenna for just $60. We already have a few poles and roof/chimney
> mounts; we can buy more at Radio Shack for cheap.
> 
> How does this proposal sound?
> 
> Dave
> 
> -- 
> David Young             OJC Technologies
> dyoung at onthejob.net     Engineering from the Right Brain
>                         Urbana, IL * (217) 278-3933
> 
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-- 
David Young             OJC Technologies
dyoung at onthejob.net     Engineering from the Right Brain
                        Urbana, IL * (217) 278-3933