what nodes? (was [Cu-wireless] Memory for nodes)

Jack McCabe jmmccabe at uiuc.edu
Fri Jan 24 01:06:28 CST 2003

I can get discounted rates on radios and antennas though a company I used to
work for in Hillside, IL.  Tell me what you need and I'll get a price for
you.  By the way, I'm new to the list and I am willing to help on any
installs or whatever projects come up.  I'm no expert but I'm willing to
learn.  I'm a member at WEFT (90.1FM community radio) and that's how I heard
about you guys.  I hope I can get involved. Thanks.

~Jack McCabe

jmmccabe at uiuc.edu
202 E Chalmers
Champaign IL 61820

-----Original Message-----
From: cu-wireless-admin at lists.groogroo.com
[mailto:cu-wireless-admin at lists.groogroo.com]On Behalf Of David Young
Sent: Thursday, January 23, 2003 11:42 PM
To: CU - Wireless
Subject: what nodes? (was [Cu-wireless] Memory for nodes)

What nodes? =)

Seriously, we have more install candidates near Urbana High School than
we have nodes. And then there is the 400 block of Green Street, where
I think we could install at three more homes, easy.

Incidentally, I am still looking for an inexpensive local distribution,
and I am not finding it. Any ideas?

We have cable and connectors for a few installs.  We need radios and

I want to survey on Ivan's roof just as soon as the snow has melted from
it. I forgot to check it this AM. Ivan's is an iffy install because we
will have to use a lot of cable or an outdoor router. The outdoor router
is more than we can afford.

The LinkSys WET11 is a tiny ethernet<->wireless bridge with decent
output power and mediocre receive sensitivity (but mediocre beats
crappy any day). Detaching its antenna exposes an RP-SMA connector.
If it will not already tap ethernet for DC power (not the laboratory
namesake, but the electricity), then we can build it a tap using plans at
nycwireless.net. Then we can buy/build the injector.  I think that if we
"pull a ham" and put it in Tupperware with holes punched for ethernet
and radio connector, then we've avoided excessive cable losses on the
cheap. Maybe....

We still need to attach a PC to provide the routing/forwarding function,
and we should to verify certain properties of the WET11, such as its

  1 power requirements (50 feet Cat5 turns a lot of electricity
    to heat, but a 48VDC injector could cook the thing at 75)
  2 its radio properties (I think that it is superior to our WMP11's,
    with 100mW and -83dB RX sensitivity, but maybe I am wrong)
  3 its configurability for channel and SSID (I prefer that it is
    Web- or SNMP-configurable. I have read that it will start a Web
    configurator if you give it an IP by DHCP, but seeing is believing.)
  4 its ability to handle an IBSS merge (this should not be a problem
    if it has a Prism MAC with recent firmware, but you never know)
  5 temperature range
  6 software reliability (does it conk out after N hours or Q packets?)

If somebody on the list already owns one of these, maybe you will put
it through its paces? If not, I will front the lesser of $50 or half the
purchase price for a WET11 if somebody will evaluate its suitability by
those criteria.


On Thu, Jan 23, 2003 at 10:34:43PM -0600, Perry Melange wrote:
> Hey, I have just gotten 19 pieces of 72 pin SIMM memory for us to use on
> the nodes.  Do we want to get together some time soon and set up a few
> computers?
> Perry
> --
> Perry Melange      "Make things as simple as possible, but no simpler."
> pmelange at null.cc.uic.edu                              - Albert Einstein
> http://null.cc.uic.edu/~pmelange/resume
> _______________________________________________
> Cu-wireless mailing list
> Cu-wireless at lists.groogroo.com
> http://lists.cu.groogroo.com/cgi-bin/listinfo/cu-wireless

David Young             OJC Technologies
dyoung at ojctech.com      Engineering from the Right Brain
                        Urbana, IL * (217) 278-3933

Cu-wireless mailing list
Cu-wireless at lists.groogroo.com

More information about the CU-Wireless mailing list