From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <009e01c486bf$d1166d80$7dec7d50@SOMA>
From: "boyd, rounin" <boyd@insultant.net>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu>
References: <20040820115259.12e1c14c@garlic.apnic.net><4697c901caf1f3aef38bcb285334b6ea@collyer.net>
	<20040820130920.2a08bf59@garlic.apnic.net>
Subject: Re: [9fans] datakit
Date: Fri, 20 Aug 2004 16:13:00 +0200
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> In Australia, centrex models meant that things like this ran 2x or more
> the apparent distance for rural subscribers. All telecoms north of
> Gladstone in Queensland (Boyd will doubtless chime in with detail on how
> sick this is) run via a concrete bunker next to the Wolloongabba cricket
> ground here in Brisbane, and with Queensland 2000km long, that means to go
> from the Cairns GPO to the Cairns bank incurs the same RTT as a
> trans-pacific dialogue, when its 2km across town.

totally possible.  oz is ~the size of the US but the population
density it nowhere near it.  rough figures?  20M people in
oz and 300M people in the US.  in oz this is made worse
'cos the 90% of the population lives on the coast.

[moving to wireless, as an example]

last i heard, GSM was going to be dropped in favour of
CDMA.  GSM is just not suitable in oz 'cos you need
this 'hexaboard' of BTS's that are within 35km radii.

35km is nothing in oz.  i know people who will drive
that far (or further) to get to work.

in the bush, there's just no point sticking up GSM BTS's
'cos there might not be one GSM mobile within its 35km
radius.

btw: the 35km figure (iirc) comes from the timing correction
constraints so that the 600us mirco-burst winds up at the
mobile and BTS at the right time; GSM is TDMA.

bbtw: i've tested it to 35km [normandie to jersey] and
at 300km/h [TGV] clocked with a GPS.