[tech] Re: UCC uplink network upgrade
Nick Bannon
nick at ucc.gu.uwa.edu.au
Wed Jun 11 01:09:58 WST 2003
On Tue, Jun 10, 2003 at 09:40:03PM +0800, David Cake wrote:
> At 5:47 PM +0800 10/6/03, Nick Bannon wrote:
> >I hear the network upgrade is coming along - is this the plan?
> >
> > * GR Services will pull a fibre tube from the comms cupboard in the
> > Guild direct to the old computer lounge, Cameron Hall
>
> Yep.
>
> > * They'll blow through and terminate at least two pairs of fibre
> > (multimode or singlemode?)
>
> Not blow through (too expensive), multimode. Probably only
> one pair out to Cam Hall.
Ah.
Does the UCS link come into the Guild ground floor comms cupboard or
the new Guild comms room?
Will the fibre to Cameron Hall come into the Guild ground floor comms
cupboard or the new Guild comms room?
It's a pity about the blown fibre tubing - how much would that have
been?
Single pair (2 fibre) cable seems pretty rare - it's more likely to
come in bundles of 6 or 12 (or 36!). I do have a Gerards/Clipsal quote
of $2.15/m for the cheapest unprotected single pair cable, but 2 pair
is $3.12/m and it gets better from there. Even the 6 fibre
fibres-in-jelly-in-tube-in-armour-in-polyethylene-in-nylon protected
cable is under $8/m. ($8.03/m for the 62.5um stuff, the 50um stuff
might be significantly cheaper and probably preferable)
> > * They'll pull cat5e from the computer lounge to the UCC
>
> Nope. Cabling from Cameron Hall to UCC is UCCs
> responsibility. UCC is free to either pay for G.Rs to do it at the
> same time, or do it otherwise.
Fair enough.
> > * There will be a managed VLAN-able DLink 10/100 switch with two
> > 100Base-FX ports in the Guild comms cupboard and another one in
> > the old computer lounge
>
> probably only one pair in the Cam Hall switch. Actually three
> switches all up (one in CH, one in Guild ground floor comms cupboard,
> one in new guild comms room), one will have three fibre pairs, the
> others one each.
Are those just extra pluggable modules, or are they different model
switches with different numbers of ports?
> I realise that in the long run (a few years) we will probably
> wish we had more fibre pairs, but then we hope to have a much bigger
> tech budget in the next few years than we have this year.
> We only just come in under budget as it is.
> Cheers
> David
I appreciate that, but I'm not sure the UCC's resources have been taken
into account. We can certainly organise a cable across Cameron Hall,
but we might be able to do more, like scrounge up a whole switch, or
transceivers, or pay for an upgrade of the cable runs.
Pulling the cable between buildings is the real bugbear and I was
really keen to get us as close as we could to a fibre pair running
straight from the UCC clubroom all the way to the UCS uplink, via a
fibre patch panel if needed.
Even if that fibre is initially dark, I think that cable run has got to
have a chance of lasting through 8 years of upgrades rather than 2.
Nick.
--
Nick Bannon | "I made this letter longer than usual because
nick-sig at rcpt.to | I lack the time to make it shorter." - Pascal
More information about the tech
mailing list