Networks Why NTL are stupid... again.

Not intentionally.. if you'd had said at the start 'you're right', then this whole messy business could have been avoided.

Besides, it's healthy to argue.. keeps you on your toes.

 

yep, btw i wasnt wrong i was just ranting about the wrong thing

 

Coupla things.

10baseT is possible at distances of around 150m on cat5 - the specification gives us the 100m limit but iis actually defined in electrical terms and for 10baseT is based on cat3 cable specs, cat5 generally has much better electrical characteristics and you can therefore squeeze better performance out of it, still best to stick to the EIA standard tho.

The limit in the EIA spec is 100m for twisted pair, however it recommends that you give 5m for patch cables at either end of the underfloor run giving the 90m limit.

Ethernet over coax wouldn't be 10baseT - it would either be 10base2 or 10base5 but would easily cover the distance either way.

A 10meg link between the buildings would be more than adequate if services were localised in the buildings and so only limited inter building traffic would traverse the link, say email and internet traffic [which is limited by your offsite bandwidth anyhow].

Finally, with all the discussion of cable personally I'd go for the wireless link - using appropriate kit you can get speeds up to 100meg without a problem and theres less chance of some bugger going through the cable with a spade.

Laying cable or fibre is all very well and good but unless you have ducting in place you need to dig a trench and lay the ducting and pull the fibre through which is all a pain in the butt. and them someone comes along with a jcb one day and wrecks your hard work.

J

 

point one: Our school does not, has never and will never run an RM network... quite franky they're crap.

point two: it isn't much a matter of getting the cable from one site to the other, mainly because the site the lines were in... is a big pile of debris. All that needs doing is the extra length of fiber optic cable from that bit to the new bit... heck there's even NTL phone lines over there it ain't too much of a hardship...

also being there's going to be some part of the network all the way across the road and a bit... there's going to be a lasery link between... hehe it's playtime... anyhow... they could install the lines over the road... in the village.. it ain't that hard... but anyhow just NTL don't want install the new lines in the old block don't know why... there isn't any question of being able to set a TA in the new block and some cable because there is no new block or whatever... and the lines going in probably got a bit toasty... so they/we can't just do it that way...

 

depends on the admin,

what setup do you use at your school then?

 

ive got just over 150m of cat5 to my mates house

that works fine a 100mbit its runs about 80% of its max speed

but if its going under gound dig the hole deep (your not ment to run cat5 outside neway)

mine was struck by lightning once it took out 3 switchs and a few cards

 

A proper one... ie.. Win2k servers and clients, a few XP terminals (laptops.. makes life easy I guess) running AD and formally 2 auth servers, clustered. storage servers were redundant also.

Now it's down to same setup just only one server at the moment.. but it handles...

and RM = teh crap0r

 

I agree, RM are really crappy. It does not matter about the admin on them they just generally fall over all of the time and just when you need them the most. At my old school we had 2 RM servers and a full RM network and it was constantly down. Pathetic. At my new school we have 5 novell servers running about 500 workstations all of the servers do different stuff, i.e. mail, proxy, teachers server pupils data etc etc. We run everything from 95 to XP and in the 6 months I have been here it has never fallen over. Novell is bloody fantabulous


G{u}ns

 

Just a thought,
I was reading somewhere that said all modern day ethernet
hubs, switches, routers, etc have signal repeating technology
built into them.

So couldn't you put an ethernet switch at the end of the 100m
network cable?