🚀 go-pugleaf

In article: <y$4ObJAcKIG3EwQE@ch-w.demon.co.uk>  John Chapple 
<jc@ch-w.demon.co.uk> writes:
> 
> In article <a$YK1FBq1FG3Ewks@jasper.demon.co.uk>, Mike Tomlinson
> <mike@jasper.demon.co.uk> writes
> >You will be highly unlikely to be able to terminate the cable 
yourself
> >due to the special tools needed, but many cable installation 
companies
> >are happy to test and terminate an already-installed cable (which 
is
> >what I used to do - get the cable laid, then get in a firm to 
terminate
> >and test it.)
> Does it *really* take an engineer something like 15 minutes to 
terminate
> an optical cable, (I understand it's quite a slow process, sticking 
the
> end in some sort of resin then smoothing it off with many? 
different
> grades of some sort of abrasive (apparently theres no quick 
solution))?
This depends on the fibre. For short runs (several hundred metres), 
there are simpler solutions, using 'plastic' fibre, where the ends 
can be cut and polished in only a few seconds. However on longer runs 
the attenuation of these is relatively poor, and glass fibres have to 
be used. The ends have to be at right angles, and polished, and this 
takes time. 'Better' polishing equipment reduces the time, and it is 
usually easier to do this 'off site', where automated equipment can 
do an end much cheaper.
 
> Not really related to subject, but, I understand that on an 
ethernet
> network if utilization goes above 25% this is regarded as 'a bad 
thing'
> (whatever that means) my 3com hub has peaked at 80% whilst 
installing a
> sp over the network on 2machines, just using netbeui BTW. Would 
this be
> a matter of concern on a real network?
It depends on the nature of the traffic. For instance you could have 
a 'point-point' network connection, and run at 80% with no problems 
at all. However in normal networks high utilisation, tends to imply 
collisions, and these are what really cause the problems...

Best Wishes

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