🚀 go-pugleaf

In message <GpWikKA07XVNFw0G@bancom.co.uk> on Fri, 11 Feb 2011 18:24:52 +0000
 tony sayer  <tony@bancom.co.uk> wrote:
> 
> >A well populated street cabinet is pretty much full using RG6. RG11 is over 
> >twice the 
> >cross sectional area plus, of course, having a greater bend radius, so I don't 
> >think it 
> >would work on a mass scale. Designers usually avoid RG11 unless it's absolutely 
> >necessary 
> >for a couple of extra long drops. On the other hand, I don't recall ever having 
> >my head 
> >inside a Cambridge Cable cabinet, so they might have done something different 
> >...
> >
> 
> It might be that they sometimes use RG11 for internal wiring rather then
> the drop top the subs premises..
> 

I can't see how that would work. The only reason for using RG11 is the lower attenuation 
on longer than normal subscriber drops.

The difference on a short run would be negligable and, if you were referring to internal 
wiring in the Cambridge Headend, I would definitely say no! Apart from it not being 
logical, I couldn't have failed to notice it on one of my many visits there! 
> 
> >Didn't they use those plastic street cabinets? Their 19" racks were a pain 
> 
> Yes they use metal ones quite well built called Telco cabs by them, and
> the local end distribution cabs were those horrible Green plastic ones
> which more often than not have the covers come loose..
> 
> >because they 
> >used an unusual shelf support system, so you had to beg, steal or borrow the 
> >supports if 
> >you wanted to install any new kit ...
> 
> Can't quite remember that long while ago now;!..

They are really hefty chunks of metal!

The 'business' end is only about 15cm long[1] but the important part is that the fixing 
is at the extreme width of the cabinet. I gets there by means of a triple bend 'neck' 
which is no nore than about 5cm wide - hence the thickness.

End on, a pair look like this:

 |_             _|
   |_         _|


There is no other way of fixing a support into these cabinets unless you used these 
brackets!

[1] Two pairs, at front and rear were needed if you were attempting to to install 
something long and heavy like a Cisco router single handed, so that it was certain to 
remain on an even keel while you bolted it onto the front of the rack. Even so, the front 
edge of the first pair of brackets was so far back in the cabinet that it was difficult 
to judge when it was safe to lower the router which, of course, completely blocked your 
view!

-- 

Terry