In reply to a post by Bob_s2:

For Fibre none of that is really a problem. It is only a problemfor copper

Pardon? Did you really intend to reply to me with those two sentences?

I fail to see the relevance of your comment to my posting.

In reply to a post by MrSaffron:

Ducts themselves are not sealed to the elements, i.e. can flood.

Hmm, I think you are misunderstanding me. All ducts are sealed at the point where they enter a building.

Also, take a look at the ducting from a footway jointing box to a FTTC. You will find that the duct(s) that carry the fibre feed and the tie cables are filled / sealed with some form of epoxy resin. Hence if only two 100 pair tie cables are installed, that is the cabinet's limit -- unless further extensive civil engineering work takes place at a later date.

if they're sealed then it'll be a minor job to break open that seal at both ends , run through some more cable / fibre and re-seal. I'd be amazed if the entire duct was filled with resin - might as well just have buries the cables directly if that was the case!

Maybe at the point of entry to a building, but not for any distance, i.e. the ducting in the street is just a concrete box or plastic pipe that is hollow apart from any copper or fibre in it.

If the 2 mile of duct between an exchange and property were filled with resin then FTTC roll-outs would be so expensive they would never happen.

My comment is fact and not speculation.

Come on Andrew, look at what I posted in response to MHC's (throw-away) comment!

I have never mentioned anything about distance -- you are the first one to use that word.

Maybe at the point of entry to a building,

There is no "maybe" about it. It is a fact. The rest of your posting is irrelevant and is rather like the reaction I would expect from a certain TBB troll.

I know you are aware of the saying with regards to grandmothers and the sucking of eggs. You should also be aware of the saying with regards to holes, being in one and the stupidity of continuing to dig!

Facts:

(1) All ducts -- at the point of entry to a building -- are sealed. The sealing is not irreversible and is to prevent the ingress of gases, water, vermin & any other undesirable entities.

(2) All cable tunnels -- at the point of entry to a building -- are sealed. The sealing is not irreversible and is to prevent the ingress of gases, water, vermin & any other undesirable entities.

(3) The duct(s) between a FTTC and its footway joint box, which carry the tie-cables and fibre feed, are filled with something like epoxy resin (not foam filler). Once again, it is to prevent the ingress of gasses, water, vermin, etc, into the FTTC cabinet -- a cabinet that contains expensive, mains powered, electronic equipment. That filling appears to be irreversible without further civil engineering works.

Edited by burakkucat (Wed 22-Feb-12 14:12:07)

Can you try it on the two versions of the TBB Speed Test and provide a link to the results.

Here's the TBB speed test.



Hyperoptic's speed test a couple of minutes later shows:

Download Speed: 91053 kbps (11381.6 KB/sec transfer rate)
Upload Speed: 89856 kbps (11232 KB/sec transfer rate)
Latency: 5 ms
Wed Feb 22 2012 15:58:52 GMT+0000 (GMT Standard Time)

Not sure why there's a difference? Also can't see a second TBB speed test. How do I find it?

In reply to a post by burakkucat:

(3) The duct(s) between a FTTC and its footway joint box, which carry the tie-cables and fibre feed, are filled with something like epoxy resin (not foam filler). Once again, it is to prevent the ingress of gasses, water, vermin, etc, into the FTTC cabinet -- a cabinet that contains expensive, mains powered, electronic equipment. That filling appears to be irreversible without further civil engineering works.

I'm working on hearsay here, but I thought that the FTTC cabinets were installed, initially, with only the minimum in the way of tie cables. Once the cable was fully utilised, installations halted until a new tie cable could be installed.

Of course, it could be that the cables are fully present; they are just not wired in completely.

Flash based ... http://www.thinkbroadband.com/speedtest/broadband.html but you may need to cut and paste the figures.

For Hyperoptic's you go straight to their equipment, but to get the TBB test you go through Hyperoptic, to a peering point, from there across the Internet (maybe 1 or 2 hops or maybe a lot more) and then to TBBs test. That can cause some slowdown. As for the upstream, what do Hyperoptic offer "off network"? It might be 100Mbps within their networks but a limited figure when going elsewhere.

Seb or MrS may be able to shed some more light.