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Author Topic: Fibre First Rollout - Intake Exchange (Sheffield)  (Read 7040 times)

Black Sheep

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #30 on: December 20, 2019, 01:01:00 PM »

Alex .... I hear you and understand your issue .... but I don't have any involvement in public trackers, sites, estimators etc .... I just know the actual 'build' side of things I'm afraid ... ie: From paper to provision.

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Alex Atkin UK

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #31 on: December 20, 2019, 07:14:37 PM »

Alex .... I hear you and understand your issue .... but I don't have any involvement in public trackers, sites, estimators etc .... I just know the actual 'build' side of things I'm afraid ... ie: From paper to provision.

No problem, its good to know that once they actually start the physical work that its all hands on deck.  Its a large area covered, I'd imagine it will take some time and considering the time of year, weather and holidays no doubt hamper things a bit.

My exchange covers approximately 30,000 premises, so were talking ~250 PONs, at 2-3 months per PON.  Doesn't that mean you'd have to do up to 32 concurrently to get them finished in 2 years?
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Black Sheep

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #32 on: December 21, 2019, 12:28:28 PM »

I'm not involved in the work distribution as such, but I can't argue with your figures.

We have an enormous workforce of contractors (Morrisons, Telent, Lightsource, Kelly's etc etc), that swamp the PON's with people, once they receive the estimate numbers from the planners.

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CarlT

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #33 on: December 21, 2019, 03:12:04 PM »

Don't they just! They light up exchange areas with street works to replace poles, unblock ducts and get access to carriageway chambers when they start on them.

Most of an exchange gets done in a few weeks.
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Alex Atkin UK

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #34 on: January 02, 2020, 01:08:25 AM »

Ooooh it starts, duct unblocking showing up on one.network now. :p

Why no, I don't have anything better to do than a blow by blow of how quickly they roll out Fibre.
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CarlT

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #35 on: January 02, 2020, 01:31:18 AM »

From the original blue-print to fully commissioned it takes approx. 2-3 months for each PON (around 120 premises).
Yes, of course there's always grey areas, there always are .... such as MDU's (Multiple Dwelling Units), where the rules and regs (and wayleaves) change .... but on the whole .... !!

Please excuse my confusion but what are you calling a PON here BS?

PON usually means the area served by a single OLT port. Splitting to 128 premises is pushing optical budgets, doesn't really save that much money in the grand scheme and is potentially a bad idea when gigabit services are released and uptake increases.

Normal build specifications are up to 32 premises per PON though it can be pushed harder with higher power optics.

If the entire new build estate I will be living on is covered by a single port that port is in for some congestion come April  :lol:
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Black Sheep

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #36 on: January 02, 2020, 07:38:08 AM »

That is exactly what I mean by PON, too.

However, with a few tweaks. (You mention two figures for PON ... 128 and 32).

The regs around planning for a PON, or 'Spliiter Node' if you prefer, is 120 THP (Total homes passed). Each SASA is planned for 30 THP, but there is capacity for 32 as you say .... however, that requires managers authorisation to add one further THP, and his managers approval to take the last one ... so most jobs are planned to the 30 THP.

Yes, there are different power optics such as B+ or C+, but these are optimised based on distance rather than THP.  :)
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CarlT

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #37 on: January 02, 2020, 11:39:06 AM »

That makes perfect sense and my neighbours on the all FTTP estate will be happy. You need a couple of ports spare just in case one goes bad.

Thank you, Sir!
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Ronski

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #38 on: January 02, 2020, 01:25:05 PM »

Looks like things are happening in Ramsgate as well, lots of roadworks scheduled to clear ducts for spine cabling, even mentions PON.

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Alex Atkin UK

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #39 on: January 03, 2020, 01:30:04 AM »

Another one popped up today even closer to me, looks like they are working their way furthest away from the exchange inwards.

You honestly wouldn't expect so many blockages considering these must have been cleared when FTTC was put in, but I guess with all that rain we have had, land shifting is inevitable.

At least it shouldn't be like when Digital Region rolled out, they got delayed months due to hitting hard rock laying their ducting and needing to order specialised cutters.  Still sad that network was so badly managed its just left to rot now.
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CarlT

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #40 on: January 03, 2020, 10:38:59 AM »

A reminder that the 'spine' cable only had to go to cabinets for FTTC, ducts were cleared to aggregation nodes then they just needed to find paths to each PCP. Now they're having to deploy higher fibre count cables and the spine is going much deeper in.

To feed the cabinets that serve this address they had to take a different duct route from the most direct one. Wouldn't be surprised if there were a fair amount of workarounds and use of very small sub-duct.

An awful lot more unblocking of ducts to come: wait until they start on the access section feeding the chambers that in turn feed individual properties.  ;)
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Alex Atkin UK

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #41 on: January 04, 2020, 09:04:12 PM »

Does Traffic Management Only suggest areas they are blowing fibre?  I'd imagine if they are using those trailers with large spools it would make sense.
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CarlT

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #42 on: January 05, 2020, 03:23:34 PM »

It can mean that they need to install traffic lights at roads that aren't being worked on in order to control traffic flow. The traffic management may be related to another item of work within the carriageway nearby.

Much of the time blowing fibre through carriageway chambers would be marked as safe access to underground structures.

Using big trailers with big spools of fibre for footway chambers would be something they'd try to avoid to avoid having to pay permit / roadworks fees.

However you probably know this area better than I do. If there's not enough room on pavement/verge and they are deploying a big stretch of spine subduct traffic management will be required.

Either way if there're no adjacent roadworks that are excavation it is indeed install of underground infrastructure whether PON kit, fibre blowing or subduct, which is nice.
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Alex Atkin UK

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #43 on: January 05, 2020, 05:45:07 PM »

Ah I think I can see what they are doing, they have traffic management on the main roads as there are several blockages in the duct along a specific road.

I really shouldn't look at these things when my vertigo is playing up, my brain clearly wasn't working as its pretty obvious they are all related to each other with overlapping dates.
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CarlT

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Re: Fibre First Rollout - Intake Exchange (Sheffield)
« Reply #44 on: January 06, 2020, 07:05:22 PM »

Each SASA is planned for 30 THP, but there is capacity for 32 as you say .... however, that requires managers authorisation to add one further THP, and his managers approval to take the last one ... so most jobs are planned to the 30 THP.

I hadn't really thought about this before: are people aware what SASA means?

Splitter Array Sub-Assembly.

Quote
Splitter array sub-assemblies are assemblies of trays which store and protect optical splitters whereby incoming and outgoing fibers are stored per single circuit on separate organizer trays ready for splicing into the network.

Splitter trays.

There are also SOSAs - Splice Only Sub-Assembly. I think you can gather what those are.
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