Bear in mind that each port on the CBT has it's own fibre link back to the splitter. Could be some problems in those links that limit the number of live ports. It's not beyond the bounds of possibility that some of the ports are on different splitters and there is an OLT port capacity issue back at the exchange.

One does have to wonder if it would have been cheaper to put the splitters in the CBT saved a whole bunch of splicing costs at the expense of more OLT ports.

In reply to a post by jabuzzard:

It's not beyond the bounds of possibility that some of the ports are on different splitters and there is an OLT port capacity issue back at the exchange.

No CBT should ever be fed from multiple splitters for any reason. It would break Openreach's systems. When a PON is split the entire CBT is moved to the new tray.

In reply to a post by jabuzzard:

One does have to wonder if it would have been cheaper to put the splitters in the CBT saved a whole bunch of splicing costs at the expense of more OLT ports.

I assume this was considered by Openreach, then by other altnets and dismissed as the approach didn't make sense. In fact, just seen another poster inform that they tried this and stopped a while back.

I am not aware of any PON provider that either have splitter in CBT only or use multiple, cascaded splitters in their builds now.

In the case of XGSPON this would be even more of an issue as the 'standard' segment size for those is 64 premises passed.

Cascaded splitters would keep segment size sane but at the cost of more points of failure wiping out multiple customers. A fusion splice isn't even a 5 minute job and once done they're good for the foreseeable. Presumably offsetting this against costs of alternative approaches ensured Openreach, CityFibre, G.Network, Virgin Media and others took the approach they did. The only time the splitter is next to the CBT is when there is no CBT, but a cabinet with lines of SC connectors to plug into.

Edited by XGS_Is_On (Fri 27-May-22 19:11:51)

In one of the Openreach videos explaining their FTTP installations they specifically say they do not connect ports on the same CBT to different splitters. From this I presume that whilst 1:32 is the maximum split there may well be some splitters which are not fully utilised as a result.

The original BFT deployments used chained splitters but that was abandonded at least 6 years ago in favor of a single level split and intermediate joints between splitter and CBT as required.

This also allows CBT ports to be reallocated for EAD use by disconnecting a fibre in the splitter node and splicing it to a spare upstream fibre back to the aggregation node, and there to one of the P2P BAU spine fibres back to the exchange.

In reply to a post by tdw42:

In one of the Openreach videos explaining their FTTP installations they specifically say they do not connect ports on the same CBT to different splitters

And the obvious reason is it would be a nightmare for provisioning, because the ports on the CBT would not be interchangeable; things would go wrong if the engineer plugged into the "wrong" port on the CBT when connecting a new service.

You say it's only been a week or so since the first went live - when my estate of ~80 premises went live last Christmas oddly some of the houses went live on the BT Wholesale checker about 2 weeks before the rest.

It didn't really seem to align to multiples of 30/32 as in if a splitter was finished before the others (I know they are not always full) but not sure on CBTs as they are underground and I only payed close attention to mine.

Worth a regular check in case they get added.

In reply to a post by kommando:

Well you have possibly been mis labelled in the database.

Use this contact form stating that neighbours can get FTTP but you can't.

https://www.openreach.com/forms/fibre-broadband-avai...

They should reply in 2 or 3 days either telling you the database will be updated or why you have been missed.

Thanks for everyone’s help so far, it appears as if the plot thickens as this is the reply I’ve just had from openreach (in which I clear stated we were connected to the same pole/DP but didn’t supply the DP number unfortunately)

Thanks for your recent enquiry via the Openreach website about getting faster broadband.

I’ve?looked into?your enquiry and can see that the neighbours those are getting fibre to the premises(FTTP) services they might have different distribution point (DP) and your property is included in our one of the future roll out plan.

However, the great news is that we will have some fantastic connectivity options for your home. I can see the equipment you’re connected to is getting an upgrade. This will give you the option of ordering fibre to the premises(FTTP).

Our engineering work is due to start in the beginning of July 2022 and will take several months to complete. I’m sorry we can’t give you a more specific date at this time but once the work is completed you’ll be able to place an order with your chosen service provider.

We’d love to keep you up to date with our progress. To receive any future updates please go to our fibre checker, input your postcode, choose your address from the drop-down, then scroll past the availability information and complete the Gigabit Fibre form and we’ll update you once plans change www.openreach.com/fibre-broadband.

Openreach doesn’t provide phone, broadband or TV services directly to anyone so to get these services you’ll need to contact a service provider to find out about the packages they can offer you and the speeds that you’re likely to get.

I’ve opened another ticket on the same form quoting the DP number so hopefully that gets something moving.

As a further update

Below is a photo of the areas I’ve managed to get data on…

The link lines can all order and the yellow line can’t order. It seems very odd indeed,

https://ibb.co/52Gffcx

they might have different distribution point

And could not be bothered to check !!!

In reply to a post by kommando:

they might have different distribution point

And could not be bothered to check !!!

It certainly smells funny, I’ve replied to it and given them the DP number…

The map I posted seems to make it pretty clear everything around is live just a stretch of houses all with the same postcode not able to order.

Reads to me like they're coming back over the summer to in-fill