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[S.Stephenson]

All if the cables are not going to fail all at the same time, there are mathematical witchcraft things they will do to establish what workforce they need if and when full Fiber is rolled out.

I'm just waiting for my quantum entanglement BT Genius Hub 54a with 1ms pings to andromeda,then I'll be waiting for them to enable the superposition it works perfectly on Huawei all I have is 0s and 1s that's unacceptable

[WWWombat]

All if the cables are not going to fail all at the same time, there are mathematical witchcraft things they will do to establish what workforce they need if and when full Fiber is rolled out.

Absolutely. The lifetime is a statistical thing anyway.

But remember that clock doesn't start with full fibre rollout. It started when BT commenced deploying spine fibre out of exchanges in 2010.

[burakkucat]

But remember that clock doesn't start with full fibre rollout. It started when BT commenced deploying spine fibre out of exchanges in 2010.

Surely that logic is also applicable to the fibre used in the telephony network, etc? 

[WWWombat]

Yes, but is that portion maintained by Openreach engineers? I thought they stuck to the access network.

[Weaver]

>  I'm just waiting for my quantum entanglement BT Genius Hub 54a with 1ms pings to andromeda, then I'll be waiting for them to enable the superposition it works perfectly on Huawei all I have is 0s and 1s that's unacceptable

 

Hilarious! Is there by chance another physicist about, perhaps? (Former (failed) theoretical physics student myself.)

[burakkucat]

Yes, but is that portion maintained by Openreach engineers? I thought they stuck to the access network.

No, it is maintained by Operate technicians (so I have been told). And yes, from the MDF outwards to the EU's NTE5. 

[kitz]

It gets rather confusing doesnt it?

Apparently BTwholesale own the backhauls from the exchanges when they designed 21CN.   This is straight forward and easy to understand.
Its just like how BTw owned MSIP the previous exchange backhauls.



However, it differs with NGA because Openreach have so many cabs which aren't connected to the same exchange as the PCP and instead feed from a head end exchange.
I think (and I could be wrong on this) but because the fibre from a cab may go to an exchange many miles away, these are the 'spines' that belong to Openreach from the Head-end exchange... ie they dont necessarily follow the same path as the traditional exchange backhauls.

[kitz]

To expand further... this is why I corrected hendry the other week when he pointed in his video what he reckoned was fibre running down an small country lane to his local exchange from off the A30. There may well have been (BTw) backhaul cable there feeding from say Exeter and then back to the Reading RAS...  but I doubt it will have contained any NGA fibre to his cab.   

Reason:  Any FTTC cabs in the area were directly connected to Bodmin which was the head-end exchange. 
Having looked at the BT S-VLAN data, I could see that Bodmin was serving as the headend for several other local exchanges.. and having then looked at the map... it would make more sense for Openreach geographically wise, to install a new 'spine' out of Bodmin that ran down the A38 and then branched up towards the Cardinham cabs, but could still cover surrounding exchange areas from the same spine.   It would be highly unlikely for them to install something that went up the A30 and then back down to just serve 2 cabs.   Instead Openreach create a 'new network' with nodes that branch out from the Head-end.

[S.Stephenson]

Hilarious! Is there by chance another physicist about, perhaps? (Former (failed) theoretical physics student myself.)

I'm afraid not just a chemistry graduate who takes a healthy intrest in theoretical physics that relates to either PC hardware or communications.

[niemand]

I agree, will probably see more centralized congestion at ISP's data centers and content providers will surely be applying data rate caps that folks can retrieve data at.

The core networks are fine. 400Gb Ethernet is on the way and routers supporting 400Gb per slot are already available.

With the average punter pulling 1-2Mb/s at peak times and usage only increasing by 40-60% per year I think we're okay from that point of view. Crunch points are likely to be somewhat closer to home.

[niemand]

In answer to the original question, it's easier to upgrade, you just put new kit either end, and the cost savings in terms of operational expenditure for Openreach over the current solution are huge.

Openreach's £2.5 billion figure for FTTC was capital and operational expenditure. £1 billion-ish of it operational. Powering the cabinets, monitoring and other things.

A pure fibre network allows Openreach to retire most of their exchanges. They can take an exchange's entire functionality and put it in what's not much more than a shed and sits there to collect fibre together and send it elsewhere, glorified massive patch panels.

No power bills for cabinets in the field. No maintenance costs for a geriatric copper network constantly corroding and being impacted by the elements. FTTP is 70-90% more reliable than copper.

Power bills for the exchanges that are left go down, no need to send voltages onto copper wires, just power OLTs and any networking kit.

The downside in the case of BT is that in the short term it involves taking money away from the poor shareholders, leaves less money in the Group for bidding on football rights and means they lose out on the FTTC assets they were hoping to sweat until the mid-late 2020s.

[willieaames]

In an era of increased attention towards cyber security, fiber-optic internet is touted as a cost-effective way of instantly increasing your Internet security. Intercepting copper cable can be performed by connecting taps to a line to pick up the electronic signals.

[GigabitEthernet]

The downside in the case of BT is that in the short term it involves taking money away from the poor shareholders, leaves less money in the Group for bidding on football rights and means they lose out on the FTTC assets they were hoping to sweat until the mid-late 2020s.

So really, it's BT actually having to be the infrastructure provider they claim to be.

[burakkucat]

. . . fiber-optic internet is touted as a cost-effective way of instantly increasing your Internet security. Intercepting copper cable can be performed by connecting taps to a line to pick up the electronic signals.

An optical fibre can also be easily intercepted and "tapped". Just ask NSA or GCHQ.

[NEXUS2345]

It is however much easier to detect a tap on fibre, as the light level usually suffers a significant loss. If appropriate hardware is used, then it is easily detected. Not only that, but quantum technology is being used as well nowadays, essentially emitting a photon with a quantum state, which when intercepted changes state, and can then be detected at the other end.