new phone system

[Roger Mills]

But that doesn't work without mains power, whereas POTS does!

[Tim Streater]

So, with FTTP, your fibre-pair goes from your house ... to where?

Remember that even in 2008, when I retired, the kit we'd been working with could, in principle, push 96 channels @ 10Gbps down a fibre-pair.

[Andrew]

No more spoofed numbers on Caller-id

[charles]

In my case to a pole mounted splitter - feeding 2 other houses and then underground. It might simply go to the local FTTC cabinet.

[Tim+]

Why not?

Tim

[Rod Speed]

Nothing like that in our new housing subdivisions, what you lot call an estate and they are all FTTP.

[Andrew]

Not sure what the technical details are but I have heard comments from BT and other people that only when the switchover to digital occurs in 2025 (unless delayed) will it be possible to stop number spoofing.

It is intentionally allowed now because it was originally intended for trustworthy organisations to hide the number they are calling from or replace it with a generic switchboard number.

[Rod Speed]

In fact free on some of our $15/month mobile plans.

[Rod Speed]

When you don't have mains power, you use your mobile,, stupid.

[chop]

And unpowered splitter/joiner.

[chop]

Fraid not. voip is FAR easier to do spoof numbers on Caller ID.

[chop]

That's obvious.

That's bullshit. voip was in fact the reason it became so easy to do.

And that will still be required, stupid.

[SteveW]

It also doesn't work when your phone points are fed from your master socket at the front of the house and you new Virgin router is at the back, with an inaccessible underfloor section between them.

[John Rumm]

Over what distance without repeaters OOI?

From what I understand of the current FTTP solutions many seem to be structured with an Optical Line Terminal (OLT) based at a comms hub, it will feed a multi gigabit fibre out to a passive splitter. That will in turn feed typically 32 properties where it terminates in an Optical Network Terminal. Total bandwidth will usually be at least ~2.5Gbps downstream and half that upstream.

Send and receive data sharing the same (mono mode) fibre with frequency division multiplexing (or WDM in fibre speak!)

Data to subscribers being effectively broadcast to all of them (each stream being addressed for one ONT, and protected by encryption). The return data form each subscriber then being interleaved with that from others using TDM and sent back to the OLT

The design allows for quite long line lengths in total. Typically quoted at at least 20km, but you can push a bit further with forward error correction.

[Tim Streater]

Probably about 60km using single mode fibre, as I recall. But we were leasing dark fibre for building a pan-European network, so these typically went captital-city-centre to capital-city-centre, from the likes of COLT, Deutsche Telekom, etc. There were PoPs in London, Paris, and similar. The repeater issue was handled IIRC by the fibre provider, so what we saw was e.g. a fibre pair going from our PoP in London to our Pop in Paris. Each end terminated in Alcatel kit and then the IP circuits were provisioned on top of the optical layer and terminated in large routers.

The exception to the capital-city business was CERN, where we had a PoP, because CERN needed many 10Gbps circuits to various universities around Europe where LHC data was being processed. These were provisioned on the same fibres, so such a circuit might go Geneva-Paris, enter the Alcatel kit, then be optically patched onto the London fibre - thus not hitting the IP router in Paris at all. Separation of circuits on the fibre was done by using different light frequencies.

Still, that was 15 years ago. Dunno what they do now.

[Joe]

“Throughout history, poverty is the normal condition of man. Advances which permit this norm to be exceeded — here and there, now and then — are the work of an extremely small minority, frequently despised, often condemned, and almost always opposed by all right-thinking people."

R A Heinlein

[SH]

The LHC I once saw misprinted in a news website as a Large Hardon Collider instead of Large Hadron Collider!

[chop]

So move the router to the front, stupid.

[The Natural Philosopher]

To a regional concentrator up to 25km away. Everything else up to there is passive splitters/combiners. No power needed

I think they go higher than that now

[The Natural Philosopher]

Not normally. They can use the green cabs as passive distribution points but they need no power

Conceptually your fibre runs to a regional hub, which is powered. But the local splitting is all passive