In reply to a post by zzing123:

32 splices was chosen because each ONT could also have 4 connections, and 32x4 = 128, the maximum number of connections on a PON.

That's not the case.
Openreach run the FTTP network on a 32 way split. Not 32 x4.
GPON can be configured with a 128 way split but OpenReach don't do this.

They only provide a single fibre now and only with 1 port ONT's.

Not sure about bigger bandwidths though and if OR is even allowed to introduce contention as premises <> exchange has always been 1:1.

Contention isn't anywhere near 1:1 on OpenReach FTTP.
Prioritised rates are considerably lower than that.

https://www.btplc.com/SINet/SINs/pdf/506v1p6.pdf

That only lists the prioritised rate OpenReach give to the CP at the handover exchange.
Most ISP's will offer a lower prioritised rate to the customer.

In reply to a post by j0hn83:

In reply to a post by zzing123:

32 splices was chosen because each ONT could also have 4 connections, and 32x4 = 128, the maximum number of connections on a PON.

That's not the case.
Openreach run the FTTP network on a 32 way split. Not 32 x4.
GPON can be configured with a 128 way split but OpenReach don't do this.

They only provide a single fibre now and only with 1 port ONT's.

I might be wrong but they might of got mixed up with the Splitter Node can have up to 4 fibres going in and each of those fibres get split 32 ways resulting in 128 fibres.
But the way they said it looked wrong.

Plus the 4 fibres that are blown in for the legacy FTTP Install are just 3 spare fibres.

Paul

In reply to a post by zzing123:

Where? This is important as it's the basis of an SLA, so that we can demand that from our ISPs. And please, I'm not talking consumer trash here. I'm only interested in understanding how an Ethernet product can be sold over FTTP if OR can't guarantee 1:1 like they can with FTTC, ADSL and everything else they offer.

OR don't guarantee 1:1 on FTTC and don't sell ADSL.

In reply to a post by PaulKirby:

In reply to a post by CarlTSpeak:

The ONTs don't have 4 fibre links in. They take a single fibre.

I wonder if my 4 port ONT will handle another 3 Full Fibre 900 connection down that single fibre LOL

It probably wouldn't due to that was probably why they dropped the 4 port ONT to a single one, and I am not spending money just to find out LOL.

Anyone here got the Specs that they can share for the 4 Data, 2 Phone port ONT?

Paul

The GPON feeding that fibre is about 2.4 Gbit/s before overheads. The link between the GPON and the 4 Ethernet ports on the ONT is, I think, 2.5 Gbit/s.

I'll let you know how it manages with 2 x gigabit next week hopefully.

In reply to a post by CarlTSpeak:

EDIT2: If I'm honest, though, if you came to my house I would totally invite you in for a beer. It'd be an interesting conversation.

If I can travel to Yorkshire would be nice to invited me for a glass of white wine with my carer along with me (I don't drink beer or lager) But due to my disability - I don't think you wouldn't want to meet me in person as I do harm others in danger sometimes due to mental illness health

Edited by adslmax (Sat 25-Apr-20 16:36:50)

In reply to a post by CarlTSpeak:

The GPON feeding that fibre is about 2.4 Gbit/s before overheads. The link between the GPON and the 4 Ethernet ports on the ONT is, I think, 2.5 Gbit/s.

Ah, if that is the case the it would have issues with 4 lots then, not that anyone would need more than one or two connections of these speeds, plus if you can afford that many it might be worth looking at getting a fast business connection with redundancy fall back.

In reply to a post by CarlTSpeak:

I'll let you know how it manages with 2 x gigabit next week hopefully.

LOL, do let us know

Paul

In reply to a post by PaulKirby:

In reply to a post by CarlTSpeak:

The GPON feeding that fibre is about 2.4 Gbit/s before overheads. The link between the GPON and the 4 Ethernet ports on the ONT is, I think, 2.5 Gbit/s.

Ah, if that is the case the it would have issues with 4 lots then, not that anyone would need more than one or two connections of these speeds, plus if you can afford that many it might be worth looking at getting a fast business connection with redundancy fall back.

That single fibre contains the feed from every line in the PON.
It wouldn't matter if you had 4 fibres feeding 4 x 1 port ONT's or a single fibre feeding 4 ports on 1 ONT.
The available bandwidth is the same in both scenarios.
That's assuming the 4 port ONT has enough processing power to handle that much data.

For all you know there could be other neighbours on your PON who have already signed up to BT's Full Fibre 900 package.

There's a thread on kitz discussing the internals of the 4 port ONT.

https://forum.kitz.co.uk/index.php/topic,15674.0.html

It has a HiSilicon SD5113RBI CPU with an ARM11 core.

In reply to a post by j0hn83:

That single fibre contains the feed from every line in the PON.
It wouldn't matter if you had 4 fibres feeding 4 x 1 port ONT's or a single fibre feeding 4 ports on 1 ONT.
The available bandwidth is the same in both scenarios.
That's assuming the 4 port ONT has enough processing power to handle that much data.

For all you know there could be other neighbours on your PON who have already signed up to BT's Full Fibre 900 package.

There's a thread on kitz discussing the internals of the 4 port ONT.

https://forum.kitz.co.uk/index.php/topic,15674.0.html

It has a HiSilicon SD5113RBI CPU with an ARM11 core.

I know, I was just referring to the 3 spare fibres not connected to anything going between the CSP and the DP that's all.
As for the link to the kitz site, thanks I will take a look later

Paul

In reply to a post by j0hn83:

Prioritised rates are considerably lower than that.

https://www.btplc.com/SINet/SINs/pdf/506v1p6.pdf

Thanks for that. Commited Information Rates are a bit lower down (Section 2.1.6), although there's no such info on upstream, which is the more important bit.

But what an absolute meal they've made with it. The ONT is a lemon, stuffed into a turkey (intercepting and mangling Ethernet frames) and strapped to a white elephant (it's more expensive to bond FTTP into something usable than use EAD).

In reply to a post by zzing123:

In reply to a post by j0hn83:

Prioritised rates are considerably lower than that.

https://www.btplc.com/SINet/SINs/pdf/506v1p6.pdf

Thanks for that. Commited Information Rates are a bit lower down (Section 2.1.6), although there's no such info on upstream, which is the more important bit.

But what an absolute meal they've made with it. The ONT is a lemon, stuffed into a turkey (intercepting and mangling Ethernet frames) and strapped to a white elephant (it's more expensive to bond FTTP into something usable than use EAD).

Que?

How many offices need >220 Mbit upstream? What are you using to 'bond'? They can be bonded via PPP or anything that runs at layer 3, or higher?

What is the ONT mangling? Can't say I've noticed it cause any issues with the traffic I've been passing through it?