In reply to a post by Whitehall11:

Waiting list is usually down to the final commissioning stages at the headend exchange - i.e. there simply may be no headend unit hahah

Have you seen that before then?

Must admit I’ve never before seen “waiting list” against WBC FTTP in the BT checker…usually it’s either listed in the table or it’s simply not!

Also entries for WBC FTTP and FTTPoD are typically mutually exclusive on the results table - you’ll see one or the other but never both entries.

Very odd is this one!

Hmmm...that's an interesting question.

I captured the text below the table, and one interesting line says:

WBC FTTP text

"For all ADSL and WBC Fibre to the Cabinet (VDSL or G.fast) services, the stable line rate will be determined during the first 10 days..."

So, could the WBC FTTP section in the table simply be a typo/mistake, and should it read WBC FTTC? (is this another name for G.fast)? If so, the Downstream Line Rate following this in the table that says "up to 1000"...could this be an auto filled in section based on the (possible) incorrect WBC FTTP product listing? I am guessing that WBC FTTC (G.fast?) doesn't have anywhere near the downstream rate of 1000 Mpbs?

Thanks...

In reply to a post by Pheasant:

Must admit I’ve never before seen “waiting list” against WBC FTTP in the BT checker…usually it’s either listed in the table or it’s simply not!

We have seen threads on FTTP Waiting List before on here Linky

No don’t think it’s a typo in that way. That’s just a standard remark where FTTC/VDSL is available.

Any G.fast would be shown immediately below the VDSL lines in the main table, in the same section - that is all FTTC products shown together at the top.

It could however be some sort of database anomaly - or it could be something funky going on with the OLT / headend provisioning. Possibly even a lack of CBT ports, if they’re all used (don’t suppose you can see?) or a capacity issue elsewhere on the PON.

If FTTP was available as a new connection - then it would simply say “ FTTP is available and a new ONT may be ordered.” as a line under the main table. The last column for ‘install process’ on the WBC FTTP line would also have an entry.

Ah OK back in February I see kitcat answered that as being a PON constraint - “this would only occur when the final splitter or fibre DP is over subscribed”

Noted for future reference! Thanks

In reply to a post by Pheasant:

Ah OK back in February I see kitcat answered that as being a PON constraint - “this would only occur when the final splitter or fibre DP is over subscribed”

Noted for future reference! Thanks

Often an FTTP waiting list is accompanied by a message under the availability table saying something along the lines of "the network is at capacity, a new ONT cannot be ordered".

That's usually the case when a DP is full.

A splitter being full is much less common.
OpenReach can and do go above 32:1 if homes order multiple services.

They provision the splitter as 32:1 but if everyone on the splitter had a 4 port ONT and took 2 services then the splitter would be doing 64:1.

In reply to a post by j0hn83:

They provision the splitter as 32:1 but if everyone on the splitter had a 4 port ONT and took 2 services then the splitter would be doing 64:1.

That's not true. An ONT (even a 4-port ONT) is a single device with a single optical interface. 32 ONTs of any type is still a 1:32 split.

In a GPON network the ONT can provide multiple user services, either as separate physical ports, or as separate VLANs on the same port (Openreach don't do this). But it's the same optical uplink used.

You might for instance have four ports active with 80/20 services, and this would still use less bandwidth than a single service of 1000/110.

Worded wrong perhaps.

The general point I was making being the same though that the splitter/PON isn't limited to 32 services.

Yes I thought the same as candlerb, it’s a fine line - the distinction between an optical GPON connection on the PON and the number of subscriber connections on the PON. It’s not a 1:1 ratio.

In reply to a post by candlerb:

In reply to a post by j0hn83:

They provision the splitter as 32:1 but if everyone on the splitter had a 4 port ONT and took 2 services then the splitter would be doing 64:1.

That's not true. An ONT (even a 4-port ONT) is a single device with a single optical interface. 32 ONTs of any type is still a 1:32 split.

In a GPON network the ONT can provide multiple user services, either as separate physical ports, or as separate VLANs on the same port (Openreach don't do this). But it's the same optical uplink used.

You might for instance have four ports active with 80/20 services, and this would still use less bandwidth than a single service of 1000/110.

Do you know if the old Huawei multi-port ONT and for that matter upcoming (Nokia 4-port ONTs) expose an HSGMII (ie full 2.5 Gbps downstream bandwidth) interface on the electrical/switch fabric side of the optical interface or if they soft limit it to an SGMII (~1 Gbps) to share across the switch?

Edited by Pheasant (Thu 16-Sep-21 14:06:36)