[160858] in North American Network Operators' Group
Re: Muni fiber: L1 or L2?
daemon@ATHENA.MIT.EDU (Edward Dore)
Fri Feb 15 18:25:58 2013
From: Edward Dore <edward.dore@freethought-internet.co.uk>
In-Reply-To: <511C3A4A.7050401@necom830.hpcl.titech.ac.jp>
Date: Fri, 15 Feb 2013 23:25:31 +0000
To: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 14 Feb 2013, at 01:13, Masataka Ohta wrote:
> Edward Dore wrote:
>=20
>> Sadly, despite this being challenged with both the telecoms
>> regulator (Ofcom) and advertising watchdog (ASA), for some
>> reason both seem pretty happy with the utter farce that is
>> advertising BT/OpenReach's VDSL based Fibre To The Cabinet
>> and Virgin Media's Hybrid Fibre Coax networks as "fibre
>> optic broadband".
>=20
> Sadly, it is impossible to say FTTC not "fiber optic broadband",
> because it is "broadband" (at least with today's access speed)
> with "fiber optic".
Then why would you not also consider bog standard ADSL to also be "fibre =
optic"?
>> We were supposed to be getting FTTP where I live last March,
>> but for some reason BT silently scrapped that plan and now we
>> are getting FTTC this March apparently...
>=20
> Obviously because it makes L1 unbundling difficult.
With BT/OpenReach's FTTC and FTTP there's no difference in terms of =
layer 1 unbundling - it's impossible with either as they are both shared =
mediums aggregated before the exchange.
FTTC is fibre from the local exchange to the street cabinet where there =
is a VDSL DSLAM feeding the last part of the copper loop through to the =
property. This provides up to 80Mbps down and 20Mbps up.
FTTP is GPON from the exchange right through to the property completely =
independent of the existing copper loop. Currently this provides up to =
330Mbps down and 30Mbps up.
There is also an "FTTP on-demenad" option where if you are in a FTTC =
area then you basically pay for BT/OpenReach to extend the fibre to your =
property and provide the FTTP service. This is expensive though as you =
foot all of the excess construction charges. Apparently the average cost =
is going to be around =A31500.
In either case, OpenReach are required to provide "open" access at the =
exchange to any companies wishing to make use of the local =
infrastructure and provide competing services to BT. Pricing for this is =
controlled by the regulator, Ofcom. Both FTTC and FTTP are provided as =
VLANs over gigabit Ethernet interconnections in the Exchange
BT/OpenReach is doing a large FTTC deployment across the UK (two thirds =
of the properties by spring next year I believe), and are starting to =
roll out FTTP in some areas having been conducting trials since early =
2010. I believe that the deployed BT/OpenReach FTT* footprint now covers =
approximately 13 million properties.
The area where I live was one of those listed as getting FTTP last =
March, but then that was silently scrapped at the last minute for some =
reason never specified and now they are starting to roll out FTTC to us =
for this March (only recently announced).
It does seem that they are actually doing it this time at least, as the =
new street cabinets have started appearing and pavements are being dug =
up, but it's obviously disappointing that we were switched from FTTP to =
FTTC along with a year's delay. The rest of the city was always supposed =
to be FTTC and that was rolled out successfully last March.
Edward Dore
Freethought Internet=
