[chbot] Recommendations for fibre in CHCH
spencer.travers at gmail.com
Fri Mar 5 01:43:31 GMT 2021
The Enable street cabinets contain passive optical splitters and I do not
believe they require power.
The technology used is GPON, where the P is for passive.
In general terms, one fibre comes from the "exchange" and is passively
split at the cabinet (up to 32 ways?) to you and your neighbours. The ONTs
are responsible for multiplexing/demultiplexing in coordination with one
another. This is part of the reason they are owned by the network.
On Fri, Mar 5, 2021 at 1:17 PM Mark Atherton <markaren1 at xtra.co.nz> wrote:
> Thanks Helmut.
> I am familiar with VOIP, I have 2talk account and a collection of VOIP
> phones, and ATAs.
> I can deal with local power within the premises, but much more concerned
> that the cabinets back to the CO will still be powered (if indeed they
> need such).
> Presumably Central Offices still have huge backup batteries since they
> will be feeding cell-towers etc.
> So, really just trying to understand the whole mess.
> We do have two cell-phones, each with separate suppliers, so diversity
> there. Also have a means to connect mobile-data into the local network
> via a bridge, should we lose regular internet.
> If we are going to make changes, I am interested in learning about
> data-supply limitations before we push the purchase button, not after :)
> Regards, Mark
> PS thanks for those links; interesting reading.
> On 5/03/2021 11:40 AM, Helmut Walle wrote:
> > Sorry, Mark - I did not respond to the dial tone question initially,
> because you had already
> > mentioned that you would need backup power for your router to keep it
> going, and that the rest
> > of the system would need to have a backup power supply, too - so it
> looked like an acknowledged
> > and well understood issue.
> > But actually there may be a little bit more to it... as per Charles's
> comment below the dial
> > tone itself is generated by the router if the router does have analogue
> / POTS telephony ports
> > (many or probably most do, but if it's important check what you get or
> are buying). If it does
> > not you can still use a VoIP app on any terminal equipment (Mobile
> phone, tablet, laptop,
> > desktop PC) connected to a VoIP service via any Internet connection (you
> can for example run a
> > VoIP call using a mobile phone over a 4G/LTE based Internet connection
> just fine, even though
> > that is not the "standard" way of making voice calls on 4G). If you need
> to be able to connect
> > an old-style analogue phone you will either need a router with support
> for analogue phones, or
> > you can add an Analogue Telephone Adapter (ATA) that provides both the
> physical interface and
> > all the protocols required for VoIP calling. Or you can use a VoIP phone
> set to plug into your
> > LAN. Obviously any and all of these devices needs backup power.
> > Now there is a further point to consider: the fibre does not plug into
> the router. The fibre
> > will per definition only reach to the optical network termination (ONT).
> In principle this could
> > be anywhere, but in practice it will probably end up being either close
> to where the line enters
> > the house, or if there is a telecommunications cabinet (probably the
> case in all recent builds)
> > where all the various networs cables are ending (TV, LAN, phone, ...) it
> will be there. The ONT,
> > true to its name, terminates the optical network connection at the
> customer premises end, and it
> > provides a range of demultiplexing / multiplexing services and
> respective physical ports. It
> > will at least have an Ethernet port (should be Gbps), because that is
> needed to connect the
> > router, and it may well have analogue telephony ports, too. The ONT that
> came with my "default"
> > fibre install has 4 x Eth and 2 x Phone. Only one of my Eth ports is
> used to connect the router.
> > But I am not using the phone ports on the ONT at all, because the ONT is
> in the telecoms cabinet
> > in the garage, whereas the router is in the lounge, and that is where I
> need the phone. The
> > "default" router that I got also has two analogue phone ports...
> > Soooo - for me to have a dial tone during a mains outage, I would need
> backup power for both ONT
> > and router. And that is in addition to backup power for the phone
> itself, because, although it
> > is an "analogue" phone it actually is a wireless type that obviously
> also needs a power supply.
> > Now where I wrote backup power, none of these devices really need an AC
> mains supply, as they
> > all happen to come with a plug pack anyway... So a much simpler "UPS"
> consisting just of a
> > battery and a trickle / maintenance charger would be quite sufficient.
> > With all of that hassle in mind, and mains outages being quite rare
> here, a mobile phone may be
> > the better option for emergency calling.
> > Further to the technical discussion above, there are also regulations in
> place to set out
> > requirements for emergency calling services. These also include
> requirements for making
> > customers aware of the possibility of loss of certain services in the
> event of a power outage.
> > If you are interested in that the NZ Telecommunications Forum may be a
> starting point,
> > specifically the "Broadband Product Disclosure Code" and the "Emergency
> Voice Calling Services
> > Code":
> > I am not too familiar with the higher-level regulatory framework and its
> drivers, but the
> > Telecommunications Act could provide relevant information. Schedule 2A
> of the Act about the
> > Copper Withdrawal Code may be relevant, too. The finalised Copper
> Withdrawal Code itself has
> > just been published recently
> > Kind regards,
> > Helmut.
> > On 05/03/2021 08:32, Charles Manning wrote:
> > [...]
> >> Unlike with ADSL, you will not get a dial tone in a power outage.
> There is no ring voltage over
> >> fibre because it is non-conductive. That has to be recreated in-house
> by the fibre modem thingy
> >> (I assure you that is the correct technical term :-)). If that is not
> getting power then no dial
> >> tone. If you have a UPS then you should be good.
> >> -- Charles
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