[TriLUG] at&t fiber

[Wes Garrison via TriLUG]

They install an "ONT" (Optical Network Terminal) on the outside of the
house that hands it off to a CAT 5e Ethernet straight to your "modem".

Unfortunately the NVG599 router AT&T provides does not support true
passthrough, only a sort of hybrid DMZ mode, so using your own router
behind it is not as seamless as it could be.
(google for NVG599 passthrough and you'll see what I mean; I think we've
discussed that on this list before)

It authenticates with 802.1x so you really can't replace it, even though
it's standard Ethernet.  Yay for taking standards and making them not
standard!

AT&T and Google both use PON technology
<https://en.wikipedia.org/wiki/Passive_optical_network> to do this, which
means they literally split the fiber.

The downstream bandwidth uses WDM (Wave Division Multiplexing), so everyone
get's their own wavelength and essentially gets full "switched" bandwidth
back to the OLT (Optical Light Terminal), where it splits.

AT&T uses TDM (Time Division Multiplexing) for the upstream bandwidth,
though, so you're sharing upstream with everyone on your split; usually
about 32 houses, I think.  PONs can be split up to 128 ways, but I think
AT&T only goes up to 32 ways - maybe 16, I can't recall properly.

Google uses WDM for upstream too, so you effectively get all of your
bandwidth in both directions.

I'm not sure Google Fiber actually exists, though.

-Wes

_________________________________
Wesley S. Garrison
Network Engineer
Xitech Communications, Inc.
phone:  (919) 260-0803
fax:       (919) 932-5051
__________________________________
"Lead us not into temptation, but deliver us from email."

On Wed, Sep 6, 2017 at 12:18 PM, karl flores via TriLUG <trilug at trilug.org>
wrote:

> Q. Did you/they have to rewire house to get fiber to your devices?
>
> On Wed, Sep 6, 2017 at 12:06 PM, Ron Kelley via TriLUG <trilug at trilug.org>
> wrote:
>
> > Have AT&T fiber for about 1yr now (in Apex) - full GigE connection
> ($75/mo
> > I think)
> >
> > Just ran Speed test again.  Still getting 720Mbps download and 915Mbps
> > upload.  Really like the service.
> >
> >
> > -Ron
> >
> >
> >
> >
> > On Sep 6, 2017, at 11:50 AM, Hilmar Lapp via TriLUG <trilug at trilug.org>
> > wrote:
> >
> > I may have missed earlier reports about the experience from folks who
> > adopted AT&T Fiber. They’ve laid the fiber in our neighborhood a year ago
> > and of course now they aggressively try to sell it to everyone.
> >
> > I can’t say their pricing is aggressive – we’re not cable TV customers so
> > their bundles including TV don’t appeal to us, and internet-only is about
> > the same as with TWC/Spectrum 300Mbps – but they claim that their
> bandwidth
> > is way more consistent high at >300 Mbps than TWC/Spectrum cable. Even if
> > that were to be true right now, it seems like that could well be
> explained
> > by the network not being as crowded yet as far from everyone has signed
> on
> > yet.
> >
> > Any experience of folks out there with AT&T Fiber? If bandwidth was
> indeed
> > great and highly consistent at first, did it stay that way or
> deteriorated
> > as more people in the neighborhood signed on?
> >
> >  -hilmar
> > --
> > Hilmar Lapp -:- lappland.io
> >
> >
> >
> > --
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>
>
>
> --
> Karl Flores
> IT Specialist
> Directl: 619-796-1329
> Fax:  858-605-4265
>
>
> "There are those who look at opportunities and contemplate limitations.
> There are those who seek opportunities and discover limitations. And there
> are those who find opportunities and challenge their own limitations."
>
>
>
> "My children are footprints that prove I existed"
>
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> This message was sent to: Wes <wes at xitechusa.com>
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