[187470] in North American Network Operators' Group
Re: Cable Operator List
daemon@ATHENA.MIT.EDU (Scott Helms)
Tue Feb 2 10:58:42 2016
X-Original-To: nanog@nanog.org
In-Reply-To: <CAMDdSzMrRhTRZzTEVEk_xTA2P45GgOBF9two1wf0AZJhXO-uRQ@mail.gmail.com>
Date: Tue, 2 Feb 2016 10:58:39 -0500
From: Scott Helms <khelms@zcorum.com>
To: Colton Conor <colton.conor@gmail.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
The biggest reason to not do EuroDOCSIS is logistics and dealing with
various TAC organizations versus a pretty small increase in per channel
performance (but not per hertz). I'd pretty strongly recommend against it,
just because you're going to run into issues ranging from buying modems, to
dealing with node vendors, to finding people who can do basic stuff like
plant balancing. You wouldn't think it would matter, but it throws people
off to see that extra channel bandwidth.
My 2 cents, buy CMTS/CCAP gear that's upgradeable to D3.1, ie CBR8, E6000,
or the big Casa unit, for the time being shoot for 24 channel downstream
bonding groups (24 * ~37mbps - overhead) which yields about 740 mbps
usable. That's plenty for most nodes, especially since you're not offering
video you can have many bonding groups since channel space isn't a problem.
Scott Helms
Chief Technology Officer
ZCorum
(678) 507-5000
--------------------------------
http://twitter.com/kscotthelms
--------------------------------
On Tue, Feb 2, 2016 at 10:47 AM, Colton Conor <colton.conor@gmail.com>
wrote:
> Daniel,
>
> Thanks for the wealth of information. What kind of speeds are you offerin=
g?
> How many customers are you putting on one of these boxes? What modems are
> you using?
>
> I would honestly perfer something that was hardened for outdoor use. Thin=
k
> garden style apartments. What is the best for something like that?
>
> Comparing DOCIS 3 to VDSL2, the modems and CMTS appear to be more cost
> effective per customer. G.FAST I have not seen pricing on, but I expect =
it
> to be more than VDSL2.
>
> Any reasons not to use EURO DOCSIS in the USA? Looks like it offers more
> speeds by using fatter channels. We don't plan on offering TV, but even i=
f
> we did couldn't we just start the channels at a higher range, and still u=
se
> EURO DOCSIS?
>
> On Tue, Feb 2, 2016 at 8:17 AM, Daniel Corbe <dcorbe@hammerfiber.com>
> wrote:
>
> > Hey Colton,
> >
> > We=E2=80=99re using small 16 channel CMTS systems for residential MDUs =
and
> > colocating them directly on premise inside of wiring closets and then
> > connecting them by metro ethernet. We=E2=80=99ve had great successes s=
o far with
> > this model.
> >
> > There=E2=80=99s lots of CMTS vendors.
> >
> > There=E2=80=99s tons of used Motorola BSR 64Ks on the market, but be aw=
are of the
> > lack of useful IPv6 features (like prefix delegation) in older software
> > releases. If you buy a box and want to run 7.x or 8.x, you=E2=80=99ll =
need to
> > relicense your downstream and upstream channels at some additional
> > arbitrary fixed cost.
> >
> > I=E2=80=99m personally fond of these things:
> >
> > http://picodigital.com/product-details.php?ID=3DminiCMTS200a
> >
> > You can only bond 16 channels together max though because that=E2=80=99=
s all the
> > box supports and you can=E2=80=99t bond across boxes; however, these th=
ings are
> > less than 4 grand if you buy them in bulk so they=E2=80=99re really fuc=
king easy
> to
> > just spam everywhere.
> >
> > Blonder Tongue makes a pizza-box style CMTS too:
> >
> >
> >
> http://www.blondertongue.com/shop-by-department/catv/ip-over-coax/docsis/=
euro-docsis/
> >
> > As does Harmonics:
> >
> > http://harmonicinc.com/product/cable-edge/nsg-exo
> >
> > All three are based on the same chipset, so the real differentiation is
> > price and firmware features.
> >
> > Then there=E2=80=99s Cisco.
> >
> > The UBR is a popular platform. And pretty soon there=E2=80=99s going t=
o be a
> glut
> > of UBR10Ks on the Market because Comcast is busy ripping their UBRs out
> of
> > production because they=E2=80=99re upgrading their cable plant to the C=
BR
> platform.
> >
> > Then the Arris C4, if you have deep pockets, is a modern version of the
> > BSR:
> >
> > http://www.arris.com/products/c4-cmts/
> >
> >
> > > On Feb 2, 2016, at 9:00 AM, Colton Conor <colton.conor@gmail.com>
> wrote:
> > >
> > > Well, maybe NANOG's not a bad place for this post then! I would like =
to
> > know more about the data-only side of CMTS systems, and who the main
> > vendors are.
> > >
> > > We have MDU properties where there is either old inside CAT3 phone
> wire,
> > or coaxial cable. We have looked and are very familiar with the multipl=
e
> > technologies that work over phone lines namely VDSL2 and G.FAST. Howeve=
r,
> > using the coaxial cable seems to be a much better solution than using t=
he
> > phone wires.
> > >
> > > So I am looking for compacts, low cost CMTS systems. Based on the
> specs,
> > I am looking for something at least DOCSIS 3.0 capable, with at least
> 16X4
> > output. Something with the ability to upgrade to software upgrade to
> DOCSIS
> > 3.1 would be nice, but I doubt that would be a low cost solution.
> > >
> > > Whats out there for small operators that don't want a large chassis
> > based system to feed an entire town with.
> > >
> > > So far I have found the
> > http://picodigital.com/product-details.php?ID=3DminiCMTS200a which seem=
s
> to
> > retail for under $5000.
> > >
> > >
> > > On Tue, Feb 2, 2016 at 7:48 AM, Daniel Corbe <dcorbe@hammerfiber.com>
> > wrote:
> > >
> > > > On Feb 2, 2016, at 8:42 AM, Colton Conor <colton.conor@gmail.com>
> > wrote:
> > > >
> > > > Are there any mailing lists out there dedicated for cable/MSO type
> > > > operators?
> > > >
> > >
> > > I'm curious about this too.
> > >
> > > I=E2=80=99m not a cable operator (in that I haven=E2=80=99t successfu=
lly registered for
> > a cable franchise yet) but I do operate a docsis network and I=E2=80=99=
ve
> > successfully negotiated the treacherous waters of obtaining and providi=
ng
> > content to my users.
> > >
> > > I=E2=80=99m still a bit green behind the ears but I could probably of=
fer some
> > measure of assistance if you have a specific question.
> > >
> > > -Daniel
> > >
> > >
> >
> >
>
