nanog mailing list archives

Re: Cable Operator List


From: Colton Conor <colton.conor () gmail com>
Date: Tue, 9 Feb 2016 14:32:58 -0600

Yes, I looked at CASA, but their small unit is the C1G, which is an 8x8 max
DOCSIS 3.0 unit. Plus they want a high price point, almost quadruple what a
16X4 Pico Digital or Harmonic's unit cost. Not seeing the value or specs
there to justify it.

On Tue, Feb 9, 2016 at 2:26 PM, Steven Shalita <sshalita () comcast net> wrote:

Have you looked at Casa Systems?  They some smaller density MDU stuff.

-Steve

Sent from my iPhone. Please excuse any errors.

On Feb 9, 2016, at 12:20 PM, Colton Conor <colton.conor () gmail com>
wrote:

Scott,

Have any idea which exact vendors and model numbers are within this price
range? So far I have just found mini CMTS systems like the Pico and
Harmonic's. Both of these are a 16x4 configuration, but no mention of
remote MAC+PHY nor DOSIS 3.1. Then their is Huawei's solution, but still
I
think that's more based on C-DOCSIS. Searching the vendors websites you
recommended show no results for remote MAC+PHY in a small format.

On Tue, Feb 2, 2016 at 2:44 PM, Scott Helms <khelms () zcorum com> wrote:

Colton,

D3.1 gear is just coming online right now.  If you're going to go with
the
smaller PHY+MAC approach I'd just make sure the company has plans to
update
their boxes to 3.1 in a decent (your judgement) amount of time.  Don't
expect any 3.0 box to be software upgradeable to 3.1, the hardware is
quite
different.  The PHY+MAC boxes are _generally_ < $10k and some are
talking
about ~6k.

All the vendors we've listed so far have plans for 3.1, but I don't
have a
timeline for any of them.  Right now the market is still trying to
decide
how modular CMTS will be rolled out, remote PHY, remote MAC+PHY, or a
combination.  For example, Cisco is (for the moment) betting that remote
PHY economics will be compelling for the larger operators, while Arris
is
doing both approaches.


Scott Helms
Chief Technology Officer
ZCorum
(678) 507-5000
--------------------------------
http://twitter.com/kscotthelms
--------------------------------

On Tue, Feb 2, 2016 at 3:31 PM, Colton Conor <colton.conor () gmail com>
wrote:

Is a remote MAC+PHY the same thing as a Distributed Converged Cable
Access Platform (D-CCAP) solution like Huawei is pushing? Is DOCSIS 3.1
even out, or am I looking for something that does not exist yet?

Are these remote MAC+PHY devices in the under 10K price range that
these
smaller all in one CMTS platforms are?

On Tue, Feb 2, 2016 at 12:49 PM, Scott Helms <khelms () zcorum com>
wrote:





On Tue, Feb 2, 2016 at 1:24 PM, Colton Conor <colton.conor () gmail com>
wrote:

Yes, we are in the USA. So based on everyones recommendations, I am
going to stay far away from EURODOCSIS. I was told be a vendor that
Arris and other USA FCC certified cable modems could easily be
flashed to
EURODOCIS mode, so I did not think the CPE side was that big of a
deal (is
that even true). I was not aware that there were so many differences
besides just the channel width.

I wish this were the case, it would make my life easier.  The problem
is
that there is a diplex filter that prevents the upstream burst from
being
heard by the downstream receiver and for cost purposes all the D3 and
earlier modems have fixed filters.  What that means is that a
EuroDOCSIS
modem can (sometimes) be flashed to use 6MHz channels, but the
reverse is
NOT true.  In any case we don't recommend using Euro modems that are
flashed to US standards in production (nor do the vendors) because
you'll
see much more upstream leakage.



So, assuming we are talking about DOCSIS only (and not EURODOCSIS),
what do you recommend? I like the idea of being able to upgrade to
3.1, but
not sure if there are any small systems capable of this? By small I
mean
something that could feed less than 100 units, and be economical to
do.
Cable has the advantage of cheap modems, so it's really the CMTS
side.

In that case I'd definitely go with a remote MAC+PHY.  That's the only
way you're going to get a good price point and decent performance
unless
you want to use the secondary market, which actually isn't a bad idea
right
now.  A used 7225 with 8x8 blades is pretty cheap, but it's
centralized
CMTS that would cover ~3k subs.


Please remember I am only interested in data internet services over
this plant. Something that works for garden style layouts where I
can bring
fiber or coaxial to the side of a garden townhome that has between 4
to 16
units inside of it. The reason I requested a harden outdoor unit is
that
most all of the garden style properties have both the phone
and coaxial drops on the outside of the building. There is no central
closet or room. Plus we are in the south, so hardened for the
heat exposure makes sense.

A remote MAC-PHY (or pre remote MAC-PHY, ala mini CMTS) sounds like
what I want. I will check into Huawei and Gainspeed. Who else makes
these?

In no particular order, Arris is or will be, Teleste (Euro vendor
trying
to break into the US),  Sumavision, Altera, and ton more I can't
remember.
Come to one of the SCTE shows (it's in Philadelphia this year) if you
want
to be deluged with them :)






On Tue, Feb 2, 2016 at 11:24 AM, Scott Helms <khelms () zcorum com>
wrote:

Nick,

Absolutely, if your plant is in Europe or one of the other areas
(lots
of Africa and the middle East is like that) that adopted EuroDOCSIS
I'd
agree wholeheartedly.  I didn't see Colton say where they're
located, but
all North America is the US flavor so that's what I assume on NANOG.

That being said, the best thing that seldom gets mentioned about
D3.1
is getting us to unified channelization.
Scott Helms wrote:
That very small upside for an extreme downside.Trying to hire
someone
to work on your system with Euro channelization, not to mention
buying
amplifiers and passives is a huge PITA.

... if your plant is in the US.

I have customers in Europe who
decided to do US DOCSIS and they universally wish they had used the
local "flavor".

as you say, eurodocsis works well in europe.

3.1 will be a major improvement when it materialises.

Nick




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