Cable Operator List

Daniel Corbe dcorbe at hammerfiber.com
Tue Feb 2 16:08:45 UTC 2016


In-line below.

-Daniel

> On Feb 2, 2016, at 10:47 AM, Colton Conor <colton.conor at gmail.com> wrote:
> 
> Daniel,
> 
> Thanks for the wealth of information. What kind of speeds are you offering? How many customers are you putting on one of these boxes? What modems are you using?

We’re using Arris modems because we have the least amount of signal-related issues with them.  We’ve had to drop to 64qam because portions of our network runs over the air and we run into SNR issues at 256qam on the downstream.  This is important because it basically halves our available bandwidth.  I quoted some figures below based strictly on channel width but the reality of our situation is we see about half those numbers.

We don’t cap our users.  Every modem on the network can bond all 16 channels if it’s capable and it wants to.  We’ve got one plan.  Which means they can burst as high as they want within reason.  Every month we’re in contact with the top talkers in each sector and we ask them to curb their bandwidth usage.  

With this model we get about 50 to 75 users to every 16 channel CMTS we deploy.  In a 200 unit apartment building, we’d deploy 4 to 6 boxes.   On a 2000 user airbox station, we’d deploy about 20 of them.  

There’s also one more consideration.  Our TV service is IPTV.  Since we’re not pumping DVB-C or DVB-S signal down the cable, we’ve got nearly a full Ghz of spectrum with which to use for DOCSIS channels.  This gives us a lot of flexibility to just add additional CMTS when we begin to run into capacity issues.

> 
> I would honestly perfer something that was hardened for outdoor use. Think garden style apartments. What is the best for something like that? 

I’m sure someone somewhere makes an environmentally hardened CMTS but I’m not currently aware of any at the moment.  Most of my equipment sits in wiring closets. 

> 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 if we did couldn't we just start the channels at a higher range, and still use EURO DOCSIS? 

EuroDOCSIS would be a better option if you’re looking to maximize bits per hertz and have enough spectrum to play with.  You get 8Mhz channels for 6Mhz channels which means at 16 channels you’ll get 800Mbit/sec to a modem instead of 640Mbit.

> 
> On Tue, Feb 2, 2016 at 8:17 AM, Daniel Corbe <dcorbe at hammerfiber.com> wrote:
> Hey Colton,
> 
> We’re 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’ve had great successes so far with this model.
> 
> There’s lots of CMTS vendors.
> 
> There’s tons of used Motorola BSR 64Ks on the market, but be aware 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’ll need to relicense your downstream and upstream channels at some additional arbitrary fixed cost.
> 
> I’m personally fond of these things:
> 
> http://picodigital.com/product-details.php?ID=miniCMTS200a
> 
> You can only bond 16 channels together max though because that’s all the box supports and you can’t bond across boxes; however, these things are less than 4 grand if you buy them in bulk so they’re really fucking 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’s Cisco.
> 
> The UBR is a popular platform.  And pretty soon there’s going to be a glut of UBR10Ks on the Market because Comcast is busy ripping their UBRs out of production because they’re upgrading their cable plant to the CBR 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 at 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 multiple technologies that work over phone lines namely VDSL2 and G.FAST. However, using the coaxial cable seems to be a much better solution than using the 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=miniCMTS200a which seems to retail for under $5000.
> >
> >
> > On Tue, Feb 2, 2016 at 7:48 AM, Daniel Corbe <dcorbe at hammerfiber.com> wrote:
> >
> > > On Feb 2, 2016, at 8:42 AM, Colton Conor <colton.conor at gmail.com> wrote:
> > >
> > > Are there any mailing lists out there dedicated for cable/MSO type
> > > operators?
> > >
> >
> > I'm curious about this too.
> >
> > I’m not a cable operator (in that I haven’t successfully registered for a cable franchise yet) but I do operate a docsis network and I’ve successfully negotiated the treacherous waters of obtaining and providing content to my users.
> >
> > I’m still a bit green behind the ears but I could probably offer some measure of assistance if you have a specific question.
> >
> > -Daniel
> >
> >
> 
> 



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