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 <khe...@zcorum.com> wrote: > > > > > On Tue, Feb 2, 2016 at 1:24 PM, Colton Conor <colton.co...@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 <khe...@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 >>> >> >> >
