nanog mailing list archives
Re: Cable Operator List
From: Scott Helms <khelms () zcorum com>
Date: Tue, 2 Feb 2016 13:49:36 -0500
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
Current thread:
- Re: Cable Operator List, (continued)
- Re: Cable Operator List jamie rishaw (Feb 02)
- RE: Cable Operator List Graham Johnston (Feb 02)
- Re: Cable Operator List Daniel Corbe (Feb 02)
- Re: Cable Operator List Colton Conor (Feb 02)
- Re: Cable Operator List Scott Helms (Feb 02)
- Re: Cable Operator List Nick Hilliard (Feb 02)
- Re: Cable Operator List Scott Helms (Feb 02)
- Re: Cable Operator List Nick Hilliard (Feb 02)
- Re: Cable Operator List Scott Helms (Feb 02)
- Re: Cable Operator List Colton Conor (Feb 02)
- Re: Cable Operator List Scott Helms (Feb 02)
- Re: Cable Operator List Colton Conor (Feb 02)
- Re: Cable Operator List Scott Helms (Feb 02)
- Re: Cable Operator List Colton Conor (Feb 09)
- Message not available
- Re: Cable Operator List Colton Conor (Feb 09)
- Re: Cable Operator List Scott Helms (Feb 09)
- Re: Cable Operator List Colton Conor (Feb 09)
- Re: Cable Operator List Scott Helms (Feb 09)
- Re: Cable Operator List Richard Holbo (Feb 04)
- Re: Cable Operator List Colton Conor (Feb 05)
- Re: Cable Operator List Daniel Corbe (Feb 02)