[160245] in North American Network Operators' Group
Re: Fwd: Rollup: Small City Municipal Broadband
daemon@ATHENA.MIT.EDU (Jason Baugher)
Sat Feb 2 21:04:05 2013
In-Reply-To: <CAMrdfRw58cKLrhAm9T4YH68o6ezeVQyWjMBgTBhYE_3sd74nwQ@mail.gmail.com>
Date: Sat, 2 Feb 2013 20:03:52 -0600
From: Jason Baugher <jason@thebaughers.com>
To: Scott Helms <khelms@zcorum.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Feb 2, 2013 3:33 PM, "Scott Helms" <khelms@zcorum.com> wrote:
>
......
> This is not correct. DOCSIS is an MPEG stream over QAM or QPSK modulation
> and there is nothing about it that is compatible to any flavor of PON. In
> fact if you look at the various CableLabs standards you'll see DPoE (
> http://www.cablelabs.com/dpoe/specifications/index.html) which lists how a
> DOCSIS system can inter-operate and provision an PON system. If you look
at
Jay may be referring to something I alluded to earlier, what Calix refers
to as RF overlay. The RF signal from the traditional cable system is
converted to 1550nm and combined onto the PON before the splitter with a
CWDM module. Certain model ONT's split the 1550 back off and convert back
to an RF port.
