Re: Fwd: Rollup: Small City Municipal Broadband

[Scott Helms <khelms () zcorum com>]

Jason,

Yeah, that's what I figured.  There are lots of older PON deployments that
used the modulated RF approach.


On Sat, Feb 2, 2013 at 9:03 PM, Jason Baugher <jason () thebaughers com> wrote:

> 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.



-- 
Scott Helms
Vice President of Technology
ZCorum
(678) 507-5000
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