Re: DWDM Mux/Demux using 40G Optics

[Colton Conor <colton.conor () gmail com>]

Luke,

I agree, I would be talking about getting one with the 1310NM special port
for the QSFP+ input that emitts 1270-1330nm light, and then say 4 client
ports on different channels than that light range.

On Mon, Jun 19, 2017 at 3:40 PM, Luke Guillory <lguillory () reservetele com>
wrote:

> If their 1310 passes them I would have to think you can't use is with
> other client ports that would fall within the window. Here is a graph
> showing those 4 for the 40g it seems.
>
> http://public-wordpress-kkc.s3.amazonaws.com/wp-content/
> uploads/2014/07/Graph1.jpg
>
>
>
> -----Original Message-----
> From: NANOG [mailto:nanog-bounces+lguillory=reservetele.com () nanog org] On
> Behalf Of Colton Conor
> Sent: Monday, June 19, 2017 3:32 PM
> To: Mike Hammett
> Cc: nanog list
> Subject: Re: DWDM Mux/Demux using 40G Optics
>
> I guess that makes sense. The plus or minus some is the question. FS is
> claiming their 1310 port support QSFP+, which is 1270, 1290, 1310, and 1330
> combined. I understand you can us 1310, but I am still scratching my head
> as to how they all one minus and two above 1310 to work. Of course they
> don't have any datasheets to show the range either.
>
>
>
> On Mon, Jun 19, 2017 at 3:17 PM, Mike Hammett <nanog () ics-il net> wrote:
>
> > I'd imagine they vary based on vendor, so you'd have to check with the
> > specific vendor in terms of absolute technical specifications.
> >
> > A 1310 and 1550 port only allow those channels plus or minus some,
> > manufacturer dependent.
> > An expansion port passes everything not used by that device.
> >
> > Some manufacturers are even configurable pre-order, so you could get
> > exactly what you needed (other than multiple 40G channels).
> >
> >
> >
> >
> > -----
> > Mike Hammett
> > Intelligent Computing Solutions
> > http://www.ics-il.com
> >
> > Midwest-IX
> > http://www.midwest-ix.com
> >
> > ----- Original Message -----
> >
> > From: "Colton Conor" <colton.conor () gmail com>
> > To: "Faisal Imtiaz" <faisal () snappytelecom net>
> > Cc: "Mike Hammett" <nanog () ics-il net>, "Luke Guillory" <
> > lguillory () reservetele com>, "nanog list" <nanog () nanog org>
> > Sent: Monday, June 19, 2017 3:14:19 PM
> > Subject: Re: DWDM Mux/Demux using 40G Optics
> >
> >
> > Thanks for the answers. From the sounds of it, no one knows the real
> > difference between the expansion port, 1310 port, and 1550 port. For
> > real world applications, I would assume the monitor port would be to
> > plug in a handheld meter, and see which channels are coming through
> > that node without breaking the ring. Not sure if their would be a
> > monitor port for both directions is you were using a OADM?
> >
> >
> > On Mon, Jun 19, 2017 at 2:38 PM, Faisal Imtiaz <
> > faisal () snappytelecom net
> > > wrote:
> >
> >
> >
> >
> >
> > Answers in-line ...
> >
> >
> > Faisal Imtiaz
> > Snappy Internet & Telecom
> > 7266 SW 48 Street
> > Miami, FL 33155
> > Tel: 305 663 5518 x 232
> >
> > Help-desk: (305)663-5518 Option 2 or Email: Support () Snappytelecom net
> >
> >
> >
> >
> > <blockquote>
> > From: "Colton Conor" < colton.conor () gmail com >
> > To: "Mike Hammett" < nanog () ics-il net >
> > Cc: "Luke Guillory" < lguillory () reservetele com >, "nanog list" <
> > nanog () nanog org >, "Faisal Imtiaz" < faisal () snappytelecom net >
> > Sent: Monday, June 19, 2017 3:30:37 PM
> > Subject: Re: DWDM Mux/Demux using 40G Optics
> >
> >
> >
> >
> > <blockquote>
> >
> > I guess that is the real question. Besides the client ports that are
> > clearly identified by channel number on Muxes, what channels can the
> > special ports handle?
> >
> > http://www.fs.com/products/43723.html It has 4 special service port
> > options:
> >
> > 1. Expansion Port (Based on what I am seeing, I think this would be to
> > stack another mux if you needed more channels. So I assume it allows
> > all channels to be added besides the client channels?) </blockquote>
> >
> >
> >
> > Exactly... this is basically a pass thru port, i.e. what is not
> > getting mux/demux should get passed thru (keep the insertion loss in
> mind).
> > <blockquote>
> >
> >
> > 2. Monitor Port (I think this is just a tap that you would hook a
> > monitor up to, and be able to see all channels coming through with a
> > meter. I assume not a good idea to add/drop channels through this port)?
> > </blockquote>
> >
> >
> >
> > I don't use this port, but supposedly it will pass a fraction 5% of
> > the light from the main port so that it can be monitored. May be
> > someone else can offer some practical use for this port.
> > <blockquote>
> >
> >
> > 3. 1310nm Port (Labeled as 1310, but clearly allows more than just
> > 1310 since tutorial is saying it supports QSFP+ which is 1270 - 1330
> > nm, so what range does it really support or is there no a range?)
> > </blockquote>
> >
> > Not sure about the range question, but this is the port for having the
> > 40g/100g QSFP+ pass thru
> >
> >
> > <blockquote>
> >
> >
> > 4. 1550nm Port (Labeled as 1550nm, but I wonder if its like the
> > 1330nm?)
> >
> >
> > </blockquote>
> >
> > I have not had the need to explore this in detail, but from my initial
> > understanding, this can be used for ZR (long range optics) and or to
> > stack a DWDM Mux
> >
> >
> > <blockquote>
> >
> >
> > Would you recommend a monitor port on every mux you buy?
> >
> >
> > </blockquote>
> >
> > As I shared above, I don't.
> >
> >
> >
> >
> > <blockquote>
> >
> >
> >
> > On Mon, Jun 19, 2017 at 2:18 PM, Mike Hammett < nanog () ics-il net >
> wrote:
> > <blockquote>
> >
> >
> > Verify pass-through frequencies for the 1310 (or equivalent) for the
> > passive mux in question. This would only work for a single channel.
> >
> >
> >
> >
> > -----
> > Mike Hammett
> > Intelligent Computing Solutions
> > http://www.ics-il.com
> >
> > Midwest-IX
> > http://www.midwest-ix.com
> >
> >
> >
> > From: "Luke Guillory" < lguillory () reservetele com >
> > To: "Faisal Imtiaz" < faisal () snappytelecom net >, "Colton Conor" <
> > colton.conor () gmail com >
> > Cc: "nanog list" < nanog () nanog org >
> > Sent: Monday, June 19, 2017 2:13:10 PM
> > Subject: RE: DWDM Mux/Demux using 40G Optics
> >
> >
> >
> > Faisal,
> >
> > How would he inject his current 4x10 40g into the mux which is
> > currently on a single LC cable?
> >
> >
> >
> >
> >
> > Luke Guillory
> > Network Operations Manager
> >
> > Tel: 985.536.1212
> > Fax: 985.536.0300
> > Email: lguillory () reservetele com
> >
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> > 100 RTC Dr
> > Reserve, LA 70084
> >
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> > -----Original Message-----
> > From: NANOG [mailto: nanog-bounces () nanog org ] On Behalf Of Faisal
> > Imtiaz
> > Sent: Monday, June 19, 2017 2:02 PM
> > To: Colton Conor
> > Cc: nanog list
> > Subject: Re: DWDM Mux/Demux using 40G Optics
> >
> > Answers in-line below.
> >
> >
> >
> > If you look at the CWDM Muxes (8 or 9 channel) you will notice a
> > common configuration of
> >
> > Upgrade Port (expansion port) + 1450 or 1470 to 1610nm
> >
> > in the DWDM muxes you will see them listed as # of Port + 1310 pass
> > thru channel.
> >
> > These are exactly what you are looking for ..... :)
> >
> >
> >
> > </blockquote>
> >
> >
> > </blockquote>
> >
> > </blockquote>