DWDM Mux/Demux using 40G Optics

Colton Conor colton.conor at gmail.com
Mon Jun 19 20:32:28 CST 2017


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 at 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 at gmail.com>
> To: "Faisal Imtiaz" <faisal at snappytelecom.net>
> Cc: "Mike Hammett" <nanog at ics-il.net>, "Luke Guillory" <
> lguillory at reservetele.com>, "nanog list" <nanog at 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 at 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 at Snappytelecom.net
>
>
>
>
> <blockquote>
> From: "Colton Conor" < colton.conor at gmail.com >
> To: "Mike Hammett" < nanog at ics-il.net >
> Cc: "Luke Guillory" < lguillory at reservetele.com >, "nanog list" <
> nanog at nanog.org >, "Faisal Imtiaz" < faisal at 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 at 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 at reservetele.com >
> To: "Faisal Imtiaz" < faisal at snappytelecom.net >, "Colton Conor" <
> colton.conor at gmail.com >
> Cc: "nanog list" < nanog at 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 at reservetele.com
>
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> 100 RTC Dr
> Reserve, LA 70084
>
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> -----Original Message-----
> From: NANOG [mailto: nanog-bounces at 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>
>
>
>


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