DWDM Mux/Demux using 40G Optics

Colton Conor colton.conor at gmail.com
Wed Jul 26 02:28:34 CST 2017


Besides FS.com and http://www.beetlefiberoptics.com, do you have any more
recommendations for passive muxes? I usually stick to and like FiberStore,
but I am wondering if there is anything out there better/cheaper.

One of the things I am noticing is the CWDM and DWDM SFP+ optics are quite
expensive at  $250 for CWDM and $350 for DWDM. I guess it shouldn't be
cheap to send 10G around a ring, but I am wondering what transponders cost.

On Tue, Jun 20, 2017 at 3:55 AM, Jeroen Wunnink <Jeroen.Wunnink at gtt.net>
wrote:

> Another alternative is to ask the http://www.beetlefiberoptics.com guys.
> They build muxes on spec and they can also provide a 1310nm wide-band port
> on their units which allows a 40/100G-LR4 aside from the 1550nm DWDM band.
>
> We’ve used some simple splitters (line/1310nm LR4/1550nm DWDM ports on a
> unit) and full passive DWDM muxes with a 40/100G-LR4 port on there and
> these work pretty good.
>
>
>
>
> Jeroen Wunnink
> IP Engineering manager
> office: +31.208.200.622 ext. 1011
> Amsterdam Office
> www.gtt.net <http://www.gtt.net/>
>
>
>
>
> On 20/06/2017, 01:14, "NANOG on behalf of Colton Conor" <
> nanog-bounces at nanog.org on behalf of colton.conor at gmail.com> wrote:
>
>     Do you have any idea if fiberstore has one with both a monitor and 1310
>     wideband port? I would want both.
>
>     Seeing as how they don't charge extra for an expansion port, but do for
>     other special ports I am thinking of just using the expansion port.
>
>     On Mon, Jun 19, 2017 at 4:52 PM, Faisal Imtiaz <
> faisal at snappytelecom.net>
>     wrote:
>
>     >
>     > >>From the sounds of it, no one knows the real difference between the
>     > expansion port, 1310 port, and 1550 port
>     >
>     > Hmm.. not sure how you are reading this...
>     > I believe that there is no 'standard' and as such the actual filter
> on the
>     > mux/demux you are using may vary by mfg.
>     > I can confirm what is an expansion port... (pass everything thru
> that is
>     > not being filtered by the mux/demux )
>     > I can also confirm that Fiberstore 1310nm port (not to be confused
> with
>     > the CWDM 1310 port) will pass all 4 wavelengths for 40g/100g optics.
>     > I don't have experience with the 1550nm 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.
>     >
>     > Correct that is what it is designed for..... it allows a fraction of
>     >  light (I am guessing would also cause an increase in insertion loss
>     > figure).
>     >
>     > >> Not sure if their would be a monitor port for both directions is
> you
>     > were using a OADM?
>     > If you look at the OADM's e.g. like a Cisco CWDM OADM with monitor
> ports,
>     > you will see that they are on both sides east & west.
>     >
>     >
>     > Regards.
>     >
>     >
>     > Faisal Imtiaz
>     > Snappy Internet & Telecom
>     > 7266 SW 48 Street
>     > Miami, FL 33155
>     > Tel: 305 663 5518 x 232 <(305)%20663-5518>
>     >
>     > Help-desk: (305)663-5518 <(305)%20663-5518> Option 2 or Email:
>     > Support at Snappytelecom.net
>     >
>     > ------------------------------
>     >
>     > *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 4:14:19 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 <(305)%20663-5518>
>     >>
>     >> Help-desk: (305)663-5518 <(305)%20663-5518> Option 2 or Email:
>     >> Support at Snappytelecom.net
>     >> ------------------------------
>     >>
>     >> *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
>     >>
>     >> 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?)
>     >>
>     >>
>     >> 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).
>     >>
>     >> 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)?
>     >>
>     >> 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.
>     >>
>     >> 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?)
>     >>
>     >> Not sure about the range question, but this is the port for having
> the
>     >> 40g/100g QSFP+ pass thru
>     >>
>     >> 4. 1550nm Port (Labeled as 1550nm, but I wonder if its like the
> 1330nm?)
>     >>
>     >> 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
>     >>
>     >> Would you recommend a monitor port on every mux you buy?
>     >>
>     >> As I shared above, I don't.
>     >>
>     >>
>     >> On Mon, Jun 19, 2017 at 2:18 PM, Mike Hammett <nanog at ics-il.net>
> wrote:
>     >>
>     >>> 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 <(985)%20536-1212>
>     >>> Fax:    985.536.0300 <(985)%20536-0300>
>     >>> Email:  lguillory at reservetele.com
>     >>>
>     >>> Reserve Telecommunications
>     >>> 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 ..... :)
>     >>>
>     >>>
>     >>>
>     >>
>     >
>
>
>


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