DWDM Mux/Demux using 40G Optics
Colton Conor
colton.conor at gmail.com
Wed Jul 26 02:28:34 UTC 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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