DWDM Mux/Demux using 40G Optics

Jeroen Wunnink Jeroen.Wunnink at gtt.net
Tue Jun 20 08:55:06 CST 2017


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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