DWDM Mux/Demux using 40G Optics

Colton Conor colton.conor at gmail.com
Mon Jun 19 23:14:53 CST 2017


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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