DWDM Mux/Demux using 40G Optics

Faisal Imtiaz faisal at snappytelecom.net
Tue Jun 20 01:15:31 CST 2017


You can see the CWDM mux listed on their site, and they will also make custom mux for you. 

Let me know if you need a Sales Contact for them.. 

My last set of muxes from them were custom muxes and they were able to get me a configuration with a lower insertion loss than what is listed on their website. ( I paid a small premium for that feature, which I was very happy to). 

Regards. 

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 

> 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 7:14:53 PM
> Subject: Re: DWDM Mux/Demux using 40G Optics

> 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

>> Help-desk: (305)663-5518 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

>>>> Help-desk: (305)663-5518 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
>>>>>> Fax: 985.536.0300
>>>>>> 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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