Low cost WDM gear

Colin Johnston colinj at gt86car.org.uk
Sat Feb 7 23:28:54 UTC 2015


Yes can do long distances without need to amplifier site (train tracks for example) but you need to make sure ground is stable and if using track bed of train track that the ballast is good and stable else ground tremors affect the signal quality.

Colin



> On 7 Feb 2015, at 22:32, Tim Durack <tdurack at gmail.com> wrote:
> 
> You can do ~500km without inline amplifier sites using EDFA+Raman+ROPA, but
> you are going to need some serious optical engineering to make that work.
> The more standard way to do it is amplifier sites every 80-100km for EDFA.
> If you are doing 10GigE you will need to allow for DCM also.
> 
> On Sat, Feb 7, 2015 at 1:04 PM, Mike Hammett <nanog at ics-il.net> wrote:
> 
>> One particular route I'm looking at is 185 miles, so of the options
>> presented 300 km is closest. ;-)
>> 
>> 
>> 
>> 
>> -----
>> Mike Hammett
>> Intelligent Computing Solutions
>> http://www.ics-il.com
>> 
>> ----- Original Message -----
>> 
>> From: "Christopher Morrow" <morrowc.lists at gmail.com>
>> To: "Kenneth McRae" <kenneth.mcrae at me.com>
>> Cc: "NANOG" <nanog at nanog.org>
>> Sent: Saturday, February 7, 2015 12:02:11 PM
>> Subject: Re: Low cost WDM gear
>> 
>> would be good for mike to define 'long distances' here, is it:
>> 2km
>> 30km
>> 300km
>> 3000km
>> 
>> Probably the 30-60k range is what you mean by 'long distances' but...
>> clarity might help.
>> 
>> On Sat, Feb 7, 2015 at 12:55 PM, Kenneth McRae <kenneth.mcrae at me.com>
>> wrote:
>>> Mike,
>>> 
>>> I just replaced a bunch of FiberStore WDM passive muxes with OSI Hardware
>>> equipment. The FiberStore gear was a huge disappointment (excessive loss,
>>> poor technical support, refusal to issue refund without threatening legal
>>> action, etc.). I have had good results from the OSI equipment so far. I
>>> run passive muxes for CWDM (8 - 16 channels).
>>> 
>>> On Feb 07, 2015, at 09:51 AM, Manuel Marín <mmg at transtelco.net> wrote:
>>> 
>>> Hi Mike
>>> 
>>> I can recommend a couple of vendors that provide cost effective
>> solutions.
>>> Ekinops & Packetlight.
>>> 
>>> On Saturday, February 7, 2015, Mike Hammett <nanog at ics-il.net> wrote:
>>> 
>>> I know there are various Asian vendors for low cost (less than $500)
>> muxes
>>> to throw 16 or however many colors onto a strand. However, they don't
>> work
>>> so well when you don't control the optics used on both sides (therefore
>>> must use standard wavelengths), obviously only do a handful of channels
>> and
>>> have a distance limitation.
>>> What solutions are out there that don't cost an arm and a leg?
>>> -----
>>> Mike Hammett
>>> Intelligent Computing Solutions
>>> http://www.ics-il.com
>>> 
>>> 
>>> --
>>> TRANSTELCO| Manuel Marin | VP Engineering | US: *+1 915-217-2232* | MX:
>> *+52
>>> 656-257-1109*
>>> 
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> 
> 
> -- 
> Tim:>




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