Low cost WDM gear

Kenneth McRae kenneth.mcrae at me.com
Sat Feb 7 20:46:20 UTC 2015


Faisal, I worked directly with FiberStore's engineers to determine the optics and mux needed for my use case.  They recommended the mux and the optics for the 3km distance.   You can always buy stronger optics, but that is not point I am making.   I provided the scale and scope of the project and they provided the BOM to deliver the required service.  When the equipment failed, FiberStore refused to honor their return policy and issue an RMA until we threatened legal action. 

Same sales scenario with OSI Hardware..  They provide the BOM with passive muxes and 10km optics and it works with no problem.

In this scenario, I can definitely blame the manufacturer.  No to mention the terrible technical support that they offer.


On Feb 07, 2015, at 12:30 PM, Faisal Imtiaz <faisal at snappytelecom.net> wrote:

Kenneth, 

I am sorry, but it sounds like you made a mistake in not calculating loss of the devices in the path, and are blaming a Mfg for the mistake... They clearly list the insertion loss for the different muxes in the specs on their website.


Faisal Imtiaz
Snappy Internet & Telecom

----- Original Message -----
From: "Kenneth McRae" <kenneth.mcrae at me.com>
To: "Rodrigo 1telecom" <rodrigo at 1telecom.com.br>
Cc: "NANOG" <nanog at nanog.org>
Sent: Saturday, February 7, 2015 2:04:10 PM
Subject: Re: Low cost WDM gear
Hi Enviado,
I cannot recommend FiberStore as I had a bad experience with them.  I needed
to cover only 3km from A to B side.  When using 10km optics, I saw a loss of
over 5db  with their passive mux inserted into the path which created a
total loss of over -20db which is outside of the tolerances for our
equipment with 10km SFP+.  Using another vendors low insertion loss mux
corrected our issue.  I am sure if you are using an 80km optic, you may be
able to tolerate a higher insertion loss to cover < 60km.  I also notice
that their CDWM optics averaged about 3db less in power output when compared
to other vendors.
Thanks
Kenneth
On Feb 07, 2015, at 10:33 AM, Rodrigo 1telecom <rodrigo at 1telecom.com.br>
wrote:
Hi kenneth... which the distance do you have from side A to side B when you
using passive solutions from fiberstore( mux and demux)?
I buy this mux and demux(4 channels single fiber) and only make a test about
60km( mux side A and demux on side B) with sfp+10gb for 80km... ( only see
ddm on my ex3300( about -19db for 60km). Test switch access with ssh and
pinging tests...
What kind os issue do you have? For distances less than 60km is this solution
good?
Thanks!!!
Enviado via iPhone 
Grupo Connectoway
Em 07/02/2015, às 14:55, Kenneth McRae <kenneth.mcrae at me.com> escreveu:
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
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