[177884] in North American Network Operators' Group
Re: Low cost WDM gear
daemon@ATHENA.MIT.EDU (Faisal Imtiaz)
Sat Feb 7 15:30:59 2015
X-Original-To: nanog@nanog.org
Date: Sat, 7 Feb 2015 20:30:50 +0000 (GMT)
From: Faisal Imtiaz <faisal@snappytelecom.net>
To: Kenneth McRae <kenneth.mcrae@me.com>
In-Reply-To: <68212b43-4395-4567-929c-29cb6fad21d1@me.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
Kenneth,=20
I am sorry, but it sounds like you made a mistake in not calculating loss o=
f the devices in the path, and are blaming a Mfg for the mistake... They cl=
early 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@me.com>
> To: "Rodrigo 1telecom" <rodrigo@1telecom.com.br>
> Cc: "NANOG" <nanog@nanog.org>
> Sent: Saturday, February 7, 2015 2:04:10 PM
> Subject: Re: Low cost WDM gear
>=20
> Hi Enviado,
>=20
> I cannot recommend FiberStore as I had a bad experience with them. =C2=A0=
I needed
> to cover only 3km from A to B side. =C2=A0When using 10km optics, I saw a=
loss of
> over 5db =C2=A0with their passive mux inserted into the path which create=
d a
> total loss of over -20db which is outside of the tolerances for our
> equipment with 10km SFP+. =C2=A0Using another vendors low insertion loss =
mux
> corrected our issue. =C2=A0I am sure if you are using an 80km optic, you =
may be
> able to tolerate a higher insertion loss to cover < 60km. =C2=A0I also no=
tice
> that their CDWM optics averaged about 3db less in power output when compa=
red
> to other vendors.
>=20
> Thanks
>=20
> Kenneth
>=20
> On Feb 07, 2015, at 10:33 AM, Rodrigo 1telecom <rodrigo@1telecom.com.br>
> wrote:
>=20
> Hi kenneth... which the distance do you have from side A to side B when y=
ou
> using passive solutions from fiberstore( mux and demux)?
> I buy this mux and demux(4 channels single fiber) and only make a test ab=
out
> 60km( mux side A and demux on side B) with sfp+10gb for 80km... ( only se=
e
> 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 solu=
tion
> good?
> Thanks!!!
>=20
> Enviado via iPhone =EF=A3=BF
> Grupo Connectoway
>=20
> Em 07/02/2015, =C3=A0s 14:55, Kenneth McRae <kenneth.mcrae@me.com> escrev=
eu:
> 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 r=
un
> passive muxes for CWDM (8 - 16 channels).
> On Feb 07, 2015, at 09:51 AM, Manuel Mar=C3=ADn <mmg@transtelco.net> wrot=
e:
> Hi Mike
> I can recommend a couple of vendors that provide cost effective solutions=
.
> Ekinops & Packetlight.
> On Saturday, February 7, 2015, Mike Hammett <nanog@ics-il.net> wrote:
> I know there are various Asian vendors for low cost (less than $500) muxe=
s
> to throw 16 or however many colors onto a strand. However, they don't wor=
k
> 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 a=
nd
> 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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