[177888] in North American Network Operators' Group
Re: Low cost WDM gear
daemon@ATHENA.MIT.EDU (Mike Hammett)
Sat Feb 7 15:50:23 2015
X-Original-To: nanog@nanog.org
Date: Sat, 7 Feb 2015 14:48:37 -0600 (CST)
From: Mike Hammett <nanog@ics-il.net>
To: NANOG <nanog@nanog.org>
In-Reply-To: <1283742745.1043960.1423341859204.JavaMail.zimbra@snappytelecom.net>
Errors-To: nanog-bounces@nanog.org
I'm surprised how many people (operators and vendors) in the fixed wireless=
space don't get down to the specs (or provide the proper info) to just fig=
ure out how it'll work before hanging the gear.=20
I shouldn't be surprised, though. People are lazy (myself included).=20
-----=20
Mike Hammett=20
Intelligent Computing Solutions=20
http://www.ics-il.com=20
----- Original Message -----
From: "Faisal Imtiaz" <faisal@snappytelecom.net>=20
To: "Rodrigo 1telecom" <rodrigo@1telecom.com.br>=20
Cc: "NANOG" <nanog@nanog.org>=20
Sent: Saturday, February 7, 2015 2:44:19 PM=20
Subject: Re: Low cost WDM gear=20
If you pay close attention to the Spec Sheets, on power output, insertion l=
oss, sensitivity, and do the proper calculation for your link, then using a=
nyone's products, passive or active will work unless the devices do not mee=
t specified specs.=20
If you don't do your homework, cals on the design, loss, and just buy stuff=
based on whatever, then it does not matter who the mfg. is, you are very v=
ery likely to be surprised in a bad way.=20
:)=20
Faisal Imtiaz=20
Snappy Internet & Telecom=20
----- Original Message -----=20
> From: "Rodrigo 1telecom" <rodrigo@1telecom.com.br>=20
> To: "Kenneth McRae" <kenneth.mcrae@me.com>=20
> Cc: "NANOG" <nanog@nanog.org>=20
> Sent: Saturday, February 7, 2015 3:24:43 PM=20
> Subject: Re: Low cost WDM gear=20
>=20
> What others vendors do you using? Here in Brazil only PADTEC have this=20
> passive solution... Some days ago Digitel contact me to show your multipl=
ex=20
> solution... Is a active solution...=20
> We import this from fiberstore, but i don't know others vendors to buy 10=
G=20
> sfp+ cwdm and this mux/demux...=20
>=20
> Enviado via iPhone =EF=A3=BF=20
> Grupo Connectoway=20
>=20
> > Em 07/02/2015, =C3=A0s 16:04, Kenneth McRae <kenneth.mcrae@me.com> escr=
eveu:=20
> >=20
> > Hi Enviado,=20
> >=20
> > I cannot recommend FiberStore as I had a bad experience with them. I=20
> > needed to cover only 3km from A to B side. When using 10km optics, I sa=
w=20
> > a loss of over 5db with their passive mux inserted into the path which=
=20
> > created a total loss of over -20db which is outside of the tolerances f=
or=20
> > our equipment with 10km SFP+. Using another vendors low insertion loss=
=20
> > mux corrected our issue. I am sure if you are using an 80km optic, you=
=20
> > may be able to tolerate a higher insertion loss to cover < 60km. I also=
=20
> > notice that their CDWM optics averaged about 3db less in power output w=
hen=20
> > compared to other vendors.=20
> >=20
> > Thanks=20
> >=20
> > Kenneth=20
> >=20
> >> On Feb 07, 2015, at 10:33 AM, Rodrigo 1telecom <rodrigo@1telecom.com.b=
r>=20
> >> wrote:=20
> >>=20
> >=20
> >> Hi kenneth... which the distance do you have from side A to side B whe=
n=20
> >> you using passive solutions from fiberstore( mux and demux)?=20
> >> I buy this mux and demux(4 channels single fiber) and only make a test=
=20
> >> about 60km( mux side A and demux on side B) with sfp+10gb for 80km... =
(=20
> >> only see ddm on my ex3300( about -19db for 60km). Test switch access w=
ith=20
> >> ssh and pinging tests...=20
> >> What kind os issue do you have? For distances less than 60km is this=
=20
> >> solution good?=20
> >> Thanks!!!=20
> >>=20
> >> Enviado via iPhone =EF=A3=BF=20
> >> Grupo Connectoway=20
> >>=20
> >>> Em 07/02/2015, =C3=A0s 14:55, Kenneth McRae <kenneth.mcrae@me.com> es=
creveu:=20
> >>> Mike,=20
> >>> I just replaced a bunch of FiberStore WDM passive muxes with OSI Hard=
ware=20
> >>> equipment. The FiberStore gear was a huge disappointment (excessive=
=20
> >>> loss, poor technical support, refusal to issue refund without=20
> >>> threatening legal action, etc.). I have had good results from the OSI=
=20
> >>> equipment so far. I run passive muxes for CWDM (8 - 16 channels).=20
> >>> On Feb 07, 2015, at 09:51 AM, Manuel Mar=C3=ADn <mmg@transtelco.net> =
wrote:=20
> >>> Hi Mike=20
> >>> I can recommend a couple of vendors that provide cost effective=20
> >>> solutions.=20
> >>> Ekinops & Packetlight.=20
> >>> On Saturday, February 7, 2015, Mike Hammett <nanog@ics-il.net> wrote:=
=20
> >>> I know there are various Asian vendors for low cost (less than $500)=
=20
> >>> muxes=20
> >>> to throw 16 or however many colors onto a strand. However, they don't=
=20
> >>> work=20
> >>> so well when you don't control the optics used on both sides (therefo=
re=20
> >>> must use standard wavelengths), obviously only do a handful of channe=
ls=20
> >>> and=20
> >>> have a distance limitation.=20
> >>> What solutions are out there that don't cost an arm and a leg?=20
> >>> -----=20
> >>> Mike Hammett=20
> >>> Intelligent Computing Solutions=20
> >>> http://www.ics-il.com=20
> >>> --=20
> >>> TRANSTELCO| Manuel Marin | VP Engineering | US: *+1 915-217-2232* | M=
X:=20
> >>> *+52=20
> >>> 656-257-1109*=20
> >>> CONFIDENTIALITY NOTICE: This communication is intended only for the u=
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>=20
