[177902] in North American Network Operators' Group
Re: Low cost WDM gear
daemon@ATHENA.MIT.EDU (Colin Johnston)
Sat Feb 7 18:31:04 2015
X-Original-To: nanog@nanog.org
From: Colin Johnston <colinj@gt86car.org.uk>
In-Reply-To: <CAE_ug15-gK+ao+gpe2-SmG1rYy_Gjj26h+h63fW7B=bW4+0GDQ@mail.gmail.com>
Date: Sat, 7 Feb 2015 23:28:54 +0000
To: Tim Durack <tdurack@gmail.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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@gmail.com> wrote:
>=20
> 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.
>=20
> On Sat, Feb 7, 2015 at 1:04 PM, Mike Hammett <nanog@ics-il.net> wrote:
>=20
>> One particular route I'm looking at is 185 miles, so of the options
>> presented 300 km is closest. ;-)
>>=20
>>=20
>>=20
>>=20
>> -----
>> Mike Hammett
>> Intelligent Computing Solutions
>> http://www.ics-il.com
>>=20
>> ----- Original Message -----
>>=20
>> From: "Christopher Morrow" <morrowc.lists@gmail.com>
>> To: "Kenneth McRae" <kenneth.mcrae@me.com>
>> Cc: "NANOG" <nanog@nanog.org>
>> Sent: Saturday, February 7, 2015 12:02:11 PM
>> Subject: Re: Low cost WDM gear
>>=20
>> would be good for mike to define 'long distances' here, is it:
>> 2km
>> 30km
>> 300km
>> 3000km
>>=20
>> Probably the 30-60k range is what you mean by 'long distances' but...
>> clarity might help.
>>=20
>> On Sat, Feb 7, 2015 at 12:55 PM, Kenneth McRae <kenneth.mcrae@me.com>
>> wrote:
>>> Mike,
>>>=20
>>> 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).
>>>=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
>> solutions.
>>> 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)
>> 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
>>>=20
>>>=20
>>> --
>>> TRANSTELCO| Manuel Marin | VP Engineering | US: *+1 915-217-2232* | =
MX:
>> *+52
>>> 656-257-1109*
>>>=20
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>>=20
>>=20
>=20
>=20
> --=20
> Tim:>
