[180589] in North American Network Operators' Group
Re: Tunable SFP
daemon@ATHENA.MIT.EDU (Eric Litvin)
Sun Jun 7 18:21:52 2015
X-Original-To: nanog@nanog.org
From: Eric Litvin <eric@lumaoptics.net>
In-Reply-To: <004101d0a167$11f1d830$35d58890$@wicks.co.nz>
Date: Sun, 7 Jun 2015 15:21:47 -0700
To: Tony Wicks <tony@wicks.co.nz>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
Dwdm tunable 10G can run at 1G with rate select.=20
Sent from my iPhone
> On Jun 7, 2015, at 2:15 PM, Tony Wicks <tony@wicks.co.nz> wrote:
>=20
> I don't quite see why you would want to use a tuneable 1G optic now days. G=
enerally people use coloured optics to either increase the capacity they can=
push down a Dark Fibre or to interconnect with a DWDM OTN. In days past usi=
ng different wavelengths for traffic separation would be not unheard of but i=
n today's world there are many better ways of doing that. The use of tuneabl=
e optics reduces sparing and complexity but it is a very difficult and expen=
sive manufacturing task and I can understand why no manufacturer would bothe=
r with 1G as that seems like a very small market. If you really want 1G ther=
e are plenty of CWDM fixed optics available. If you need more capacity, well=
really 10G is not at all expensive now days. If you want traffic separation=
then use MPLS. If you have old 1G only switches, well, you know the answer t=
o that.
>=20
> My 2c
>=20
>=20
> -----Original Message-----
> Hi,
>=20
> I believe nobody actually answered the original question: is there any tun=
able SFP module available. Notice the lack of a + in that statement. The dat=
asheets for modules cited in this thread are all 10G modules with minimum sp=
eed of 8.5G. Nothing that will work at 1G.
>=20
