[134069] in North American Network Operators' Group
inquiry on using POS
daemon@ATHENA.MIT.EDU (Jinwha Chung)
Wed Dec 22 21:46:06 2010
From: "Jinwha Chung" <chungjinwha@gmail.com>
To: <nanog@nanog.org>
Date: Thu, 23 Dec 2010 11:45:54 +0900
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi, there;
First of all, thanks you all for your unintended and unnoticed help what
I=A1=AFve got from nanog.
=20
I=A1=AFm looking for a reference case of a point-to-point POS link.
My potential customer asked me to configure their nodes using 40G POS
interface cards.
The distance of their nodes is between 10 km to 50 km.
They are considering Cisco CRS for their core router.
I=A1=AFve found that CRS has 2 kinds of POS card. One support only up =
to 2km.
so, this one is out.
>From the datasheet, the other one can support point-to-point connection =
up
to 80km using this DCU. Dispersion compensating unit.
I=A1=AFve talked about this configuration with people and no one would
recommend those kind of things.
Personally, I prefer 10G Ethernet with XENPAK ZR optics.
=20
Here is what I want to know.
Is there anyone who are using POS with DCUs (without DWDM or something =
like
that) between nodes of less than 80km apart?
If there, would you recommend it to others?
=20
Jinwha Chung
CCIE#11776
u-Eng'g Team | u-Telecom Global Business Unit | SK Engineering &
Construction Co. Ltd
South Korea
TEL 82-2-3700-8822
FAX 82-2-3700-8999
