PASSIVE [D]WDM... Like, Cisco 15216.

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1

We're looking to get glass between three buildings, and looking closely at
the 15216 (passive WDM, ie, a prism).

A couple of rambling questions, that perhaps folks here have experience
with.

First, has anyone had experience with ITU Grid Optic GBICs? Do they even
exist?

Second, does anyone know of a 'back-box' that will take standard 1310 or
1550 nm signal, and 'convert' it to an ITU grid?

Any pointers, help, or a kick in arse would be appreciated.

-- Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben --
-- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --

2

First, has anyone had experience with ITU Grid Optic GBICs? Do they even
exist?

Cisco sell "CWDM" GBICs, which are sort of on ITU wavelengths, but with a
wider spacing. I've not tried them to see if I can use them with the 15216
but "sparsely".

Second, does anyone know of a 'back-box' that will take standard 1310 or
1550 nm signal, and 'convert' it to an ITU grid?

I'm currently using the 15454 to wavelength convert OC48 signals, but have
not to date seen a black-box wavelength convertor - I would also be interested
to know if such a beast exists. I think if you want to do this, you're stuck
with the Metro 1500 (or equivalent from someone else), which becomes very
expensive quickly.

Simon

3

Transmode <http://www.transmode.com> has both 1.25Ghz and 2.5Ghz units
with where you pretty much can pick and choose your optics from 850nm MM,
1310, 1510, 1530, 1550 and 1570nm when you order. This is not a complete
ITU grid from what I can find (I don't know exactly what ITU grid is but I
found some specs) but rather for CWDM use.

There should be quite a few manufacturers making units like these, I know
the MRV people does it as well (or some company within MRV).

4

Mikael Abrahamsson <swmike@swm.pp.se> writes:

There should be quite a few manufacturers making units like these, I know
the MRV people does it as well (or some company within MRV).

here's another:

http://www.opticalaccess.com/products-ld.shtml

Disclaimer: I'm not affiliated with the company, I'm not even a
satisfied customer, I'm just some guy who typed "optical transponder
DWDM" into Google and shoveled through what came out.

                                        ---rob