What optical wavelength is used by Cisco modules (850 vs. 1300)?

I am trying to verify what wavelength our Cisco cards operate at. The cards in question are WS-X4148-FX-MT cards that we have in our Catalyst 4006 switch.  I imagine they operate at a wavelength of 1300 nm (vice 850) but I need to verify so I can detemine if we have the correct media converters.  I looked up the specs for the card on the Cisco web site but no mention is made of the wavelength.

Thanks for any information you can provide.

Frank Nye
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your card is using 100base-fx standard so it uses 1300 nm wavelength

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