Wavelengt window Laser X2-10GB-LR

Unanswered Question
Jul 21st, 2008

Cisco spec's on internet give 1260 to 1355 nm. We use systems on 1550 nm together with this laser. Do somebody have the correct spec's?



I have this problem too.
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Tom Randstrom Mon, 07/21/2008 - 07:34

The X2-10GB-LR has a nominal wavelength of 1310nm. The X2-10GB-ER has a nominal wavelength of 1550nm.

Are you deploying DWDM (multiple 1500nm wavelengths over a fiber) or WDM using 1310nm & 1550nm on a single fiber?

bakkerlsdn Mon, 07/21/2008 - 07:43

I have seen the specs of both lasers on the internet but the LR is ordered.

We are using 1550 nm to transmit an we have a broadband receiver from 1200 to 1580 nm.

Normaly the (for us) customer laser have the same wideband receiver so it will work.

With the Cisco it works on several links we have made but the specs are saying it will not. This is the problem.

Is the receiver wideband but does Cisco not garantee it or is it a narrow band receiver?


Tom Randstrom Mon, 07/21/2008 - 11:32

Most receivers are wideband (handling both wavelength windows). However, most companies only qualify performance for the transmit wavelength, as it reduces testing time and test case volume.

You would have to get with the appropriate Cisco product manager (?) to confirm support.

viyuan700 Sat, 07/26/2008 - 20:15


if u r talking about this document, then Transmit and Receive Wavelength 1260- to 1355 correspond to transmitter wavelength not for receiver as per my knowledge.

If you already have these module and receiver not working did u check the receiver with 1310 source or the cable connecting the link?


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