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SFP-10G-LRM interoperability with SFP-10G-LR

I previously included this in a more complicated query (“Interoperable ASR1000 XFP for SFP-10G-LRM ?”) that didn’t generate any responses, so here is the revised question:

Will a SFP-10G-LRM interoperate with a SFP-10G-LR if I connect using single mode fiber?

(Fiber length would not exceed 100 meters.)

Power and wavelength specifications for the two SFP+ modules seem to indicate that they would work together:

http://www.cisco.com/en/US/prod/collateral/modules/ps5455/data_sheet_c78-455693.html

I’m just concerned that there could be some protocol differences. Otherwise I’m not sure why there would be two different standards, i.e –LR and –LRM.

I checked the "definitive source for everything" and that didn’t clarify LR/LRM interoperability either:

http://en.wikipedia.org/wiki/10-gigabit_Ethernet

Thanks.

Phil

  • Optical Networking
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SFP-10G-LRM interoperability with SFP-10G-LR

AFAIK they should interoperate over SM fiber distances in the range you noted. Protocol-wise the encoding is definitely interoperable. The concern is generally receiving light at optical power levels the receiver can translate into electrical signals faithfully (and of course transmitting at levels adequate for the distant end to do the same).

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