I have a 15' optical handoff run from our ISP Flashwave to a 3845. We need an SFP capable of handling 1310nm single-mode transmission, but the GLC-EX-SMD has far more power than we'd need. I'm thinking a lower-powered SFP that still meets the transmission criteria would be less expensive and wouldn't require a 5dB attenuator.
I can't find another suitable option, can anyone suggest something different? And if not, perhaps a link to optical attenuators that would work well with the GLC-EX-SMD?
It would be best to match the reach type (1000Base-??) of the optical interface of the connecting Flashwave interface card. I would check with the ISP to see if they can install a data card that accepts a short haul (SX) transceiver.
A shorter reach 1310nm SFP compatible with the 3845 would be the 1000BASE-LX/LH, part number options include GLC-LH-SM & GLC-LH-SMD.
Adding to Tom's recommendations, I always prefer to use the SMD models when dealing with 3rd party handoffs since they allow me to check the send and receive optical power levels remotely. They cost a bit more but if they save a couple trips to the data center, they more than pay for the delta.
Thank you Tom and Marvin. I've actually looked into the GLC-LH-SM/D, but the specs state that they're 1300nm SFPs... my lack of optical experience puts me at a disadvantage in that I don't know if this will work with the ISP's 1310nm handoff.
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