Tuesday, May 15, 2018

40G multimode module with LC-connectors - impossible match?

Most 40G multimode modules out there uses MTP/MPO as physical connector for obvious reasons (because a 40G SR4 signal is actual a 4x10G signal and multimode cables are usually a bad choice if you want to wavelength multiplex stuff).

This gives that if you need to go to a different rack in the DC and there are only LC patchpanels available you will need to use a MTP/MPO to LC patchcable which will "eat" 4 pairs of LC at this patchpanel.

Looking at fs.com (and other vendors for that matter) do there exist some 40Gbase-SR4 optics that can use a single multimode cable (pair) with LC-connectors?

Or well it doesnt have to be SR4 on the fiber end of the module just that it will identify as such to the device the QSFP+ is fitted into and the cable (patchpanel) I have available is a multimode LC.

If I had the choice to use singlemode cables then this wouldnt have been an issue obviously...

Or am I missing something here?



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