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hello
I have two differential relays with order Code:
7SD5221-4AB29-0CK0 M0B
Its output is multimode 820nm up to 3.5km
Unfortunately, the path between my two relays is single-mode fiber.
put a switch on the way that has two fiber optic ports. One of sfp port cisco glc-lh-sm and which my link between 2 substation up but the other port i put other port glc-sx-mm For connection between relay and switch but this port down.
my question is . What is the solution for the connection between the relays that has a multimode output and the connection between our two substation is single mode?
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