Tapping multi mode fires is a little tricky, because the optical budget on multi mode links small compare to single mode. That is the reason that a multi mode tap should have a splitting ratio of 50/50. This works in most cases. But sometimes it is needed to tap a multi mode link a second time.
This is not possible the remaining optical power is too small to establish a failure free link. The only option to do such an application is amplification. The eases way to do so, is to you the Cubro Media converter as Amplifier. This works in 1 and in 10 Gbit networks.