Certain OEM – manufacturer use 62.5 µm transceivers for their products as mixing consoles or stage boxes. It is essential to consider an efficient and straight wiring setup to avoid additional insertion loss due to mixed up fiber cables with 62.5 µm and 50 µm.
Resulting on field tests the most efficient setup is to connect 50 µm cables direct with the 62.5 µm source (e.g. mixing console). Therefore the connection adds additional insertion loss of approx. 2dB to the entire setup.