By using a Fibre Optic Loopback Fibre Optic LoopBack
Fibre Optic Loopback modules are also called optical loopback adapters. I use the best practice of sending a loopback test to equipment, one at a time for isolating the problem
I have used different types:
LC loopback modules
SC loopback modules
MT-RJ fibre optic loopback
Others
It helps in testing the transmission capability and the receiver sensitivity of network equipment.
To use I connect One connector into the output port, while the other is plugged into the input port of the equipment.
