what is a optical transponder
Here, Optical Transponders (OTs) are Optical-Electrical-to-Optical (O-E-O) converters that input optical digital signals from routers, switches, or other transmission equipment using a receive de-vice, such as a photodiode, on the add/drop side of the OT.1  CR4 - Thread: Optical transponder and receiver.ere, Optical Transponders (OTs) are Optical-Electrical-to-Optical (O-E-O) converters that input optical digital signals from routers, switches, or other transmission equipment using a receive de-vice, such as a photodiode, on the add/drop side of the OT.