The loopback cables can be used as test equipment for testing fiber optic lines and thus represent a cost-effective tool for measurements in new or existing fiber optic networks. Due to the attached duplex connector, a direct connection can be established quickly, for example at a patch panel, in order to test the entire route on both fibers simultaneously.
It can also be used to test the functionality of transceivers. However, care must be taken that no overdriving takes place here, as this can lead to the destruction of the SFP.
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