B&B Electronics 850-14400--15 - Manual - Manual (Page 12)

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device, while local loopback tests can isolate problems on the fiber connected to the
module.
The following illustrations show a typical progression of loopback tests (i.e., starting by
checking the coax segment at the local side, then the fiber segment at the remote
side, etc).
NOTE
Physical fiber loopback capability is only available when performing the loopback at the Host.
The Remote unit will not loop the customer data back unless the Remote management DIP
Switch #10 is set to OFF.