Optical Doctor and Fiber Doctor

Dear friend!
1. For both OD and FD, they have hardware limitations:
FD: Dependencies and Limitations, Availability.

OD: Dependencies and Limitations, Availability.

2. probing signal

FD: During the fiber test, the OSC board or OA board sends independent optical signals to test the fiber. More details: Networking Scenarios (For OSN 9800/8800/6800/3800)

 OD: During the detection, the OD software integrated in the NMS only needs to collect the performance data of optical signals on the MCA/LS-OA/OTU board to maintain and manage optical links. More details: Principles

3. The OTDR on the OSC is the core component of the FD. The OTDR is not directly related to the OD. On the NMS, the OTDR is directly started only after the fiber test function is enabled. More details: Starting Fiber Detection

Thank you!