Allied Telesis 8100S Series - Manual (Page 82)

Chapter 4: Cabling the Networking Ports
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Figure 31. Removing the Dust Cover from the SFP Module
6. Verify that the handle on the SFP transceiver is in the upright position,
as shown in Figure 32.
Figure 32. Positioning the SFP Handle in the Upright Position
SFP Handle