When inserting or removing repeater modules (using, Flip open (toward you) the two plastic doors on, Align the guide rails on either side of the mod – Allied Telesis AT-TS24TR User Manual
Page 31: If you use a chassis with a segmented backplane, h, Plug in the module’s power cord, Check to see that the power indicator illuminat, Seat the module carefully and firmly in the bac, Check to see that the master indicator turns of

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