3Com 3C63400-3AC-C - PathBuilder S700 Switch Reference Manual page 59

Once you have connected the HSIM module, verify the front panel indicators. As
shown in Figure 19, the HSIM module has two front panel indicators in addition to
the common system LEDs:
Inservice—Indicates that the HSIM card is active.
Not Used—Indicates that the HSIM card is not in use.
Figure 20 HSIM LEDs
Slot 1
Step 4: Connect I/O Cabling and Wiring
Slot 18
Not
Used
45
Power On
Inservice
Fail
Test
Inservice
Enable
RX CLK
RX DATA
TX CLK
TX DATA