3Com S7906E Getting Started Manual page 11

Figure 1-5 Front panel of the S7903E
(5)
(4)
(3)
(1) Fan tray
(3) Power modules
(5) SRPUs (in slot 0 and slot 1)
All the modules of the S7903E are hot swappable.
The S7903E has five horizontal slots. SRPUs are inserted into the upper two slots (see callout (5)
in Figure 1-5). SRPUs are required and support active-standby switchover. Different LPUs are
inserted into the other three slots (see callout (4) in
The fan tray is installed on the right side of the chassis (see callout (1) in
The two power modules, which sit in the lower part of the chassis (see callout (3) in
provide 1+1 redundancy backup. You can select either AC power supply or DC power supply.
S7906E
Figure 1-6 shows the front panel of the S7906E.
(2) Jack for ESD-preventive wrist strap
(4) LPUs (in slot 2 to slot 4)
Figure 1-5).
1-5
(1)
(2)
(3)
Figure 1-5).
Figure 1-5),