3Com 3CR17450-91, Руководство по началу работы

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Physical Features 15
Rear Panel The rear panel includes a standard AC power socket and a redundant
power socket, a slot for an optional expansion module, and two stacking
ports.
Figure 3 Rear View of the Switch 3870
Expansion Module Slot
You can use this slot to install a 10-Gigabit Ethernet expansion module.
Contact your supplier for further information.
WARNING: When an expansion module is not installed, ensure the
blanking plate is fitted by tightening all screws with a suitable tool.
Power Socket
Each power supply automatically adjusts its power setting to any power
voltage in the range 100-240 VAC.
Redundant Power System Socket
To protect against internal power supply failure, you can use this socket
to connect the Switch to a SuperStack 3 Advanced Redundant Power
System. See “Connecting a Redundant Power Supply” on page 24.
Stacking Cable Ports
You can use these ports to connect the following cables:
■
Stacking Cable (3C17462) — which enables you to stack together
two switches up to three rack units apart.
■
Resilient Stacking Cable (3C17463) — which enables you to stack
together two switches up to sixteen rack units apart.
You can stack together any combination of 3870 24-port and 48-port
units, up to a maximum of eight units.
For more information on how to connect a stacking cable to your switch
units, refer to the Installation Guide that accompanies your cable.
Redundant Power System Socket
Power Socket
Stacking Cable Port (Down)
Stacking Cable Port (Up)
Expansion Module Slot
U
P
D
O
W
N