Rear Panel; Expansion Module Slot; Redundant Power System Socket - 3Com SuperStack 3 3870 Getting Started Manual

Rear Panel

Power Socket

Redundant Power System Socket

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

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.
Physical Features
Stacking Cable Port (Up)
D
O
W
N
Stacking Cable Port (Down)
15
U
P