3com DUA1770-0AAA04 User Manual

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Switch — Rear View Detail
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Figure 7   Switch 4924 — rear view 
Figure 8   Switch 4950 — rear view 
Unit Information
Label
This label shows the following:
The 3Com product name of the Switch
The 3Com 3C number of the Switch
The unique MAC address (Ethernet address) of the Switch
The serial number of the Switch
You may need this information for fault reporting purposes.
Power Socket
The Switch automatically adjusts its power setting to any supply voltage 
in the range 90-240 VAC.
Redundant Power
System Socket
To protect against internal power supply failure, you can use this socket 
to connect a SuperStack 3 Advanced Redundant Power System (RPS) to 
the Switch. See