3Com 3CRWDR200A-75 - Manual (Page 17)

Rear Panel 17
Only use the power adapter supplied with this Router. Do not use any
other adapter.
10 Power Adapter OK LED
Green
Indicates that the power adapter is supplying power to the Router. If the
LED is off, there may be a problem with the power adapter or adapter
cable.
11 Reset Button
Press this button to reset your Router to factory default.
12 Four 10/100 LAN ports
Using suitable RJ-45 cable, you can connect your Router to a computer,
or to any other piece of equipment that has an Ethernet connection (for
example, a hub or a switch). The LAN ports will automatically set
themselves to MDI or MDIX depending on the device to which they are
connected and the type of cable used.