3Com 3CR17661-91 manual Power-up, Sequence, Powered-up and ready for operation, Switch 4200G

Placing Units On Top of Each Other 25

Placing Units On If the Switch units are free-standing, up to four units can be placed one

Top of Each Other on top of the other. If you are mixing a variety of 3Com equipment, the

smaller units must be positioned at the top.

If you are placing Switch units one on top of the other, you must use the self-adhesive rubber feet supplied. Apply the feet to the underside of each Switch, sticking one in the marked area at each corner. Place the Switch units on top of each other, ensuring that the feet of the upper unit sit fully on the lower unit.

The Power-up	The following sections describe how to get your Switch 4200G
Sequence	powered-up and ready for operation.

Powering-up the Use the following sequence of steps to power-up the Switch.

Switch 4200G

1Plug the power cord into the power socket at the rear of the Switch.

2Plug the other end of the power cord into your power outlet.

The Switch powers-up and runs through its Power On Self Test (POST), which takes approximately one minute.

Checking for Correct During the Power On Self Test, all ports on the Switch are disabled and Operation of LEDs the LEDs light. The PWR LED will flash green during the POST.

When the POST has completed, check the PWR LED to make sure that your Switch is operating correctly. Table 7 shows possible colors for the LED.

Table 7 PWR LED Colors

Color	State
Green	The Switch is powered-up and operating normally.
Red	The Switch has failed its Power On Self Test (POST).
Yellow flashing	Some ports have failed POST*
Off	The Switch is not receiving power.

*In this event you can still use the Switch using the remaining ports that have passed the POST.