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9033630 Installation 23
Powering the Switch
To supply power to the switch, connect the power cord to the switch and
to a grounded three-prong wall outlet (Figure 2-4). See Appendix A,
“Technical Specifications” on page 27 for more information regarding
specific international power cord requirements.
Figure 2-4. Connecting the Power Cord
The Power LED lights green (see Figure 1-1). If it does not, check to make
sure that the power cable is plugged in correctly and that the power
source is good.
When power is applied, the switch conducts a series of hardware and
software tests to verify operation. If a terminal or computer is connected
to the console port, the results of the tests are displayed on the screen. If
you want to display the results of the tests after the switch has been
turned on, turn the power to the switch off then back on.
The switch performs two basic types of tests at power-up. During this
time, all the LEDs light in sequence. These tests are:
• Serial port
The serial console port test is the first test. If the switch fails, no
further tests are performed and the console displays no information.
• Memory
Memory tests on the CPU RAM are performed after the serial port
test. No results are displayed on the console.
After these tests are performed, the system initialization screen provides
the option of starting the operational software of the switch or performing
an XMODEM download to upgrade system firmware. When the
operational software is started, the system is functional and the user
interface is ready to receive commands at the console.
ELS100-48tx2m.book Page 23 Thursday, November 16, 2000 4:59 PM