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SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide Installation
Figure 22. The back panel of the STS16-20R
4. Verify that the power LED is on. If not, make sure the outlet is working properly.
If the outlet is working, but the power LED and the fans are not on, see Chapter
10, “Troubleshooting”.
5. When the SmartStack STS16-20D/STS16-20R powers on, observe the self-test
diagnostic that the unit runs for approximately 1-2 minutes. The DIAG LED is
on for the duration of the test, turning off when the self-test is complete.
6. At the completion of the diagnostics, the front panel LEDs should be
illuminated according to the status of the unit’s configuration. See the following
sections for a description of the controls and LEDs for the SmartStack STS16-
20D/STS16-20R.
➽ Note:
If the SmartStack STS16-20D/STS16-20R fails to power up correctly or if it
encounters any unrecoverable error, the ERR LED will be on or flashing on. If the
ERR LED is on or flashes, see Chapter 10, “Troubleshooting”.
➽ Caution
: If you are using the SmartStack STS-PSU Redundant Power Supply Unit
on STS16-20R, note that this unit is
not
hot-swappable.