12 CHAPTER 1: INTRODUCING THE BASELINE SWITCH
(6) Self-Adhesive Pads
The unit is supplied with four self-adhesive rubber
pads.
Do not apply the pads if you intend to rack-mount
the unit.
If the unit is to be part of a free-standing stack, apply
the pads to each marked corner area on the under-
side of the unit. Place the unit on top of the lower
unit, ensuring that the pads locate with the recesses
of the lower unit.

Rear Panel

(7) Power Supply
The Switch automatically adjusts to the supply volt-
age. Only use the power cord that is supplied with
the unit.
(8) Recovery Button
Use the Recovery button on the rear panel to reset
the Switch to its factory defaults. For more informa-
tion, refer to “Resetting to Factory Defaults” on
page 43.
Package Contents
The 3Com Baseline Switch 2250 Plus package
includes the following items:
■One 3Com Baseline Switch 2250 Plus unit
■One power cord
■Four standard height, self-adhesive rubber pads
■One mounting kit
■One CD-ROM, which contains this User Guide and
the 3Com Discovery application
■One warranty flyer
Before installing and using the Switch, verify that your
Switch package has all these items. If any of the
above items are damaged or missing, contact your
3Com network supplier immediately.
Off The unit is not receiving power:
■Verify that the power cord is connected cor-
rectly
■If the unit still does not operate, contact your
3Com network supplier
Flashing
Green
■Power-on self-test is in progress
Yell ow ■Power-on self-test or loopback test failed. If
this occurs, reset the Switch to factory
defaults. Refer to “Resetting to Factory
Defaults”