3Com 3C17709 Getting Started Manual page 64

64 A A: S
PPENDIX AFETY
I
NFORMATION
WARNING: Fiber Optic ports - Optical Safety
Never look at the transmit laser while it is powered-up. Never look
directly at the fiber ports and fiber cable ends when they are
powered-up.
WARNING: Use of controls or adjustments of performance or
procedures other than those specified herein may result in hazardous
laser emissions.
WARNING: The Switch must only be fitted with 3Com approved GBIC
transceivers, as listed below.
3CGBIC91 GBIC (SX)
3CGBIC92 GBIC (LX)
3CGBIC97 GBIC (LH70)
WARNING: Mains power must be removed from the PSU before
removing the PSU. A PSU must only be powered once it has been
installed.
WARNING: The system must not be left without a power supply or a
blanking plate in either of the two slots (except during replacement of
the power supplies). Tighten all screws with a suitable screwdriver.
WARNING: Care must be taken when removing a PSU as it may be hot.
The replacement of power supplies should be completed within two
minutes to avoid normal cooling being disturbed.
WARNING: A fan tray can be temporarily removed and replaced whilst
the system is running without impacting operations. The system must not
be left with either fan tray removed for more than two minutes or
damage to the product may be caused. Tighten all screws with a suitable
screwdriver.
WARNING: Care must be taken when removing the fan trays as the fan
blades may continue to spin for a short time after removal. Keep fingers
clear.