3Com SuperStack 3 4950 Getting Started Manual page 48

48 A A: S I
PPENDIX AFETY 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.