Important Safety Information 139n This unit operates under SELV (Safety Extra Low Voltage) conditionsaccording to IEC 950. The conditions are only maintained if theequipment to which it is connected also operates under SELVconditions.n France and Peru only:This unit cannot be powered from IT † supplies. If your supplies are ofIT type, this unit must be powered by 230V (2P+T) via an isolationtransformer ratio 1:1, with the secondary connection point labelledNeutral, connected directly to earth (ground).† Impédance à la terre.n U.K. only:The Switch 9100 is covered by Oftel General Approval,NS/G/12345/J/100003, for indirect connection to a publictelecommunications system. This can only be achieved using theconsole port on the unit and an approved modem.WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. Theycannot be used as telephone sockets. Only connect RJ-45 dataconnectors to these sockets.Either shielded or unshielded data cables with shielded or unshieldedjacks can be connected to these data sockets.WARNING: Fiber Optic ports – Optical SafetyNever look at the transmit laser while it is powered-up. Never lookdirectly at the fiber TX port and fiber cable ends when they arepowered-up.WARNING: Use of controls or adjustments of performance or proceduresother than those specified herein may result in hazardous laser emissions.Lithium BatteryThe battery in the bq4830/DS1644 device is encapsulated and notuser-replaceable.