Cisco 3600 Series Memory Upgrade Configuration Note 3
Safety Recommendations
Safety Recommendations
Follow these guidelines to ensure general safety:
• Keep the chassis area clear and dust-free during and after installation.
• Place the removed chassis cover in a safe place.
• Keep tools away from walk areas where you or others could fall over them.
• Do not wear loose clothing that may get caught in the chassis. Fasten your tie or scarf and roll up
your sleeves.
• Wear safety glasses when working under conditions that may be hazardous to your eyes.
• Do not perform any action that creates a potential hazard to people or makes the equipment
unsafe.
Warning The ISDN connection is regarded as a source of voltage that should be inaccessible to
user contact. Do not attempt to tamper with or open any public telephone operator (PTO)-provided
equipment or connection hardware. Any hardwired connection (other than by a nonremovable,
connect-one-time-only plug) must be made only by PTO staff or suitably trained engineers. (To see
translated versions of this warning, refer to the Regulatory Compliance and Safety Information
document that accompanied the router.)
Warning The Ethernet 10BaseT, Token Ring, serial, console, and auxiliary ports contain safety
extra-low voltage (SELV) circuits. BRI circuits are treated like telephone-network voltage (TNV)
circuits. Avoid connecting SELV circuits to TNV circuits. (To see translated versions of this
warning, refer to the Regulatory Compliance and Safety Information document that accompanied the
router.)
Safety with Electricity
Warning Before working on equipment that is connected to power lines, remove jewelry (including
rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and
can cause serious burns or weld the metal object to the terminals. (To see translated versions of this
warning, refer to the Regulatory Compliance and Safety Information document that accompanied the
router.)
Follow these guidelines when working on equipment powered by electricity:
• Locate the room’s emergency power-OFF switch. Then, if an electrical accident occurs, you can
quickly shut the power OFF.
• Before working on the system, turn OFF the power and unplug the power cord.
• Disconnect all power before doing the following:
— Working on or near power supplies
— Installing or removing a router chassis or network processor module
— Performing a hardware upgrade
• Do not work alone if potentially hazardous conditions exist.
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