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Installing Power Supplies in Cisco 3631 Routers
78-13818-03
Safety Recommendations
Warning
Before working on a system that has an on/off switch, turn OFF the power and unplug the power
cord. To see translations of the warnings that appear in this publication, refer to the Regulatory
Compliance and Safety Information document that accompanied this device.
The following warning applies to routers with a DC power supply:
Warning
Before performing any of the following procedures, ensure that power is removed from the DC
circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services
the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the
circuit breaker in the OFF position. To see translations of the warnings that appear in this
publication, refer to the Regulatory Compliance and Safety Information document that
accompanied this device.
Warning
Ultimate disposal of this product should be handled according to all national laws and
regulations. To see translations of the warnings that appear in this publication, refer to the
Regulatory Compliance and Safety Information document that accompanied this device.
Caution To avoid damaging electrostatic discharge (ESD)-sensitive components, ensure that you have
discharged all static electricity from your body before opening the chassis. Before performing
procedures described in this document, review the next section, “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
translations of the warnings that appear in this publication, refer to the Regulatory Compliance
and Safety Information document that accompanied this device.