Cisco 3725 - Manual (Page 2)

2
Installing AC Power Supplies in Cisco 3725 Routers
78-13820-01
Safety Recommendations
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units;
disconnect the power at the circuit breaker on DC units. 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 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.
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.
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 translations of the warnings that appear in
this publication, refer to the Regulatory Compliance and Safety Information document that
accompanied this device.