Installation guide

12
Upgrading System Memory in Cisco 3600 Series Routers
78-3636-05
Safety Recommendations
Warning Before performing any of the followingprocedures,ensure that power is removed from theDC 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 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
causeseriousburns orweld the metal object to the terminals. Tosee translations of the warnings that
appear in this publication, refer to the
Regulatory Compliance and Safety Information document that
accompanied this device.
Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with
telephone-network voltages. Tosee translations of the warnings that appear in this publication, refer
to the Regulatory Compliance and Safety Information document that accompanied this device.
Warning Donot work on the system or connect or disconnect cables during periods oflightningactivity. Tosee
translations of the warnings that appear in this publication, refer to the
Regulatory Compliance and
Safety Information document that accompanied this device.
Warning Do not touch the power supply when the power cord is connected. For systems with a power switch,
line voltages are present within the power supply even when the power switch is OFF and the power
cord is connected. For systems without a power switch, line voltages are present within the power
supply when the power cord is connected. 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 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 Toavoidelectric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Both
LAN and WAN ports may use RJ-45 connectors. Use caution when connecting cables. To see
translations of the warnings that appear in this publication, refer to the
Regulatory Compliance and
Safety Information document that accompanied this device.