Cisco 3620 Installation Guide download pdf (Page 4)

4 Cisco 3600 Series Memory Upgrade Conﬁguration Note

Safety Recommendations

Warning Read the installation instructions before you connect the system to its power source.

Warning Only trained and qualiﬁed personnel should be allowed to install or replace this

equipment.

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.

Warning Ultimate disposal of this product should be handled according to all national laws and

regulations.

Safety with Electricity

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.

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.

Warning To avoid electric 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.

Warning Hazardous network voltages are present in WAN ports regardless of whether power to the

router is OFF or ON. To avoid electric shock, use caution when working near WAN ports. When

detaching cables, detach the end away from the router ﬁrst.

Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact

with telephone-network voltages.

Warning Do not work on the system or connect or disconnect cables during periods of lightning

activity.

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.

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Cisco 3620 Installation Guide Page 4