1-Port and 2-Port ISDN-PRI Network Module Configuration Note 5
Safety Recommendations
Warning
Network hazardous voltages are present in the BRI cable. If you detach the BRI cable,
detach the end away from the router first to avoid possible electric shock. Network hazardous
voltages also are present on the system card in the area of the BRI port (RJ-45 connector), regardless
of when power is turned off. (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 emergency power-OFF switch in the room in which you are working. Then, if an
electrical accident occurs, you can quickly shut the power OFF.
•
Before working on the router, turn OFF the power and unplug the power cord.
•
Disconnect all power before doing the following:
— Installing or removing a router chassis
— Working near power supplies
— Performing a software upgrade
•
Do not work alone if potentially hazardous conditions exist.
Warning
Before opening the chassis, disconnect the telephone-network cables to avoid contact
with telephone-network voltages. (To see translated versions of this warning, refer to the Regulatory
Compliance and Safety Information document that accompanied the router.)
Warning
Do not work on the system or connect or disconnect cables during periods of lightning
activity. (To see translated versions of this warning, refer to the Regulatory Compliance and Safety
Information document that accompanied the router.)
•
Never assume that power is disconnected from a circuit. Always check.
