8
General Safety Precautions
OL-2186-01
General Safety Precautions and Maintenance Guidelines
Warning
Use caution when installing or modifying telephone lines.
Warning
To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord.
Warning
Secure all power cabling when installing this unit to avoid disturbing field-wiring connections.
Warning
Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord.
Warning
This equipment will be inoperable when main power fails.
Warning
The power supply circuitry for the equipment can constitute an energy hazard. Before you install or
replace the equipment, remove all jewelry (including rings, necklaces, and watches). Metal objects
can come into contact with exposed power supply wiring or circuitry inside the equipment. This
could cause the metal objects to heat up and cause serious burns or weld the metal object to the
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
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.
Warning
Ultimate disposal of this product should be handled according to all national laws and regulations.
Warning
This chassis must be installed in a rack that is secured to the building structure.
Warning
Make sure that your equipment rack is properly ventilated.
Warning
The ports labeled “CNSL,” “AUX,” “ENET,” “Tx,” and “Rx (DS3)” are safety extra-low voltage (SELV)
circuits. SELV circuits should only be connected to other SELV circuits. Because the Basic Rate
Interface (BRI) circuits are treated like telephone-network voltage (TNV), avoid connecting the SELV
circuit to the TNV circuits.
