The following guidelines ensure your safety and protect the equipment. This list does not include all the potentially hazardous situations. Therefore, you must be alert.

• Before moving the system, always disconnect all power cords and interface cables.

• Never assume that power is disconnected from a circuit; always check.

• Before and after installation, keep the chassis area clean and dust free.

• Keep tools and assembly components away from walk areas where you or others can trip over them.

• Do not work alone if potentially hazardous conditions exist.

• Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.

• Do not wear loose clothing that may get caught in the chassis.

• When working under conditions that may be hazardous to your eyes, wear safety glasses.

Be sure to observe the following safety precautions when you work on the chassis.

Warning

Statement 1006—Chassis Warning for Rack-Mounting and Servicing To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety: This unit should be mounted at the bottom of the rack if it is the only unit in the rack. When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack. If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack.

Warning

Statement 1008—Class 1 Laser Product This product is a Class 1 laser product.

Note

Statement 1089—Instructed and Skilled Person Definitions An instructed person is someone who has been instructed and trained by a skilled person and takes the necessary precautions when working with equipment. A skilled person or qualified personnel is someone who has training or experience in the equipment technology and understands potential hazards when working with equipment.

Warning

Statement 1090—Installation by a Skilled Person Only a skilled person should be allowed to install, replace, or service this equipment. See statement 1089 for the definition of a skilled person.

When working on equipment that is powered by electricity, follow these guidelines:

• Locate the room’s emergency power-off switch. If an electrical accident occurs, you know where to quickly turn off the power.

• Before starting work on the system, turn off the DC main circuit breaker and disconnect the power terminal block cable.

• Disconnect all power when:

  • Working on or near power supplies

  • Installing or removing a device chassis or network processor module

  • Performing most hardware upgrades

• Never install equipment that appears damaged.

• Carefully examine your work area for possible hazards, such as moist floors, ungrounded power extension cables, and missing safety grounds.

• Never assume that power is disconnected from a circuit; always check.

• Never perform any action that creates a potential hazard to people or makes the equipment unsafe.

• If an electrical accident occurs and you are uninjured:

  • Use caution to avoid injuring yourself.

  • Turn off power to the device.

  • Seek medical attention, if necessary.

Use the following guidelines when working with any equipment that is disconnected from a power source, but connected to telephone wiring or network cabling:

• When installing or modifying telephone lines, use caution.

• Never install telephone jacks in wet locations unless the jack is designed to handle such locations.

• Never install telephone wiring during a lightning storm.

The NEBS-GR-1089-CORE regulatory compliance statements and requirements are discussed in this section.

Warning

Statement 7003—Shielded Cable Requirements for Intrabuilding Lightning Surge The intrabuilding port(s) of the equipment or subassembly must use shielded intrabuilding cabling/wiring that is grounded at both ends. Copper Gigabit Ethernet ports

Note	Statement 7013—Equipment Grounding Systems—Common Bonding Network (CBN) This equipment is suitable for installations using the CBN.

Warning

Statement 7016—Battery Return Conductor Treat the battery return conductor of this equipment as DC Isolated (DC-I).

Note	Statement 8015—Installation Location Network Telecommunications Facilities This equipment is suitable for installation in network telecommunications facilities.

Note	Statement 8016—Installation Location Where the National Electric Code (NEC) Applies This equipment is suitable for installation in locations where the NEC applies.

Note	This equipment is designed to boot up in less than 30 minutes, depending on its neighboring devices that must be fully up and running.

Check the power at your site to ensure that you are receiving clean power (free of spikes and noise). If necessary, install a power conditioner.

Electrostatic Discharge (ESD) can damage equipment and impair electrical circuitry. ESD may occur when electronic printed circuit cards are improperly handled and can cause complete or intermittent failures. When removing and replacing modules, always follow these ESD prevention procedures:

• Ensure that the device chassis is electrically connected to earth ground.

• Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. To channel unwanted ESD voltages safely to ground, connect the clip to an unpainted surface of the chassis frame. To guard against ESD damage and shocks, the wrist strap and cord must operate effectively.

• If no wrist strap is available, ground yourself by touching a metal part of the chassis.

• When installing a component, use any available ejector levers or captive installation screws to properly seat the bus connectors in the backplane or midplane. These devices prevent accidental removal, provide proper grounding for the system, and help to ensure that bus connectors are properly seated.

• When removing a component, use available ejector levers or captive installation screws, if any, to release the bus connectors from the backplane or midplane.

• Handle components by only their handles or edges; do not touch the printed circuit boards or connectors.

• Place a removed component board side up on an antistatic surface or in a static-shielding container. If you plan to return the component to the factory, immediately place it in a static-shielding container.

• Avoid contact between the printed circuit boards and clothing. The wrist strap only protects components from ESD voltages on the body; ESD voltages on clothing can still cause damage.

• Never attempt to remove the printed circuit board from the metal carrier.

For the safety of your equipment, periodically check the resistance value of the antistatic wrist strap. Maintain the value between 1 and 10 MOhm.