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.

Warning

Statement 1028—More Than One Power Supply This unit might have more than one power supply connection. To reduce risk of electric shock, remove all connections to de-energize the unit.

Warning

Statement 1046—Installing or Replacing the Unit To reduce risk of electric shock, when installing or replacing the unit, the ground connection must always be made first and disconnected last. If your unit has modules, secure them with the provided screws.

Warning

Statement 2004—Grounded Equipment This equipment is intended to be grounded to comply with emission and immunity requirements. Ensure that the switch functional ground lug is connected to earth ground during normal use.

Warning

Statement 1074—Comply with Local and National Electrical Codes To reduce risk of electric shock or fire, installation of the equipment must comply with local and national electrical codes.

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.

Note	Statement 7001—ESD Mitigation This equipment may be ESD sensitive. Always use an ESD ankle or wrist strap before handling equipment. Connect the equipment end of the ESD strap to an unfinished surface of the equipment chassis or to the ESD jack on the equipment if provided.

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. The following port(s) are considered intrabuilding ports on this equipment: RJ-45 Management Ethernet Port

Warning

Statement 7005—Intrabuilding Lightning Surge and AC Power Fault The intrabuilding port(s) of the equipment or subassembly is suitable for connection to intrabuilding or unexposed wiring or cabling only. The intrabuilding port(s) of the equipment or subassembly MUST NOT be metallically connected to interfaces that connect to the OSP or its wiring for more than 6 meters (approximately 20 feet). These interfaces are designed for use as intrabuilding interfaces only (Type 2, 4, or 4a ports as described in GR-1089) and require isolation from the exposed OSP cabling. The addition of primary protectors is not sufficient protection in order to connect these interfaces metallically to an OSP wiring system. The following ports are considered intrabuilding ports on the equipment: RJ-45 Management Ethernet Port

Note

Statement 7011—Surge Protection Device Requirements for GR-1089 Antenna Ports Protect equipment antenna ports, that are classified as Type 6 according to GR-1089-CORE, with lightning surge protectors that are rated at a minimum of 600 V peak surge of 1.2/50 uS duration. Connecting a Cable to the GNSS Antenna Interface GNSS modules have built-in ESD protections on all pins, including the RF-input pin. However, additional surge protection is required if an outdoor antenna is being connected. The Lightning Protector must be able to provide a low clamping voltage (less than 600V). A lightning protection must be mounted at the place where the antenna cable enters the building. The primary lightning protection must be capable of conducting all potentially dangerous electrical energy to PE (Protective Earth). Surge arrestors should support DC-pass and suitable for the GPS frequency range (1.575GHz) with low attenuation.

Warning

Statement 7012—Equipment Interfacing with AC Power Ports Connect this equipment to AC mains that are provided with a surge protective device (SPD) at the service equipment that complies with NFPA 70, the National Electrical Code (NEC).

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

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

Note	Statement 7018—System Recover Time The equipment is designed to boot up in less than 30 minutes provided the neighboring devices are fully operational.

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.

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.