Contents

1 Preparing for installation· 1-1

Safety recommendations· 1-1

Safety symbols· 1-1

General safety recommendations· 1-1

Electricity safety· 1-1

Laser safety· 1-1

Examining the installation site· 1-2

Temperature and humidity· 1-2

Cleanliness· 1-2

Cooling system·· 1-3

Grounding· 1-3

ESD prevention· 1-3

EMI 1-4

Lightning protection· 1-4

Power supply· 1-4

Installation tools· 1-4

Installation accessories· 1-5

Pre-installation checklist 1-5

 

1 Preparing for installation

Safety recommendations

To avoid bodily injury and damage to the router, read all safety recommendations carefully before installation. Note that the recommendations do not cover every possible hazardous condition.

Safety symbols

When reading this document, note the following symbols:

 WARNING means an alert that calls attention to important information that if not understood or followed can result in personal injury.

 CAUTION means an alert that calls attention to important information that if not understood or followed can result in data loss, data corruption, or damage to hardware or software.

General safety recommendations

·     Keep the chassis clean and dust-free.

·     Do not place the router on a moist area, and avoid liquid flowing into the router.

·     Make sure the ground is dry and flat and anti-slip measures are in place.

·     Ensure good ventilation in the equipment room and keep the air inlet and outlet vents of the router free of obstruction.

·     Use a screwdriver to fasten screws.

·     After completing the installation, move the empty packaging materials and installation tools away from the router area.

·     Keep the chassis and installation tools away from walk areas.

Electricity safety

·     Clear the work area of possible electricity hazards, such as ungrounded power extension cables, missing safety grounds, and wet floors.

·     Locate the emergency power-off switch in the room before installation so you can quickly shut power off when an electrical accident occurs.

·     Do not work alone when the router has power.

·     Never assume that power has been disconnected from a circuit. Always check.

Laser safety

	WARNING! ·     Disconnected optical fibers or transceiver modules might emit invisible laser light. Do not stare into beams or view directly with optical instruments when the router is operating. ·     Before you remove the optical fiber connector from a fiber port, execute the shutdown command in interface view to shut down the port.

 

CAUTION: ·     Insert dust caps into open optical fiber connectors to protect them from contamination and ESD damage. ·     Insert dust plugs into open fiber ports and transceiver module ports to protect them from contamination and ESD damage.

 

Examining the installation site

The router must be used indoors. To ensure correct operation and long service life of your router, make sure the installation site meets the following requirements.

Temperature and humidity

To ensure correct operation and long lifespan of the router, make sure the temperature and humidity in the equipment room meet the requirements as described in Table1-1.

·     Lasting high relative humidity tends to cause poor insulation, electricity leakage, mechanical property change of materials, and corrosion of metal parts.

·     Lasting low relative humidity is likely to cause washer contraction and ESD and cause problems including loose mounting screws and circuit failure.

·     A high temperature is the most undesirable condition, because it accelerates the aging of insulation materials and significantly lowers reliability and service life of the router.

Table1-1 Temperature and humidity requirements

Item	Operating	Storage
Temperature	–20°C to +60°C (–4°F to +140°F)	–40°C to +70°C (–40°F to +158°F)
Humidity	5% RH to 95% RH, noncondensing	5% RH to 95% RH, noncondensing

 

Cleanliness

Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of metal components and contact points, especially when indoor relative humidity is low. In the worst case, electrostatic adsorption can cause communication failure.

Table1-2 Dust concentration limit in the equipment room

Substance	Concentration limit (particles/m3)
Dust particles	≤ 3 × 104 (No visible dust on desk in three days)
NOTE: Dust particle diameter ≥ 5 µm

 

The equipment room must also meet limits on salts, acids, and sulfides to eliminate corrosion and premature aging of components, as shown in Table1-3.

Table1-3 Harmful gas limits in the equipment room

Gas	Max. (mg/m3)
SO2	0.2
H2S	0.006
NH3	0.05
NO2	0.04
Cl2	0.01

 

Cooling system

The router uses left-to-right airflow for heat dissipation, as shown in Figure1-1.

For adequate cooling of the router, follow these guidelines:

·     Plan the installation location for the router based on its airflow direction.

·     Ensure a minimum clearance of 100 mm (3.94 in) around the air inlet and outlet vents on the router.

·     Make sure that the installation site has a good cooling system.

Figure1-1 Airflow through the chassis

 

Grounding

Correctly grounding the router is crucial to lightning protection, anti-interference, and ESD prevention. Use a good grounding system for the router. Make sure the resistance between the chassis and the ground is less than 1 ohm.

For more information about grounding the router, see "Grounding the router."

ESD prevention

	CAUTION: Check the resistance of the ESD wrist strap for safety. The resistance reading must be in the range of 1 to 10 megohm (Mohm) between human body and the ground.

 

Preventing electrostatic discharge

To prevent electrostatic discharge (ESD) damage, follow these guidelines:

·     Make sure the router, workbench, and rack are reliably grounded.

·     Take dust-proof measures for the equipment room.

·     Maintain the humidity and temperature at acceptable levels.

·     Before handling the router, wear an ESD clothing, ESD gloves and an ESD wrist strap, and remove conductive objects such as jewelry and watches to avoid electric shock or burns.

Attaching an ESD wrist strap

No ESD wrist strap is provided with the router. Prepare it yourself.

To attach an ESD wrist strap:

1.     Wear the wrist strap on your wrist.

2.     Lock the wrist strap tight around your wrist to keep good contact with the skin.

3.     Secure the wrist strap lock and the alligator clip lock together.

4.     Attach the alligator clip to the rack or workbench.

EMI

All electromagnetic interference (EMI) sources, from outside or inside of the router and application system, adversely affect the router in the following ways:

·     A conduction pattern of capacitance coupling.

·     Inductance coupling.

·     Electromagnetic wave radiation.

·     Common impedance (including the grounding system) coupling.

To prevent EMI, use the following guidelines:

·     Take effective measures to filter interference from the power grid.

·     Separate the working earthing system of the router from the grounding facility and lightning protection facility of the other electrical devices as far as possible.

·     Keep the router far away from high-power transmitting stations and radar stations as well as high-frequency high-power devices.

·     Use electromagnetic shielding, for example, shielded interface cables, when necessary.

Lightning protection

To better protect the router from lightning, do as follows:

·     Make sure the chassis is reliably grounded.

·     Make sure the grounding terminal of the power receptacle is reliably grounded.

·     Install a lightning arrester at the input end of the power supply to enhance the lightning protection capability of the power supply.

Power supply

Verify that the power supply system at the installation site is stable and satisfies the device power requirements such as power input mode and rated input voltage. For more information about power consumptions, see "Appendix A Chassis views and technical specifications."

Installation tools

No installation tools are provided with the router. Prepare them yourself as required.

Figure1-2 Installation tools

 

Installation accessories

Figure1-3 Installation accessories

 

Pre-installation checklist

Table1-4 Pre-installation checklist

Item		Requirements	Result
Installation site	Ventilation	·     A minimum clearance of 100 mm (3.94 in) is reserved around the air inlet and outlet vents. ·     The installation site has a good ventilation system.
	Operating temperature	–20°C to +60°C (–4°F to +140°F)
	Operating humidity	5% RH to 95% RH (noncondensing).
	Cleanliness	·     Dust concentration ≤ 3 × 104 particles/m3. ·     No visible dust on desk within three days.
	Grounding requirements	·     The grounding specifications for the equipment room comply with national and industry standards. ·     All communication devices in the equipment room are reliably grounded. ·     The working earthing and protective earthing systems of the communication power supplies use the same earthing conductor set with the protective earthing system of the communication devices.
	ESD prevention	·     The router, rack and workbench are reliably grounded. ·     Dust-proof measures are taken in the equipment room. ·     Humidity and temperature are maintained at acceptable levels. ·     Before handling the router, wear an ESD clothing, ESD gloves and an ESD wrist strap, and remove conductive objects such as jewelry and watches to avoid electric shock or burns.
	EMI prevention	·     Effective measures are taken for filtering interference from the power grid. ·     The working earthing of the router is away from the grounding facility of power equipment or lightning protection grounding facility. ·     The router is far away from radio transmitting stations, radar stations, and high-frequency high-current devices. ·     Electromagnetic shielding, for example, shielded interface cables, is used as required.
	Lightning protection	·     The router is reliably grounded. ·     The grounding point of the power receptacle is reliably grounded. ·     (Optional.) Network port lightning arresters are available. ·     (Optional.) Power lightning arresters are available.
	Electricity safety	·     An uninterrupted power supply (UPS) is available. ·     The power-off switch in the equipment room is located so that the power can be immediately shut off when an accident occurs.
	Workbench	·     The workbench is sturdy and stable. ·     The workbench is reliably grounded.
	Rack	·     The rack has a good ventilation system. ·     The rack is sturdy and can support the router and its accessories. ·     The rack has a size that can accommodate the router. ·     A minimum distance of 0.8 m (2.62 ft) is reserved between the rack and walls or other devices.
Safety precautions	·     The router is far away from any moist area and heat source. ·     The power-off switch in the equipment room is located.
Tools	·     Installation accessories supplied with the router are available. ·     User-supplied tools are available.
Reference	·     Documents shipped with the router are available. ·     Online documents are available.