Contents

Preparing for installation· 1

Safety recommendations· 1

General safety recommendations· 1

Electricity safety· 1

Moving safety· 1

ESD prevention· 1

Laser safety· 2

Examining the installation site· 2

Weight support 2

Temperature· 2

Humidity· 2

Operating altitude· 3

Cleanliness· 3

EMI 3

Grounding· 4

Power 4

Cooling· 4

Space· 5

Tools and equipment 6

 

Preparing for installation

This chapter describes preparations for installing an SR8800-X-S router.

Safety recommendations

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

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.

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

·     Do not wear loose clothing, jewelry (for example, necklace), or any other things that could get caught in the chassis when you install and maintain the router.

Electricity safety

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

·     Locate the emergency power-off switch in the room before installation. Shut the power off at once in case accident occurs.

·     Remove all external cables, including power cords, before moving the chassis.

·     Do not work alone when the router has power.

·     Always verify that the power has been disconnected.

Moving safety

	WARNING! ·     Hold the chassis handles firmly to move the router. ·     Do not hold the handle of a fan tray or power supply, air vents, or the handle on the real panel to move the router. Doing so might cause equipment damage or even bodily injury.

 

The router is heavy and large. When you move the router, follow these guidelines:

·     Remove all the external cables, including the power cords, before moving the router.

·     Use a minimum of two people to move the router, and use a mechanical lift if necessary.

·     Lift and put down the router slowly.

ESD prevention

To prevent the electric component from being damaged by the electrostatic discharge (ESD), follow these guidelines:

·     Ground the router correctly. For how to ground your router, see "Grounding the router."

·     Always wear an ESD wrist strap and make sure it is correctly grounded when installing FRUs. For how to use an ESD wrist strap, see "Attaching an ESD wrist strap."

·     Hold a PCB by its edges. Do not touch any electronic components or printed circuit.

·     Put cards in ESD bags for future use.

Laser safety

	WARNING! ·     The router is a Class 1 laser product. ·     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.

 

Examining the installation site

The router must be used indoors. To ensure correct operation of the router and to prolong its service life, the installation site must meet the requirements in this section.

Weight support

Make sure the floor can support the total weight of the rack, chassis, cards, and power supplies, and all other components. Additionally, the floor loading plan must cover system expansion, such as adding more cards.

Temperature

	CAUTION: If condensation appears on the router when you move it to a high-temperature environment, dry the router before powering it on to avoid short circuits.

 

To ensure the correct operation of the router, make sure the room temperature is in the range of 0°C to 45°C (32°F to 113°F).

Humidity

Maintain appropriate humidity in your equipment room, as described in Table 1.

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

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

Table 1 Humidity requirements

Humidity	Range
Operating humidity	10% RH to 95% RH, noncondensing
Storage humidity	5% RH to 95% RH, noncondensing

 

Operating altitude

Table 2 Operating altitude requirements

Item	Specifications
Operating altitude	≤ 4000 m (13123.36 ft) (available altitude) ≤ 3000 m (9842.52 ft) (certified altitude)

 

Cleanliness

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

Table 3 Dust concentration limits in the equipment room

Substance	Particle diameter	Concentration limit
Dust particles	≥ 0.5 µm	≤ 1.8 × 107 particles/m3

 

Corrosive gases can accelerate corrosion and aging of components. Make sure the corrosive gases in the equipment room do not exceed the concentration limits as shown in Table 4.

Table 4 Corrosive gas concentration limits in the equipment room

Gas	Average concentration (mg/m3)	Maximum concentration (mg/m3)
SO2	0.3	1.0
H2S	0.1	0.5
Cl2	0.1	0.3
HCI	0.1	0.5
HF	0.01	0.03
NH3	1.0	3.0
O3	0.05	0.1
NOX	0.5	1.0

 

EMI

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

·     Capacitance coupling.

·     Inductance coupling.

·     Electromagnetic wave radiation.

·     Common impedance (including the grounding system) coupling.

To prevent EMI, use the following guidelines:

·     If AC power is used, use a single-phase three-wire power receptacle with protection earth (PE) to filter interference from the power grid.

·     Keep the router far away from radio transmitting stations, radar stations, and high-frequency devices to make sure the EMI levels do not exceed the compliant range.

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

Grounding

For the operating reliability of your router, follow these guidelines:

·     Use a good grounding system to protect your router against lightning shocks, interferences, and ESD.

·     Make sure the resistance between the chassis and the ground is less than 1 ohm.

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

Power

Perform the following tasks to meet the power requirements:

1.     Calculate the system power consumption

The system power consumption varies by card type, density, and fan tray power consumption. For more information about system power consumption calculation, see "Module power consumption and total power consumption."

2.     Select power supplies and determine the number of power supplies.

The total maximum output power of all power supplies must be higher than the system power consumption. For more information about available power supplies, see "Power supplies."

3.     Verify that the power system at the installation site meets the requirements of the power supplies, including the input method and rated input voltage.

Cooling

The airflow designs for all SR8800-X-S router models are the same.

For heat dissipation, make sure the following requirements are met:

·     A minimum clearance of 10 cm (3.94 in) is reserved at the inlet air vents and outlet air vents.

·     The rack for the router has a good cooling system.

·     The installation site has a good cooling system.

Figure 1 Airflow through the chassis (SR8803-X-S)

(1) Direction of the airflow into the power supplies	(2) Direction of the airflow out of the power supplies
(3) Direction of the airflow into the chassis	(4) Direction of the airflow out of the chassis

 

Space

For easy installation and maintenance, follow these space requirements:

·     Reserve a minimum of 1 m (3.28 ft) of clearance between the rack and walls or other devices.

·     For heat dissipation, make sure the headroom in the equipment room is not less than 3 m (9.84 ft).

·     To install the router in a rack, make sure the rack has enough space to accommodate the router. See Table 5 for rack requirements. For more information about chassis dimensions, see "Weights and dimensions."

Table 5 Router dimensions and rack requirements

Model	Chassis dimensions	Rack requirements
SR8802-X-S	·     Height—175 mm (6.89 in)/4 RU ·     Width—436 mm (17.17 in) ·     Depth—505 mm (19.89 in) ¡     420 mm (16.54 in) for the chassis ¡     61 mm (2.40 in) for the cable management brackets at the chassis front ¡     30.5 mm (1.20 in) for the PoE terminal box	·     A minimum of 0.8 m (2.62 ft) in depth (recommended) ·     A minimum of 61 mm (2.40 in) between the front rack posts and the front door ·     A minimum of 444 mm (17.48 in) between the front rack posts and the rear door
SR8803-X-S	·     Height—441 mm (17.36 in)/10 RU ·     Width—436 mm (17.17 in) ·     Depth—520 mm (20.47 in) ¡     420 mm (16.54 in) for the chassis ¡     100 mm (3.94 in) for the cable management brackets at the chassis front ¡     11 mm (0.43 in) for the grounding screw at the chassis rear	·     A minimum of 0.8 m (2.62 ft) in depth (recommended) ·     A minimum of 100 mm (3.94 in) between the front rack posts and the front door ·     A minimum of 420 mm (16.54 in) between the front rack posts and the rear door
SR8806-X-S	·     Height—575 mm (22.64 in)/13 RU ·     Width—436 mm (17.17 in) ·     Depth—520 mm (20.47 in) ¡     420 mm (16.54 in) for the chassis ¡     100 mm (3.94 in) for the cable management brackets at the chassis front ¡     11 mm (0.43 in) for the grounding screw at the chassis rear	·     A minimum of 0.8 m (2.62 ft) in depth (recommended) ·     A minimum of 100 mm (3.94 in) between the front rack posts and the front door ·     A minimum of 420 mm (16.54 in) between the front rack posts and the rear door
SR8810-X-S	·     Height—708 mm (27.87 in)/16 RU ·     Width—436 mm (17.17 in) ·     Depth—520 mm (20.47 in) ¡     420 mm (16.54 in) for the chassis ¡     100 mm (3.94 in) for the cable management brackets at the chassis front ¡     11 mm (0.43 in) for the grounding screw at the chassis rear	·     A minimum of 0.8 m (2.62 ft) in depth (recommended) ·     A minimum of 100 mm (3.94 in) between the front rack posts and the front door ·     A minimum of 420 mm (16.54 in) between the front rack posts and the rear door

 

	NOTE: The signal cables and power cords are routed through the front of the chassis. If you use power cords that has a conductor cross-section area of a minimum of 16 sq mm (0.02 sq in), leave more space between the front rack posts and the front door as appropriate.

 

Tools and equipment

No installation tools and equipment are provided with the router. Prepare installation tools and equipment yourself. Table 6 lists the tools and equipment that you might use during installation.

Table 6 Tools and equipment list

Category	Tool
Measuring and marking tools	Long tape Ruler (1 meter, or 3.28 ft) Gradienter Marker Chalk line Pencil
Drills	Percussion drill Electric drill Several auxiliary drill bits
Fastening tools	Flat screwdriver P4-75 mm Phillips screwdriver P1-100 mm, P2-150 mm, and P3-250 mm Socket wrench M5 Socket wrench M6 Box-end wrench
Small tools	Needle-nose pliers Diagonal pliers Combination pliers Wire-stripping pliers Crimping pliers RJ-45 crimping pliers File Handsaw
Auxiliary tools	ESD wrist strap Hair brush Tweezers Paper knife Hand bellows Electric iron Solder wire Ladder Cable stripper Vacuum cleaner Crowbar Rubber hammer
Tools for fiber-optic cleaning	Lint-free paper Optical fiber microscope
Equipment	Multimeter 500 V Megohmmeter for measuring the insulation resistance Error detector Optical power meter Earth resistance tester