7
Table 4 Harmful gas concentration limits
Gas Max. (m
/m
3
)
SO
2
0.2
H
2
S 0.006
NH
3
0.05
Cl
2
0.01
To prevent overheating:
• Provide adequate clearance for air flow, including at least 10 cm [3.94 in] ventilation space around
the router's air intake and outlet vents.
• Make sure the site has an adequate cooling system.
EMI
EMI from any source adversely affects the router.
To prevent EMI:
• Use electromagnetic shielding when necessary.
• Take measures against interference from the power grid.
• Position the router as far as possible from any power source's grounding equipment or light-
prevention equipment.
• Position the router as far as possible from radio transmitters, radar, and all high-voltage or high-
frequency equipment.
Lightning protection
To protect the router from lightning:
• Make sure the grounding cable of the chassis is grounded properly.
• Make sure the grounding terminal of the AC power receptacle is grounded properly.
• Install a lightning arrester at the input end of the power supply.
• Install a lightning arrester at the input end of outdoor signal lines (for example, E1/T1 line) to which
the router’s interface modules are connected.
Installation tools
Accessories provided with the router
• Power cord
• Console cable
• Grounding cable
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