CANOGA PERKINS 9171 Metro Ethernet Routing Switch - Manual (Page 8)

9171 Installation Guide
Proprietary & Confidential Canoga Perkins Metro Ethernet Routing Switch Page 8 of 26
Cl2. For the specific requirement, see Table 2-3.
Table 2-3 Harmful Gas Threshold in the Equipment Room
Gas Maximum concentration (mg/m3)
SO2 0.2
H2S 0.006
NH3 0.05
Cl2 0.01
2.1.5 Electromagnetic Susceptibility
Switches may be affected by the interferences from outside the system, which will have an effect on devices
through conduction of capacitance coupling, inductive coupling, electromagnetic wave radiation, common
impedance (including ground system) coupling and wires (power wire, signal wire and output signal wire, etc.).
The following attention should be paid to:
 AC power supply system is TN system, and AC power socket should be single-phase 3-wire outlet
with protective earth (PE) so that filter circuit on devices can effectively filter interference from electric
grid.
 Places where switches work should be kept away from strong-power radio transmitting station, radar
transmitting station, high-frequency high-current devices.

Electromagnetic shielding should be adopted when necessary, i.e. interface cables use shielded
cables.

Interface cables are required to be arranged indoors instead of outdoors to prevent signal ports of
devices from being damaged by over voltage and over current generated from lightning.
2.1.6 Laser Use Safety

9171 series of routing switches are Class 1 laser devices.

Do not stare at the optical interfaces directly when the optional optical interfaces of 9171 series of
routing switches are in operating mode, since light beam emitting from fiber has high energy which
may be harmful to retina.