Electrical Equipment Guidelines
Follow these basic guidelines when working with any electrical equipment:
• Before beginning any procedures requiring access to the chassis interior, locate the emergency power-off
switch for the room in which you are working.
• Disconnect all power and external cables before moving a chassis.
• Do not work alone when potentially hazardous conditions exist.
• Never assume that power has been disconnected from a circuit; always check.
• Do not perform any action that creates a potential hazard to people or makes the equipment unsafe;
carefully examine your work area for possible hazards such as moist floors, ungrounded power extension
cables, and missing safety grounds.
Laser Safety
Single-mode Ethernet line cards (all of the line cards) are equipped with a Class 1 laser. Multimode Ethernet
line cards (Gigabit Ethernet) are equipped with a Class 1 LED. These devices emit invisible radiation. Do not
stare into operational line card ports. The following laser warnings apply to the line cards:
Class 1 Laser Product. Statement 1008
Warning
Class 1 LED Product (Multimode). Statement 123
Warning
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or
view directly with optical instruments. Statement 1051
Warning
Laser/LED Safety for MPAs
The single-mode transmitter in the module uses a small laser to transmit the light signal to the network ring.
Keep the transmit port covered whenever a cable is not connected to it. Although multimode transceivers
typically use LEDs for transmission, it is good practice to keep open ports covered and avoid staring into open
ports or apertures. The single-mode aperture port contains a laser warning label, as shown in the figure below.
Figure 37: Laser Warning Labels for Single-Mode Port
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or
view directly with optical instruments. Statement 1051
Warning
Cisco ASR 9000 Series Aggregation Services Router Ethernet Line Card Installation Guide
70
Installing and Removing Line Cards and Transceiver Modules
Electrical Equipment Guidelines
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