Laser And Led Safety - Cisco CRS-1 - Carrier Routing System Router Hardware Installation Manual

Chapter 4 Preparing to Install a SIP or a SPA
Following are guidelines for preventing ESD damage:
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Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should be
between 1 and 10 megohms (Mohms).

Laser and LED Safety

An optical single-mode transmitter 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. These warnings apply to SPAs and SFP modules that transmit signals through
an optical carrier signal. The single-mode aperture port contains a laser warning label, as shown in
Figure
Figure 4-1
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
Warning
beams or view directly with optical instruments. Statement 1051
Class 1 laser product. Statement 1008
Warning
OL-17439-01
Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.
Connect the equipment end of the strap to an unfinished chassis surface.
When installing a component, use any available ejector levers or captive installation screws to
properly seat the bus connectors in the backplane or midplane. These devices prevent accidental
removal, provide proper grounding for the system, and help to ensure that bus connectors are
properly seated.
When removing a component, use any available ejector levers or captive installation screws to
release the bus connectors from the backplane or midplane.
Handle carriers by available handles or edges only; avoid touching the printed circuit boards or
connectors.
Place a removed board component-side-up on an antistatic surface or in a static shielding container.
If you plan to return the component to the factory, immediately place it in a static shielding
container.
Avoid contact between the printed circuit boards and clothing. The wrist strap only protects
components from ESD voltages on the body; ESD voltages on clothing can still cause damage.
Never attempt to remove the printed circuit board from the metal carrier.
4-1.
Class 1 Laser Warning Labels for Single-Mode Port
CLASS 1 LASER PRODUCT
LASERPRODUKT DER KLASSE 1
PRODUIT LASER DE CLASSE 1
1
PRODUCTO LASER CLASE 1
Cisco CRS-1 Carrier Routing System SIP and SPA Hardware Installation Guide
Laser and LED Safety
4-3