2-5
PA-A2 ATM CES Port Adapter Installation and Configuration
OL-3460-01
Chapter 2 Preparing to Install the PA-A2 ATM CES Port Adapter
Laser/LED Safety
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are
improperly handled, results in complete or intermittent failures. Port adapters and processor modules
comprise printed circuit boards that are fixed in metal carriers. Electromagnetic interference (EMI)
shielding and connectors are integral components of the carrier. Although the metal carrier helps to
protect the board from ESD, use a preventive antistatic strap during handling.
Following are guidelines for preventing ESD damage:
•
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.
Caution
For safety, periodically check the resistance value of the antistatic strap. The measurement should be
between 1 and 10 megohms (Mohms).
Laser/LED Safety
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
Figure 2-1
.
Figure 2-1
Laser Warning Labels for Single-Mode Port
PRODUIT LASER DE CLASSE 1
CLASS 1 LASER PRODUCT
LASERPRODUKT DER KLASSE 1
PRODUCTO LASER CLASE 1
1
H6655
