Nortel Passport 15000, Hardware Installation And Maintenance, Page: 66 / 874

66 Chapter 2 Safety considerations and best practices
241-1501-240 5.2S2
operational status of specific ports on their faceplates. Not all hardware parts
have the same number, combination, or orientation of LEDs, The pattern of
LED behavior can be different for each type of hardware part when you
• initially install each plug-in part while the system is under power but not
yet in service
• add a card or module to an in-service switch
• remove a card, cable, module, or other equipment from an
When handling equipment, be familiar with the behavior of the LEDs for each
hardware part as described in the chapter on using status indicator LEDs and
sounds in 241-1501-200 Passport 15000, 20000 Hardware Description.
Knowing what each LED pattern is supposed to be will enable you to know
when there is a problem with newly installed equipment. For example, a red
LED can be transitory and does not necessarily mean a failure has occurred.
Storing and transporting circuit cards
Care is required to store or transport circuit cards or modules.
Store each card or module in its own antistatic material and transportation
package to avoid physical or ESD damage or the accumulation of dust on
contacts. Be careful not to bump the card or module while packaging it.
Store packaged cards or modules in areas where the relative humidity is less
than 95% and the temperature is less than 70 degrees Celsius (158 degrees
Fahrenheit). This significantly reduces the chances of warping the circuit
board and corrosion of electrical contacts. The nominal storage humidity is
55% and the nominal storage temperature is 20 degrees Celsius (68 degrees
Fahrenheit).
Handling cables
See the following sections for information about handling power and
processor card cables:
• “Power cables” (page 67)
• “Processor card cables” (page 67)