Lucent Technologies LambdaUnite Installation Manual page 53

Safety Requirements in Specific
Deployment Phases
Operation and Maintenance
Detector diodes
Short-circuit
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365-374-059
Issue a, January 2002
CAUTION
Risk of fire due to overheating.
Inadequate heat dissipation can cause heat accumulation or
even a fire in the network element.
You must therefore ensure that
•
the fan unit is installed,
•
the individual fans are not obstructed,
•
the minimum separation is maintained between two
shelves in a rack (follow the installation instructions
given in the LambdaUnite MSS Installation Guide).
CAUTION
Destruction of the detector diodes caused by too
high an input power.
Connecting the output and input of optical circuit packs with
a transmit power in excess of -3 dBm over short distances
will cause the destruction of the detector diodes, as the input
power is then too high.
Use an optical attenuator pad of approx. 10 to 20 dB
when establishing connections over short distances for
test purposes.
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