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Operation and maintenance
EN: Safety guide
1 - 3 0
Lucent Technologies - Proprietary
See notice on first page.
365-312-879R5.1
Issue 1, August 2006
Overheating
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 Installation Guide).
Detector diodes
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.
Receiver sensitivities
You can find the receiver sensitivities in the
Metropolis
®
ADM (Universal shelf)
Applications and Planning Guides
(chapter “Technical specifications”) and
Metropolis
®
ADM (Compact shelf)
Applications and Planning Guides
(chapter “Technical
specifications”).
Short-circuit
CAUTION
Destruction of circuit packs in the event of a short-circuit
A short-circuit in the network element can cause destruction of electronic components
and thus malfunctioning of the complete system.
You must therefore not handle objects such as a screwdriver in the circuit pack area of
the shelf.