Which cooling units are field replaceable?
For the 4 shelf variants of the 6500, only the individual cooling units for the 14-slot shelf are field replaceable. For the 2-slot, 7-slot and 32-slot slhelf variants, cooling fan modules contains three integrated fans (2-slot shelf) or four integrated fans (7-slot and 32-slot shelves) that are not field replaceable. A single fan failure requires replacement of the entire cooling unit module.
Replacing a cooling fan module states that:
"Cooling fan modules for the 2-slot shelf, 7-slot shelf, 6500-7 packet-optical shelf, and 32-slot shelf contain multiple integrated fans. A fault tolerant fan control circuit ensures that if one of the integrated fans fails, then the remaining fans increase in speed to compensate. The integrated fans cannot be individually replaced, only the entire cooling fan module can be replaced."
Please refere to Ciena Technical Pulblication 323-1851-151 and 323-1851-545 for more information.
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