9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. II-3-21
FAN
One 1RU FAN card is required for an INU.
One 2RU or two 1RU FAN cards are required for an INUe.
• An updated IDCe (INUe chassis) entered production in July 2007. It supports
both 1RU and 2RU FANs but is supplied standard with a 2RU FAN.
The FAN is field replaceable and can be hot swapped. Its removal will not
interrupt user traffic.
The FAN plug-in holds two long-life axial fans. Fan operation is temperature
controlled and is performance monitored by the NCC. Under normal conditions
one fan operates, cycled between the two fans. Both fans will operate if the first
fan fails to keep the temperature below a preset threshold.
The LED is off (no illumination) for normal operation. Red indicates a critical
FAN alarm.
Figure 3-11. Fan Plug-in
Status LED Status LED provides indications of:
Off INU/INUe power off
Green Normal operation
Orange flashing Configuration not supported or software / hardware
incompatible
Red Critical alarm
No Item/Label Description
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