AMT/PTD/PBX/0058/4/6/EN Installation and Maintenance Manual - Aastra 5000
Page 70 01/2011 Description et caractéristiques d’un PBX
3.1.6.2 Internal description
The main cabinet and expansion cabinet include, in addition to the slots for the CPU cards
and removable subassemblies:
• A backplane (UCV-S for a main cabinet or RUCV-S for an expansion cabinet) meant to
host expansion cards
• The expansion cards can be plugged in along the guides located on the sides of the
cabinets.
• A power unit connected to the backplane (UCV-S or RUCV-S)
• A fan.
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