Installation and Maintenance Manual - Aastra 5000 AMT/PTD/PBX/0058/4/6/EN
Description et caractéristiques d’un PBX 01/2011 Page 105
The mains is distributed to the power supply module's rectifier through:
• A mains switch used to power the supply module on or off
• Two fuses.
A converter inside the power supply module converts the 48 V power supply generated by
the battery or rectifier to the low voltages required by the various subassemblies of the
iPBX.
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