I have a 2000 IPS system that has a PIM holding 4 backup batteries that I will be replacing. Do I need to shutdown the PBX or can I just go ahead and replace the batteries?
The book says to shut 'er down but the theory, and some real world experience says you don't have to. The reality is that if you plug in a partially discharged battery into a live power supply you WILL get a spark and worse case burn the connector or knock down the system.
Shut 'er down and be safe or take your chances. Up to you.
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