one of my remote offices has an Option 11C with 25.4 software. Their building is scheduling a power outage in two weeks. Do I have to hire a tech to power down the PBX? or should I just do an EDD in LD43? During the blackout in NYC my Option 61C came back on perfectly (with the exception of one shelf) so I'm trying to determine if I have to spend $$ for a local Dallas tech to be there or not. thanks