If it's an APC ups, you can replace the battery without turning off the ups.
For the bcm itself if it's a version 4.0 go in Administration-utilities-reset-shutdown.
There's no need to replace the Bios battery.
On a 400, it might take a while longer than 5 minutes. I usually see core telephony come back up within 5 minutes, but callpilot can take 15-20 minutes, or even more.
I have only worked on a few BCM I am a MICS man and I am always concerned about powering down a 10 year old system that uses a hard drive.
I have heard hard drive problems with the BCM. I am trying to troubleshoot the 8 port GASM that I can only get battery on and change the UPS batteries at the same time. All of a sudden this has started to happen on teh GASM on all 8 ports. It was suggested that I power donw take out the GASM and reseat it.
What is strange is that if I get battery why won't I get dial tone when I go off hook with my test set?
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