I have a customer with an ACS R3.0 in a 5-slot frame. They have the voicemail module (which they never use!) and two 308EC cards. It's my understanding that if I add another 308EC card, their extension maximum will go from 24 to 32? If I pull the voicemail card to add a fourth 308EC, it will go up to 40?

My second question has to do with preventing the programming from being lost when I power down to add these cards. I understand the (2) AA batteries are there to prevent that, but they've leaked over the years and damaged the contacts, so, I can't rely on them. The second line of defense is the backup PC card (which I have to verify is actually installed). I assume I need to do a manual backup to that card before powering down?

Thanks for your comments!

"That can't be right."