Electra Elite IPK. Just setup a new MOH device for customer with this switch. While there I hooked the ksu up to a new UPS at their request because the system shuts down during power failures. I noticed 2 SMALL batteries in the lower left corner of the cabinet, are these to support the system in the event of a power outtage and if so what is the 'average' support time?
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They are there to do just what you described. The time varies with usage, from 30 min to 4 hrs. depending on how good the batteries are. With it connected to the UPS you installed, you may never need them. If it shuts down, the batteries are bad.
