To ensure that a UPS actually works during a power outage, it must be subjected to a functional test at regular intervals. To this end, many systems have an automatic load test, whereby the battery will discharge at defined intervals, under load. Also, batteries must be replaced at regular intervals.
The construction of a UPS can vary, but usually includes at least the following components:
As cloud phone systems are operated in professional data centres, they are generally protected from power failures with a suitable UPS. In order for cloud telephone system users to remain unaffected by power outages they should make provision to ensure that all of the components required for telephony can continue to be supplied with energy from UPSs in the event of a break in the power supply. Equipment that should be protected includes routers, switches, PCs and IP phones.