Does the VoicePro have a battery backup?

The Voice Pro has a battery that keeps its memory for up to five hours during a power failure. But it does not provide power to ring the phones. Therefore, during a power failure, the VoicePro simply passes the calls through to the phones as follows...

Line 1 rings to extension 10, line 2 ring to extension 11, and so on.

When power comes back, it will use the automated attendant to handle the calls assuming you had created a custom menu.

For extra security, it is recommended that you put the VoicePro behind a UPS that also provides surge protection. The UPS will also allow the full functioning of the unit during a power outage.