Panasonic DBS 824 - Manual (Page 47)

Power Failure Transfer System Features
1-30 DBS 824-3.0/3.2-700 Revised April 2000
• A Single Line Telephone Adapter (VB-40709) is required to provide
analog ports to the PFU.
Considerations
• Up to four SLTs can be connected to one Power Failure Unit.
• If a call is in progress through the PFU when the power is restored, the call
will be disconnected.
• For added protection against power outages, backup batteries can be
installed in the DBS 824. Backup batteries provide full telephone service
and system features to all DBS 824 extensions for a limited amount of
time.
With maximum traffic, the backup batteries last up to 40 minutes.