Panasonic KX-TD816 Installation Manual page 107

2.5 Auxiliary Connection for Power
Failure Transfer
Notes
Programming References
Feature References
• In the event of a power failure, system memory is protected by the
factory-provided lithium battery. There is no memory loss except the
memories of Camp-on, Saved Number Redial, Last Number Redial,
Call Park and Message Waiting.
• The system changes the current connection to the above connection
automatically when the power supply stops.
• If DC power is available from backup batteries if AC power fails, the
system does not change the current connection to the above connection.
• The KX-TD1232 is illustrated as a main unit, and the KX-TD170 and
KX-TD180 are illustrated as an expansion units.
Section 4, System Programming
[109] Expansion Unit Type
Section 3, Features,
Power Failure Transfer
Installation 2-75