Panasonic KX-T336 System Reference Manual page 634

Conditions
SLT telephones and some PITS telephones* can
be used duringpcwer failure if power failure
transfer assignment had been done in advance.
'Following PITS telephones can be used during
power failure.
P.lTS-KX-Tl23230, KX-Tl232300,
KX-T123235, KX-T61630, KX-T30630
f
When you are using the PITS ielepnones avail-
able with power failure transfer, se! t>e POWER
FAILURE switch to ON, when power failure
occurs.
If dialing cannot be done, set the DIALlfG MODE
selector to another position (PULSE or TONE).
When the power is restored, set the POWER
FAILURE switch to OFF.
If the power is restored during a conversation, set
the POWER FAILURE switch to OFF after
conversation is completed.
15-G-2