Panasonic KX-FG2451 - Manual (Page 51)

8. Programmable Features
51
Setting the message
alert {0}{#} You can select whether or not the message indicator on the
cordless handset will flash when new messages have been
recorded (page 40).
{0} “Off” (default)
{1} “On”
Note:
L The message indicator will not flash for new messages while
the cordless handset is in use.
L Battery performance may be shortened when using this
feature (page 15).
Registering the
cordless handset {0}{0} See page 52 for details.
Feature Feature code Selection