2
(MENU)
Press to select more menu options if applicable.
Press to confirm the current selection if applicable.
Indicates when the displayed entry is a new TAM message / new
call in TAM message list / call list.
(INT)
Press to initial an intercom call when idle (applicable when there
are at least two handsets).
(BACK)
Press to go back to previous menu level or cancel the current
action if applicable.
Press to clear a character or stop the alarm if applicable, press
to mute / unmute during a call.