AT&T System 25 - Manual (Page 31)

dequeueing tone three short tones indicating that the call for
which you requested Callback can now be
completed.
FPDC (Floating Personal Dial Code) an extension
number associated with a person, but not a
particular telephone. This feature provides
the convenience of receiving calls at any
available telephone.
fast busy tone repeating on/off tone indicating that the
dialed number or access code was busy,
restricted, misdialed, or the trunk group
was busy.
feature access
code
fixed feature
following
forwarding
hold
inside call
leave word
calling
sequence of characters (digits, “*”, or “ # “)
that allows you to access System 25
features.
standard feature that is available to every
telephone.
features that allow you to redirect your
incoming calls to another telephone.
feature that temporarily suspends a call.
call between two or more System 25
telephones. It is signalled by one long ring.
feature that allows you to notify a person at
a
busy or unanswered telephone that you
have called. To use this feature, there must
be a VOICE POWER Voice Message System
connected to your System 25.
message waiting feature that allows you to turn on and off
the message light on telephones in the
system.
night service feature that allows you to answer calls
when the attendant is not available.
off-hook a telephone is off-hook when the handset
has been removed from its cradle, releasing
the switchhook button.
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