AT&T SYSTEM 25 User Manual page 6

Buttons
A multifeature single-line terminal can have two kinds of
buttons: fixed buttons and memory buttons. While all voice
terminals in this series have fixed buttons, some models don't
have memory buttons. If your voice terminal doesn't have
memory buttons, you can disregard references to memory
buttons in this guide.
Fixed Buttons
The fixed buttons are the permanently labeled buttons on the
voice terminal. On the 420 Speakerphone, shown in Figure 1,
they are the six buttons directly above the dial pad. If you have
a different voice terminal, they may be located elsewhere. In
this guide, fixed buttons have a blue background with white
letters, as in the following list.
Use
terminal.
Redial the number you most recently dialed from the dial
pad simply by pressing
Press
flash.
Use to talk privately with someone in your office
without putting the caller on hold.
To put a call on hold, press
For hands-free calling, use
Your voice terminal may not have all six fixed buttons. If, for
example, your voice terminal doesn't have memory buttons,
then it won't have the fixed button
Memory Buttons
The 12 buttons appearing directly above the fixed buttons on the
420 Speakerphone are programmable memory buttons. You can
use these buttons (shown hand-labeled in Figure 1) to store
frequently dialed numbers. To learn how to save numbers in
memory buttons, see the heading Programming Memory Buttons in
this guide. When you save numbers in memory buttons, make
.
to program the memory buttons on the voice
for a precisely timed (0.5 seconds) switchhook
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