AT&T 1815 - Manual (Page 5)

The telephone can store 9 telephone numbers, each up to 24 digits
long. A number remains stored in memory unless you change it
by storing a new number in its place.
NOTE: You may choose to store emergency numbers in memory
locations. This feature is provided only as a convenience and the
manufacturer assumes no responsibility for customer reliance upon
the memory feature.
Storing Memory Numbers
1 Press and release G.
2 Enter a telephone number (up to 24 digits). To store a
switchhook flash, press F in the appropriate
place while entering the number. To store a dialing
pause, press p in the appropriate place while
entering the number.
3 Press and release Y.
4 Press and release the memory location (1 to 9) where
the number is to be stored. You cannot use 0, # or *
as memory locations.
Dialing Memory Numbers
1 Lift the handset.
2 Press and release Y.
3 Press and release the memory location (1 to 9).
Storing Numbers Just Dialed
1 Press and release G.
2 Press and release R.
3 Press and release Y.
4 Press and release the memory location (1 to 9) where
the number is to be stored.
T E L E P H O N E M E M O R Y
Temporary Tone
Dial numbers in
telephone memory.
Store numbers in
telephone memory.
Store a pause in a
memory dialing
number.
Light is on when
phone line is in use.
When light goes on,
battery needs to be
replaced.
Access telephone
subscriber services.
Put caller on Hold.
(Light goes on when
call is on Hold.)
Mute handset
microphone.
Redial last
number called.
Adjust listening volume
during a call.