a. Press DIAL/OK.
b. Enter the time and date using the keypad. The time must be entered in 24 hour format. The setting sequence is hour, minute, month, day, and year. Use the * key to delete any incorrect values. After setting the year, the day of the week will be set automatically.
c. Press DELETE to exit.
16.LCD Contrast - There are four values of LCD contrast from 1 (Lightest) to 4 (Darkest). To select this feature, press DIAL/OK and then use or to select a contrast value. Press DIAL/OK to confirm.
17.Set Ring - The 1220 has 10 ringer cadences and 4 ringer volumes plus OFF.
a.Press DIAL/OK. Display says RING TYPE L1.
b.Press DIAL/OK. The phone will ring with the selected ring type.
c.Use or to select a ring type.
d.Press DIAL/OK.
e.Press . Display says RING VOLUME L1.
f.Press DIAL/OK.
g.Use or to select a ring volume.
h.Press DIAL/OK.
I. Press . Display says RING TYPE L2.
j. Press DIAL/OK. The phone will ring with the selected ring type.
k. Use or to select a ring type. l. Press DIAL/OK.
m. Press . Display says RING VOLUME L2. n. Press DIAL/OK.
o. Use or to select a ring volume. p. Press DIAL/OK.
q. Press DELETE twice to exit.