Panasonic EASA-PHONE KX-T2740 Operating Instructions Manual page 22

Press the PROGRAM button.
LCDisplay will show.
Wre =
Press "#", then press "7"
ZE| > | PRS, 7| | for number of rings setting.
Select the number of rings by pressing "0",
a ie CON or aT fale
"O"...Auto (LCDisplay... "9") See "Auto Setting" box
"1"...one (LCDisplay..."/") on page 13.
"7"...7 rings (LCDisplay..." ?")
B Press the AUTO/STORE button.
BM LCDisplay will show.
7 Press the PROGRAM button.
A beep is heard.
"2 rings" is the initial setting. When the unit is shipped.
14