Siemens optiPoint family - Manual (Page 24)

optiPoint 500 economy.
● 12 function keys with light-emitting
diodes
● Open listening
● Alphanumerical LCD display, tilting,
with two lines of 24 characters
● 3 dialog keys for interactive user
guidance: Yes, Return and Continue
● 2 adjusting keys (plus, minus)
for idle tone volume, idle tone quality,
call waiting tone and display contrast
(depending on system)
● Colors: arctic, mangan
4
optiPoint 50