Siemens 600 Series - Manual (Page 64)

2–26 ROLMphone 300/600 User Guide
Changing Your Telephone’s Ring Tone
To change your
ring tone ➩ Get a dial tone.
➩ Dial * 5 7 2.
➩ Dial single digits (1 through 8) to hear various
tone pitches. If you have a display telephone, it
displays the selected tone’s number. The last
tone you hear before you hang up will become
the ring tone of your telephone.