Nokia 2160 - 9. Touch Tones

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9. Touch Tones

Your phone is a “Touch Tone” phone, meaning that it
creates certain sounds when you press the keys.
These sounds can be used for many automated, over-
the-phone services such as checking your bank
balance, using your voice mailbox options, and even
checking airplane arrival and departure times.

Touch Tones are called “DTMF” (Dual Tone
Multifrequency) tones in the phone.