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MMC ITEM: ring and tone[tone cadence]
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With the tone cadence menu, you can
change several parameters of tones used
system wide, which are whether a tone is
continuous or interrupted, what its two
step cadence values are if interrupted.
There are following tones in system.

. DIAL TONE
. BUSY TONE
. DND TONE
. TRANSFER TONE
. MESSAGE WAIT TONE
. RESERVED 1
. RESERVED 2
. RING BACK TONE
. CONFIRM TONE
. CAMP ON TONE
. RING TONE
. ERROR TONE
. RESERVED 3
. RESERVED 4