Samsung SGH-X427 - Manual (Page 53)

Options During a Call
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Muting/Sending Key Tones
These options allow you to turn the key tones off or on. If
the Mute keys option is selected, your phone does not
transmit the key tones. It allows you to press keys without
hearing annoying key tones during a call.
Note: To communicate with answering machines or
computerized telephone systems, the Send keys
option must be selected.
Sending Tones
This option allows you to send the correct type of
tones if you need to enter a password or account
number when calling an automated system, such as
a bank. To send tones:
1. Press the Options soft key.
2. Highlight the Send Tones option.
3. Press the OK soft key.
4. Enter the required number and press the OK soft
key.