Samsung SGH-P735MSATMB - Manual (Page 46)

Options During a Call
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The other person can hear you again.
Muting or 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
DTMF (Dual Tone Multi-Frequency) tones of the keys, which
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 a sequence of DTMF tones
You can send the DTMF tones as a group after entering the
entire number you need to send.
This option is helpful for entering a password or an account
number when you call an automated system, like a banking
service.
To send the DTMF tones:
1. While connected to the teleservice system, press the
Options soft key or key .
2. Press the Down key to highlight the Send DTMF option.
3. Press the OK soft key or key.
4. Enter the number you want to send and press the OK soft key or
key.
The tones are sent.