Samsung SGH-C327 - Manual (Page 32)

Options During a Call
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To switch the microphone off temporarily:
♦
Press the Mute soft key. The other person can no longer hear you.
To switch the microphone back on:
♦
Press the Unmute soft key. 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
using DTMF tones, the Send DTMF option must be selected.
Sending a Sequence of DTMF Tones
You can send the DTMF tones 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. When you are connected to the teleservice system, press the
Options soft key.
2. Press the Down key to highlight the Send DTMF option.
3. Press the Select soft key.
4. Enter the number you want to send and press the OK soft key. The
tones are sent.