Options During a Call59To switch the microphone off temporarily:1. Press the Options soft key.2. Press the Down key to highlight the Mute option.3. Press the OK soft key.The other person can no longer hear you.To switch the microphone back on:1. Press the Options soft key.2. If necessary, press the Down key to highlight theUnmute option.3. Press the OK soft key.The other person can hear you again.Muting or Sending Key TonesThese options allow you to turn the key tones off oron. If the Mute Keys option is selected, your phonedoes not transmit the DTMF (Dual Tone Multi-Frequency) tones of the keys, which allows you topress keys without hearing annoying key tones duringa call.Note: To communicate with answering machines orcomputerized telephone systems, the Send Keys optionmust be selected.