ICX-50-750 ICX (International), issued October 2000 81
6. USING ADDITIONAL FEATURES
The ICX and S-ICX provides a variety of additional features that you can use in
your daily work:
• MIC or MIC Key (page 81)
• Off-Hook Monitor (page 82)
• Handsfree Answerback and Operation (page 82)
• Voice Recognition (page 83)
• Flash Feature (page 83)
• Conference Calls (page 83)
• Background Music (page 84)
• Timed Reminders (page 85)
• Caller ID (page 85)
• Waking Class of Service (88)
• Using Directory Numbers (page 89)
• Using Zip Mode (page 92)
• Room Monitoring (page 92)
• Silent Monitor (page 93)

USING THE MIC KEY

You can use the MIC key on your phone or an FF key assigned as a MIC key to
mute the handset or microphone so that the party on the other end cannot hear you.
(The MIC indicator flashes when using handset mute and goes off when the
microphone is muted.)
Note: To use handset mute, you must assign an FF key as a Mute key.
1. Pick up the handset or press the ON/OFF key.
2. Dial the desired number.
3. To mute your conversation:
• Using the handset mute, press the MIC FF key.
To block outgoing audio using the MIC key