IBM 4 LINE TELEPHONE WITH CALLER ID -412CID - Manual (Page 24)

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MAKING AN OUTGOING CALL USING THE HEADSET
1. The [SPKR] LED will flash to indicate the phone is in headset mode.
2. Press the [SPKR] key. An available line is automatically selected.
3. Dial the desired number, using standard dial pad, speed dial or redial keys.
ANSWERING AN INCOMING CALL
1. Press the flashing [LINE] key (Lines 1-4) to pick up the ringing outside line.
2. Another option is to press the [SPKR] key to pick up the ringing outside line automatically.