NEC Electra Elite IPK II System User Manual page 515

Electra Elite IPK II
To use the headset:
 The Headset key lights when on a call. To disconnect, press the Headset key again.
 You can still use the handset for calls or respond to voice-announced Intercom calls with the headset
plugged in. The headset only activates when the Headset key is pressed.
Answer a ringing call by pressing the Headset key.

- OR -
Press the Headset key and then a line key or press Speaker then 9 to make a outgoing call.

- OR -
Press the Headset key to get intercom dial tone.

- OR -
If on a call, press the Headset key to hang up.

Headset Operation
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